European Journal of Environmental and Civil Engineering

Publisher: Taylor & Francis

Journal description

Current impact factor: 0.44

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 0.437
2012 Impact Factor 0.306
2011 Impact Factor 0.32

Impact factor over time

Impact factor
Year

Additional details

5-year impact 0.00
Cited half-life 2.80
Immediacy index 0.21
Eigenfactor 0.00
Article influence 0.00
ISSN 1964-8189

Publisher details

Taylor & Francis

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    • STM: Science, Technology and Medicine
    • Publisher last contacted on 25/03/2014
    • This policy is an exception to the default policies of 'Taylor & Francis'
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents the results of an experimental investigation into the hardened density of freshly compressed concrete and its effect on the mechanical properties including compressive strength and modulus of elasticity. The concrete specimens were compressed in a fabricated pressure apparatus under different values of pressure and reference concrete strength. Two types of pressure, long-term pressure and short-term pressure were also applied to the fresh concrete to evaluate the effect of pressure duration on the concrete density. The results indicated that the increase in the compressed concrete density increases with the increase in primary pressure and decrease in reference concrete strength. Moreover, the pressure duration poorly affects the concrete density. By considering the density, this study also provides a model for predicting the modulus of elasticity of the compressed and the uncompressed concretes, which covers the wide range of the compressive strength between 18 and 81 MPa. Finally, a comparison between the measured values of the modulus of elasticity and those calculated by the prediction models, given in ACI 318, ACI 363 and EC2, was performed, and then correction factors were proposed for the model codes to estimate the modulus of elasticity of the compressed concrete. The results showed that ACI 318 and ACI 363 models involving the concrete density yield correction factors close to one, while EC2 model involving a coefficient reflecting the effect of aggregate type gives a very higher value.
    European Journal of Environmental and Civil Engineering 07/2015; 19(6). DOI:10.1080/19648189.2014.968743
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    ABSTRACT: Ore and mineral extraction by underground mining often causes ground subsidence phenomena, and may induce severe damage to buildings. Analytical methods based on the Timoshenko beam theory is widely used to assess building damage in subsidence regions. These methods are used to develop abacus that allow the damage assessment in relation to the ground curvature and the horizontal ground strain transmitted to the building. These abacuses are actually developed for building with equivalent length and height and they suppose that buildings can be modelled by a beam with isotropic properties while many authors suggest that anisotropic properties should be more representative. This paper gives an extension of analytical methods to transversely anisotropic beams. Results are first validated with finite elements methods models. Then 72 abacuses are developed for a large set of geometries and mechanical properties.
    European Journal of Environmental and Civil Engineering 07/2015; 19(6). DOI:10.1080/19648189.2014.969386
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    ABSTRACT: The paper focuses on the propagation of debonding along an interface between a concrete substrate and a cement-based thin-bonded overlay under fatigue loading. The investigated overlay materials were fibre reinforced and rubberised cement-based mortars. Tensile tests were performed to obtain the residual normal stress–crack opening relationship for the overlay materials. The drying shrinkage of the overlay materials was characterised by tests on prismatic specimens that showed the evolution of drying shrinkage vs. the mass loss. The substrate–overlay interface was investigated by static tensile tests to provide the relationship between debonding opening and residual normal tensile stress. Its evolution under fatigue loading was assumed to follow a cyclic bridging law for plain concrete. