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research-article | 17-April-2021

THE OVERVIEW OF FRACTURE MECHANICS MODELS FOR CONCRETE

1. INTRODUCTION Cracking of concrete is one of the most common flaws and problems in practical engineering. It can serve as an important signal that, for example, the construction is not working properly. It may also be a direct cause of structures’ catastrophes even, if ignored. It is not an easy task to describe fracture process in concrete, as there are many factors affecting crack development and propagation. In literature usually three main stages of the crack propagation are distinguished

Amanda AKRAM

Architecture, Civil Engineering, Environment, Volume 14 , ISSUE 1, 47–57

research-article | 30-November-2017

EFFECT OF CELLULAR CONCRETE POWDER ON DURABILITY OF NORMAL STRENGTH CONCRETE

1. LITERATURE REVIEW Concrete structures that are exposed to the effect of the environment have to be designed for durability as well. Normal concrete structures without any external protection system are sensitive to environmental effects, like freezing. There are different solutions that are applied when one would like to improve the durability of concrete structures. One possibility is to add air-entraining agent to the concrete mix, which produces air bubbles in the concrete mix. It was

Zoltán GYURKÓ, Anna SZIJÁRTÓ, Mohammed ABED, Rita NEMES

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 2, 59–64

Article | 28-August-2018

SULFATE RESISTANT CONCRETE WITH ALUMINOSILICATE ADDITIVES

The paper observes an improvement of the sulphate resistance of concrete. This was achieved through creation of dense concrete structure with sulphate resistant binder matrix. Series of tests confirms the positive effect after optimizing the sieve line, also in very fine area; reducing the water-cement ratio with superplasticizer on polycarboxylate basis and restriction of the sulphate sensitive clinker. These steps were possible through adding active aluminosilicate mineral additives. They

Artem PRYYMACHENKO, Leonid SHEINICH

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 4, 101–106

Research Article | 08-February-2019

ANALYSIS OF CONCRETE CORROSION OF MANHOLE LOCATED NEAR SOURCE OF ODOROUS EMISSION

Abstract The problem of corrosion of sanitary sewer concrete concerns the elements located just behind the expansion well. Evolving odorogenic substances and bioaerosols spread in the sewage system, cause in adverse conditions both chemical and biological corrosion of concrete. The paper presents the results of tests of samples taken from the top concrete circle and from a corroded cast iron hatch of 7 years old manhole located below the expansion well. Well elements were subjected to a strong

Bożena GIL, Barbara SŁOMKA-SŁUPIK, Katarzyna KOWALSKA, Karol JASIŃSKI

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 4, 93–104

Research Article | 02-February-2017

THE FATIGUE DURABILITY OF THE MODIFIED ASPHALT CONCRETE UNDER THE EFFECT OF INTENSIVE TRAFFIC LOADS

Summary. The problem of prediction of the service life of asphalt concrete surface constructed with modified asphalt concrete application onto a traffic lane is examined. Asphalt concrete behaviour in road surface under the traffic loads was analysed. There were shown The results of experiments and their mathematical analysis of the assessment of standard and modified cold asphalt concrete fatigue life on road surface were shown. The service life of an asphalt concrete

Yuri KALGIN, Alexander STROKIN

Transport Problems, Volume 11 , ISSUE 2, 51–59

research-article | 17-April-2021

EFFECT OF CURING REGIMES ON THE MECHANICAL AND FRESH PROPERTIES OF STEEL FIBER-REINFORCED CONCRETE

1. INTRODUCTION Mechanical and durability performance of concrete depends on its production processes such as production, mixing, pouring and curing. Before concrete is brought into service, final process is the curing of concrete which is susceptible to different environmental conditions. For instance, atmospheric steam curing is essential to accelerate the strength development of concrete in precast concrete industry. Since hydration capability increases with the increment of temperature

Oğuzhan ÖZTÜRK, Eren YENIDÜNYA, Ülkü Sultan KESKIN

Architecture, Civil Engineering, Environment, Volume 14 , ISSUE 1, 69–81

Article | 28-August-2018

STRUCTURAL BEHAVIOR OF NORMAL AND HIGH-STRENGTH CONCRETE WALLS REINFORCED WITH GLASS FIBER-REINFORCED POLYMER BARS UNDER ECCENTRIC LOAD

The solution of using glass fiber reinforced polymer (GFRP) bars, as reinforcement in concrete structures to overcome the problems created by steel corrosion, is now widely accepted because of both its non-corrosive nature and good results shown by large investigation efforts. In this paper twenty tests had been conducted on reinforced concrete wall specimens of (800 mm height x 450 mm width x 50 or 70 mm thickness effective dimensions). Four specimens were reinforced with steel bars to be

Yaarub Gatia ABTAN, Hassan Falah HASSAN

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 2, 55–63

research-article | 30-November-2018

EVALUATION OF ECOLOGICAL CONCRETE USING MULTI-CRITERIA ECOLOGICAL INDEX AND PERFORMANCE INDEX APPROACH

1. INTRODUCTION The idea of optimized usage of raw materials and reduction of greenhouse gas emissions was adopted by numerous researchers all over the world [1, 2, 3, 4]. Sustainable development is encompassed in the philosophy of modern urbanization planning [5, 6, 7]. In concrete industry, this idea is becoming increasingly well aware of. Development of energy efficient technologies in concrete production is often based on the use of suitable valorised binding materials, whose production is

Wojciech KUBISSA, Roman JASKULSKI, Jiajian CHEN, Pui-Lam NG, Wioletta GODLEWSKA, Pavel REITERMAN

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 1, 97–107

research-article | 30-November-2020

HIGH TEMPERATURE PERFORMANCE OF SELF-COMPACTING CONCRETE CONTAINING BORON ACTIVE BELITE CEMENT

1. INTRODUCTION Concrete generally consists of cement, water and aggregate. The cement constitutes about 30% of concrete by volume. Therefore, the varying cement composition plays a crucial role in the behavior of concrete. Since the reinforced concrete (RC) structures could be exposed to very different climatic conditions, as a result of geographic location and altitude, it is important to evaluate the performance of cement based composites [1–3]. Cement is widely used in concrete applications

Abdulkadir Cüneyt AYDIN, Ali ÖZ, Neslihan GÖK, Barış BAYRAK

Architecture, Civil Engineering, Environment, Volume 14 , ISSUE 2, 67–78

research-article | 30-November-2017

AN EXPERIMENTAL STUDY ON FIBERLY REINFORCED CONCRETE USING POLYPROPYLENE FIBRE WITH VIRGIN AND RECYCLED ROAD AGGREGATE

produced from propylene gas when catalyst such as titanium chloride is present [1]. Fiberly reinforced concrete (FRC) is basically made of hydraulic cements, aggregates and discrete reinforcing fibers. Suitable reinforcing fibers for concrete have been produced from glass, steel, and organic polymers (synthetic fibers). Sisal and Jute are naturally occurring asbestos fibers and mineral fibers which are also used as reinforcing materials in concrete. The bases for concrete could be mortars, normally

Salim KHOSO, Muhammad Tayyab NAQASH, Sadaf SHER, Zeeshan SAEED

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 1, 73–80

Article | 28-August-2018

RESEARCH ON THE LIGHTWEIGHT CONCRETE BRIDGE DECK SLABS REINFORCED WITH GFRP COMPOSITE BARS

The main goal of the paper is the presentation of research works on static and fatigue behaviour of LWC (lightweight concrete) deck slab reinforced with GFRP (glass fibre reinforced polymer) rebars. The structural LWC with lytag type aggregate has been used for slab casting. The carrying capacity of the slabs as well as fatigue durability have been checked during experimental tests on three full-scale deck slabs. All slabs were 5.2 m long, 1.9 m wide and 0.18 m deep. One- and two-span

Agnieszka WIATER

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 4, 115–120

Article | 28-August-2018

THE SIMULATION OF CORROSION DEGRADATION OF CONCRETE SPECIMEN IN STATIONARY HEAT AND MOISTURE CONDITIONS

This paper is focused on the problem of forecasting damage in reinforced concrete specimens as the consequence of chloride corrosion. The performed numerical calculations included time necessary for filling empty pore space and tightening corrosion products in the interfacial transition zone (ITZ) . In those calculations we assumed the formation of distortional strains in the ITZ layer caused by mass increase of corrosion products dependent on corrosion current intensity.

Faustyn RECHA, Tomasz JAŚNIOK, Tomasz KRYKOWSKI

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 4, 107–113

Research paper | 10-April-2013

NEURAL NETWORKS METHOD APPLIED TO THE PROPERTY STUDY OF STEEL-CONCRETE COMPOSITE
COLUMNS UNDER AXIAL COMPRESSION

In this paper, a new type of steel-concrete composite member, concrete-filled core steel tube with outer angle steel plank reinforced concrete stub column, is proposed and a series of nonlinear 3-D(three-dimensional) full-range numerical calculations under axial compression are carried out, some important factors are analyzed, such as the strength of the concrete, the steel tube and the angle steel, the volume ratio of the steel tube and the angle steel to the overall column, position

Jianming Liu

International Journal on Smart Sensing and Intelligent Systems, Volume 6 , ISSUE 2, 548–566

research-article | 30-November-2018

EVALUATION OF TIME DEPENDENT PRESTRESS LOSSES IN PRETENSIONED CONCRETE MEMBER WITH TOP AND BOTTOM TENDONS

1. INTRODUCTION Prestress losses in a pretensioned concrete member are divided into two groups: immediate and time dependent. The immediate losses include losses due to elastic shortening of concrete, short term relaxation of prestressing tendons, increasing the temperature while curing concrete, friction at the deflecting devices, and seating of strand in the anchorage device. The time dependent losses are losses due to relaxation of prestressing steel, creep and shrinkage of concrete

Vadzim PARKHATS, Rafał KRZYWOŃ

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 3, 105–112

research-article | 30-November-2017

NON-METALLIC REINFORCEMENTS WITH DIFFERENT MODULI OF ELASTICITY AND SURFACES FOR CONCRETE STRUCTURES

1. INTRODUCTION Steel reinforced concrete (RC) is one of the most widely used structural materials in construction. Nevertheless, it is well known that, under certain environmental conditions the corrosion of steel reinforcement can lead to the deterioration or even to the collapse of structural RC elements, requesting expensive repairing and strengthening. This detrimental property of the steel reinforcement directed the interest to alternative reinforcing materials [1–7]. Using FRP material

Sandor SOLYOM, Matteo DI BENEDETTI, Anna SZIJÁRTÓ, György L. BALÁZS

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 2, 79–88

research-article | 07-January-2020

THE INTERACTIONS BETWEEN ANTI-FOAMING AND SUPERPLASTICIZING ADMIXTURES AND THEIR CONSEQUENCE FOR PROPERTIES OF SELF-COMPACTING MORTAR AND CONCRETE

1. INTRODUCTION Superplasticizers are currently the largest group of admixtures used in concrete technology. As reported by the statistics, in the last few years the consumption of this type of admixtures in the world has been constantly increasing and constitutes over 25% of the entire market. These admixtures were used in prefabrication (obtaining low coefficients of the rapid growth of strength), in ready-mixed concrete (long-term consistency of the mixture), as well as ensured the

Beata ŁAŹNIEWSKA-PIEKARCZYK

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 4, 61–71

Article | 28-August-2018

VALIDATION OF THE FIB 2010 AND RILEM B4 MODELS FOR PREDICTING CREEP IN CONCRETE

Creep strain, a requirement of the concrete design process, is a complex phenomenon that has proven difficult to model. Although laboratory tests may be undertaken to determine the creep, these are generally expensive and not a practical option. Hence, empirical code-type prediction models are used to predict creep strain. This paper considers the accuracy of both the relatively new international fibModel Code 2010 and RILEMModel B4, when compared with the actual strains measured on a range of

George C. FANOURAKIS

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 95–101

research-article | 30-November-2017

APPLICATION OF FIBERS FROM END-OF-LIFE TIRES AS A SELF-COMPACTING CONCRETE REINFORCEMENT – AN EXPERIMENTAL STUDY

1. INTRODUCTION The EU citizens used 3.6 millions of tires in 2013 based on ETRMA report from 2015 [1]. The 96% of them were recovered or recycled creating new materials. According to this report one of the material obtained in the recycling process is a steel cord, which can be further used as a concrete reinforcement. However, the data indicating for using the steel fibers reclaimed from the end-of-life tires in concrete elements are limited. The problem is connected with the fact, that even

Małgorzata PAJĄK

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 1, 105–113

Article | 28-August-2018

APPLICATION OF POTENTIOSTATIC MEASUREMENTS ACCORDING TO PN-EN 480-14 IN ASSESSMENT OF THE EFFICIENCY OF REINFORCEMENT PROTECTION AGAINST CORROSION BY CONCRETE WITH ADDITION OF FLY ASHES

Replacing part of the cement in the concrete with fly ash - products of solid fuel burning, requires testing, including the degree of the reinforcement protection against corrosion provided by concrete. The paper presents a comparison of the results of the tests of the effectiveness of corrosion protection of reinforced concrete with the addition of calcareous fly ash. Tests were conducted by two electrochemical methods. Results obtained by potentiostatic measurement on reinforcement inserts

Katarzyna DOMAGAŁA, Andrzej ŚLIWKA

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 109–115

Article | 28-August-2018

SURFACE BLAST-CLEANING WASTE AS A REPLACEMENT OF FINE AGGREGATE IN CONCRETE

In the article the possibility of using a surface blast-cleaning waste as a replacement of fine aggregate in concrete manufacturing was presented. Concretes with w/c ratio 0.6 and 300 kg/m3 dosage of cements: CEM I 32.5R and CEM II/B-V 32.5N were tested. The quite high value of the w/c ratio resulted in good compactibility of the mixtures without use of plasticizer. The replacement rate of the fine aggregate (0–2 mm) with copper slag (CS) was 33%, 66% and 100% respectively. Concretes of the

Wojciech KUBISSA, Roman JASKULSKI, Tamás SIMON

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 89–94

research-article | 30-November-2017

PROPERTIES OF COARSE MINERAL AGGREGATES AGAINST PROPERTIES OF CONCRETE

coarse aggregate (gravel), the oldest in the history of concrete-related construction, is produced in Poland in largest quantities, crushed aggregates have been readily used for special concretes and high performance concretes as well as ordinary concretes of low strain, as for example for pre-stressed concretes. Whereas natural fine aggregate (quartz sand) is practically the only one which is applied in all types of concrete – only in few cases fine crushed aggregate is used. As far as igneous rocks

Wojciech PIASTA, Waldemar BUDZYŃSKI, Jacek GÓRA

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 3, 97–105

Article | 26-August-2018

LABORATORY TESTS OF OLD REINFORCED CONCRETE PRECAST BRIDGE BEAMS

Every year all over the world many concrete structures are being disassembled for various reasons. The idea of reuse of whole structural members from disassembled or renovated structures is not a new problem but still it is not well recognized. In Department of Structural Engineering of Silesian University of Technology a wide research program was undertaken concerning acquisition and reuse of steel members [1], RC and PC members [2], [3], [4] and timber ones [5], [6]. Especially reinforced

Szymon DAWCZYŃSKI, Janusz BROL

Architecture, Civil Engineering, Environment, Volume 9 , ISSUE 2, 57–63

Article | 28-August-2018

EFFECT OF METAKAOLIN DEVELOPED FROM LOCAL NATURAL MATERIAL SOORH ON WORKABILITY, COMPRESSIVE STRENGTH, ULTRASONIC PULSE VELOCITY AND DRYING SHRINKAGE OF CONCRETE

The utilization of pozzolanic materials like metakaolin (MK) in cement mortar and concrete is growing in construction industry all around the world to reduce the CO2 release into the atmosphere and reduce energy consumption. This study instigates the performance of concrete containing locally developed metakaolin in terms of workability, unit weight, compressive strength, ultrasonic pulse velocity and drying shrinkage of concrete. The Portland cement (PC) is replaced by inclusion of developed

Abdullah SAAND, Manthar Ali KEERIO, Daddan khan BANGWAR

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 2, 115–122

research-article | 30-November-2019

LONG-TERM EFFECT OF DIFFERENT PARTICLE SIZE DISTRIBUTIONS OF WASTE GLASS POWDER ON THE MECHANICAL PROPERTIES OF CONCRETE

attention has been paid to the feasibility of using waste powdered glass as an alternative SCM in mortar and concrete production. In this respect, many attempts have been made to examine the physical, mechanical, and durability characteristics of mortar and concrete modified with waste GP [5–14]. Studies have shown that the above properties are affected by the GP pozzolanic behavior, which, in turn, depends mainly on the fineness of the particles, chemical compositions, and the substitution rate of GP

Brwa OMER, Jalal SAEED

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 4, 61–75

Research Article | 08-February-2019

STRUCTURAL HEALTH MONITORING SYSTEM OF A CONCRETE CABLE-STAYED BRIDGE

Abstract In this paper a system of the Rędziński bridge will be described. The Rędziński bridge is the biggest object along the A8 motorway around the city of Wrocław and the biggest concrete cable-stayed bridge in Poland. For the purposes of the bridge monitoring a system of 222 sensors was installed. Results from the first 5 years of work of the SHM will be presented below.

Jan BILISZCZUK, Paweł HAWRYSZKÓW, Marco TEICHGRAEBER

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 4, 69–77

Article | 28-August-2018

THAUMASITE NON-SULPHATE ATTACK AT AMBIENT TEMPERATURE AND PRESSURE

One of the products of concrete sulphate corrosion, besides gypsum and ettringite, is thaumasite. The thaumasite is a very dangerous, non binding crystalline phase, which is forming at the expense of C-S-H phase. There was a conviction that the conditions required for the formation of thaumasite in concrete are: source of calcium silicate, sulfate ions, carbonate ions and a very wet, cold (below 15°C) environment. The corrosion of concrete caused by the external source of sulphate ions during

Barbara SŁOMKA-SŁUPIK, Adam ZYBURA

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 73–80

research-article | 30-November-2017

SHEAR CAPACITY OF PRESTRESSED FRC BEAMS WITH SPARSE STIRRUP SPACING

1. INTRODUCTION Current tendencies in Hungary show a shortage of labour in the construction industry which requires the application of less labour-intensive structural solutions. The application of fibre reinforced concrete for prefabricated structural members is a promising way to reduce the demand for labour of reinforcement assembly and speed up the construction process. Results of the monitoring of existing structures [1] show the advantages of fibre reinforcement in the field of structural

Kálmán KORIS, István BÓDI

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 1, 81–88

Article | 28-August-2018

INNOVATIVE STEEL FIBERS AND THEIR EFFECT ON FIBER DISTRIBUTION IN BEAMS - EXPERIMENTAL INVESTIGATIONS

This contribution presents experimental investigations on fiber reinforced concrete (FRC). A new type of straight steel fibers (company Feel Fiber) with a length of 60 mm was used. 12 beams with a length of 6 m, a height of 0.4 m and a width of 0.5 m were produced, in order to determine the fiber distribution along them. The beams differ in the manufacturing method (cast in layers or from one side), the fiber content and the way of fiber addition. After concretes hardening, slices were cut of

Michael HUSS, Nguyen Viet TUE

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 103–108

research-article | 30-November-2020

THE TORSIONAL AND SHEAR BEHAVIOR OF STEEL FIBER REINFORCED RC MEMBERS

1. INTRODUCTION Concrete is widely used structural material, all over the world. The excellent versatility, availability, and economy of the concrete makes it a pioneer of the construction industry when it is compared to other materials. Beams/columns are one of the main structural elements of building to respond to the effects, such as bending moment, shear, and torsion. Thus, it is important to investigate the relevant behaviors of members [1, 2]. Steel fibers have been used to improve the

Abdulkadir Cüneyt AYDIN, Mahmut KILIÇ, Mahyar MAALI, Barış BAYRAK, Erkan TUNÇ

Architecture, Civil Engineering, Environment, Volume 14 , ISSUE 2, 47–65

research-article | 30-November-2018

MECHANICAL PROPERTIES OF CEMENT MORTAR WITH GRAPHENE OXIDE

1. INTRODUCTION Over the past decade, nanotechnology has attracted considerable attention in many areas of science and technology, including civil engineering and concrete structures. Since 1974, when the term “nanotechnology” was first created by Norio Taniguchi, the definition of “nanotechnology” has evolved over the years [1]. Today, one can define it as understanding, modifying and controlling matter at the atomic and molecular level to obtain novel, high performance materials featured with

Małgorzata KRYSTEK

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 1, 91–96

research-article | 18-October-2019

ADAPTATION OF FLATS IN CONCRETE SLAB BUILDINGS FOR PEOPLE WITH DISABILITIES. ISSUES, COSTS, REIMBURSEMENT OPTIONS, COMPARISONS

significant percentage of dwellings (over 80% according to the 2011 census). Due to the existing housing structure in Poland, people with disabilities tend to live in premises from the earlier periods (pre-1994). The vast majority of these are buildings constructed in a pre-fab concrete slabtechnology. The aim of the paper is to demonstrate that virtually all apartments, both those built before 1995 as well as the newer buildings built after that date, require adaptation measures in terms of accessibility

Małgorzata BARTNICKA

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 3, 7–21

research-article | 30-November-2018

THE EFFECTS OF DEAD LOADS IN CANTILEVER CONCRETING BRIDGES

(including two built as a cantilever assembly of precast concrete elements) [3]. Another large group of bridge objects [2, 5, 6, 7, 8] was created after constructing a bridge in Toruń [4] in 1998. Therefore, Polish experience in the use of cantilever concreting technology is only equal to a dozen or so years. Cantilever concreting (or assembling) technology is one of the modern methods of constructing concrete bridges. Its main advantage is the savings made in materials, scaffolding costs and formwork

Czesław MACHELSKI

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 1, 109–120

research-article | 30-November-2017

CHANGE OF THE GRADE LINE OF BRIDGES CONSTRUCTED WITH CANTILEVER CONCRETING TECHNOLOGY

-tensioned concrete bridges the distribution of internal forces is mainly influenced by static behaviour pattern of cantilevers in construction phase. Figure 1. Geometry of the Kedzierzyn-Kozle Bridge (Poland) Figure 2. Scheme of the Støvset Bridge incl. the development of deflections during the service time [2] Characteristic feature of post-tensioned long-span concrete bridges are excessive deflections. By the excessive deflections are meant those exceeding the deflection coefficient ω = 1.250

Czeslaw MACHELSKI, Bartosz PISAREK

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 2, 65–72

research-article | 30-November-2020

FBG sensors for seismic control and detection in extradosed bridges

for its structural monitoring is the Beddington Trail Bridge in Canada. In addition, this is the first extradosed concrete road bridge built in Canada. Also, it is defined as the first smart highway bridge in Canada since it uses a smart SHM system. It began service on November 5, 1993. It uses 20 sensors for measuring strain and temperature along the whole of its length. An image of this bridge which has an average length of 21.03 m is shown in Figure 5. In addition, Table 1 gives other examples

Said Saad

International Journal on Smart Sensing and Intelligent Systems, Volume 14 , ISSUE 1, 1–13

research-article | 30-November-2017

AN ADVANCED APPROACH TO DERIVE THE CONSTITUTIVE LAW OF UHPFRC

1. INTRODUCTION Good knowledge of the material parameters, the material behaviour, and an accurate constitutive law for ultra-high performance fibre-reinforced concrete (UHPFRC) are necessary to model or design structures using this composite material. Therefore a large set of test specimens were produced without fibres and with 1 vol% and 2 vol% of fibres. The ultra-high performance concrete (UHPC) matrix was the same for the three mixtures with a maximum grain size of 0.4 mm. The water to

Tamás MÉSZÖLY, Norbert RANDL

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 1, 89–96

Article | 05-September-2013

PREDICTION OF PCCP FAILURE BASED ON HYDROPHNE DETECTING

Prestressed Concrete Cylinder Pipe (PCCP) is a widely used water pipe all over the world. A major cause of PCCP failure is the internal wire break, which will emit acoustic signal. In this paper, a hydrophone-based PCCP real-time monitoring and failure-prediction system was proposed. By applying wavelet energy normalization analysis to signal feature extraction and Support Vector Machine (SVM) to signal recognition, a high prediction accuracy of 98.33% was achieved. The result showed that the

Yuan Zhang, Yibo Li

International Journal on Smart Sensing and Intelligent Systems, Volume 6 , ISSUE 4, 1582–1598

Research Article | 12-February-2019

EFFECTS OF STAIRCASE ON THE SEISMIC BEHAVIOR OF RC MOMENT FRAME BUILDINGS

Azadeh NOORIFARD, Mohammad Reza TABESHPOUR

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 4, 105–122

Article | 16-April-2018

Whose Learning is it? Fostering Student Ownership in Orientation & Mobility

advance our understanding of student ownership in O&M while providing concrete strategies to foster engagement and decision making, two key aspects of student ownership.  

Fabiana Perla, Ed.D., COMS.

International Journal of Orientation & Mobility, Volume 5 , ISSUE 1, 28–33

Article | 30-November-2018

Research on Noise Removal in Fiber Grating Sensing Signal

Xiaobo Zhou

International Journal of Advanced Network, Monitoring and Controls, Volume 3 , ISSUE 4, 87–91

Article | 26-August-2018

THE IMPACT OF POLYMER RAW MATERIALS FROM THE RECYCLING PROCESS ON THE STRENGTH OF CONNECTORS IN NON STRUCTURAL APPLICATIONS

production of plastic connectors and their impact on the load-bearing efficiency of fixing elements. The research combines also material characteristics and the properties of the investigated connectors. The research tests carried out on the connectors consisted in the assessment of their load-bearing capacity at fixing places in a base made of concrete class C20/25 or from solid ceramic brick.

Artur NOWOŚWIAT, Przemysław KNAP

Architecture, Civil Engineering, Environment, Volume 9 , ISSUE 2, 93–104

Article | 27-August-2018

CURVILINEAR STRUCTURAL ENVELOPS IN CURRENT ARCHITECTURE

The paper is focusing on constructing nonlinear shaping of structural envelope in architecture of the digital avant-garde. Digital technologies create new opportunities by allowing construction of complex forms which until recently were difficult to design and build. The first part of the paper presents a concrete structure combined with a system of spatial structure used in constructing complex geometries envelope of The Heydar Aliyev Cultural Centre in Baku (2013). The second part presents

Krystyna JANUSZKIEWICZ

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 1, 11–16

Article | 09-August-2018

TEMPERATURE IN THE ADHESIVE LAYER OF EXTERNALLY BONDED COMPOSITE REINFORCEMENT HEATED BY THE SUN

The paper describes the measurements of temperature growth in different types of the epoxy adhesive bonding external strengthening. A total of six types of models were tested: CFRP sheet and strip, two SRP tapes adhered to the concrete sample, CFRP strip and SRP tape on a timber sample. Changes in temperature were investigated during the summer in the southern Poland. The maximum measured temperatures for all models exceeded regarded as safe temperature limit of 45°C. The highest recorded

Rafał Krzywoń

Architecture, Civil Engineering, Environment, Volume 9 , ISSUE 1, 79–84

Article | 01-December-2014

RESEARCH ON UNDERWATER TARGET SIGNAL DETECTION AND RECOGNITION PROCESSING ALGORITHM

underwater target signal de-noising was presented. For multiple underwater target recognition, the model of underwater target multi-sensor signal recognition was studied. On the basis of analyzing the principle of D-S method and the fusion of multiple signal recognition, the concrete measures of D-S data fusion reasoning was researched and analyzed. By using the combination of simulation calculation and experiment measures, the results show the signal processing method is correct.

Lijuan Wang, Xiaojing Liu

International Journal on Smart Sensing and Intelligent Systems, Volume 7 , ISSUE 4, 1753–1772

Article | 28-August-2018

RESEARCH ON THE NEW CFRP PRESTRESSING SYSTEM FOR STRENGTHENING OF RC STRUCTURES

The paper presents a research on the new Polish CFRP prestressing system for strengthening of reinforced concrete structures. The system is called Neoxe Prestressing System II (NPS II). NPS II consists of two main elements: a special steel anchorages mounted on both ends of a single CFRP strip and a tensioning device. The anchorage is made of two steel plates. CFRP strip end is fixed between steel plates through bonding by epoxy resin and gripping by bolts. The tensioning device compatible with

Bartosz PIĄTEK, Tomasz SIWOWSKI

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 81–87

Article | 28-August-2018

RELIABILITY ANALYSIS OF RIGID PILE CAPS USING AN ITERATIVE STRUT-AND-TIE MODEL

José Milton de ARAÚJO

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 2, 65–75

research-article | 30-November-2018

TECHNICAL CONDITIONS OF THE UNIQUE STRUCTURE OF INVERTED SIPHON – HISTORY & PRESENT

River and the Welna River near Wagrowiec (Poland) is one of two such phenomenon in the world. Both rivers were created artificially during the melioration works in 1930. A concrete weir was built here, which makes the water set in a whirling motion and causes that the water does not mix with each other. This solution was designed by Adalbert Schulemann to protect the city against flooding. The necessity for a crossing of two independent aboveground watercourses arises when at least one of them is an

Jacek HULIMKA, Marta KAŁUŻA

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 3, 93–104

Article | 30-November-2018

Stitching the cloths of serial migrant life: The quilts of Barbara James

their new homes, toward a consideration of the concrete ‘third place’ of the second or third-time immigrant.1 While the immigrant lives between two cultures, regimes of identification, languages or political systems, the serial migrant ‘escapes’ this double bind (Ossman 2004: Sayaad 1999). Serial migrants are not diplomats or employees of multi-nationals: their moves are not framed by any international institution.2 Wherever they live they are identified according to static categories by states and

Susan Ossman

Borderlands, Volume 18 , ISSUE 1, 88–110

research-article | 30-November-2019

Evaluation of navigation system of a robot designed for greenhouse spraying

Hossein Mosalanejad, Saeid Minaei, Alimohammad Borghei, Behfar Farzaneh

International Journal on Smart Sensing and Intelligent Systems, Volume 13 , ISSUE 1, 1–9

Research Article | 14-February-2019

APPLICATION OF ARTIFICIAL NEURAL NETWORKS FOR SHORTTERM PREDICTION OF CONTAINER TRAIN FLOWS IN DIRECTION OF CHINA – EUROPE VIA KAZAKHSTAN

error signal, was used. A concrete example shows how the ANN training process is conducted and how the adjustable parameters are selected.

Zhomart ABDIRASSILOV, Aleksander SŁADKOWSKI

Transport Problems, Volume 13 , ISSUE 4, 103–113

Article | 01-December-2016

UNSUPERVISED GROUPING OF MOVING OBJECTS BASED ON AGGLOMERATIVE HIERARCHICAL CLUSTERING

In this article, we present a method to identify a grouping of sensor nodes that show similar movement patterns in an ad-hoc manner. The motivation behind the ad-hoc grouping is to allow a system to monitor complex and concrete situations of people and/or devices such as “who is/are utilizing what object(s)” and “what objects are carried together” without any supervision of human before and at the time of interaction. An agglomerative hierarchical clustering algorithm was applied to a data

Kaori Fujinami

International Journal on Smart Sensing and Intelligent Systems, Volume 9 , ISSUE 4, 2276–2296

research-article | 29-January-2021

Inclusive practice for students with neurodevelopmental disorders in Sweden

would follow the concept of “integration”. However, the literature on specific inclusive educational actions is rather scare (13), and what inclusion should entail in practice for teachers and other school staff is often not specified and followed-up, or a matter of debate (14). Therefore, it is largely unknown, if and which concrete actions are currently implemented in mainstream schools by staff which could be subsumed as inclusive, although it has been hypothesized that inclusive practice remains

Sven Bölte, Emma Leifler, Steve Berggren, Anna Borg

Scandinavian Journal of Child and Adolescent Psychiatry and Psychology, Volume 9 , 9–15

Article | 08-April-2018

Research and Implementation of Load Balancing Technology for Cloud Computing

This article selects load balancing system technology to analyze, combines the live migration technology of virtual machine, and studys the frame of virtual machine live migration as well as the mathematical model applied to concrete process of the migration. The article presents that the process of combining the specific strategies of load balance to the frame of live migration, that the simulation experiment and conclusion to this total process. The study takes Eucalyptus as experimental

Sun Hong, Wang Weifeng, Chen Shiping, Xu Liping

International Journal of Advanced Network, Monitoring and Controls, Volume 2 , ISSUE 2, 17–28

Article | 27-August-2018

SENIOR COHOUSING IN CROSS-CUTTING RESEARCH

the gender and age “lens” over the years in senior cohousing. This knowledge can be used in the future as the base to carry out the empirical research on concrete examples of the cohousing building.

Agnieszka LABUS

Architecture, Civil Engineering, Environment, Volume 9 , ISSUE 4, 21–31

research-article | 30-November-2017

EXPERIMENTAL INVESTIGATIONS OF PULL-OUT BEHAVIOUR OF SYNTHETIC FIBRES

eliminating the high deviation caused by the different amounts and distribution of fibres in the critical cross-section. The pull-out behaviour is one of the distinctive features of fibre reinforced concrete. The more we know the phenomenon of the pulling out the better we understand the mechanical behaviour of the FRC material. It can usually be observed that fibres are mainly pulled out rather than torn in the cracked cross-section of a FRC beam [7]. The higher ductility of FRC compared to plain

Mária Erdélyiné TÓTH, Anikó PLUZSIK, Tamás PLUZSIK, Bálint MORLIN

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 2, 89–95

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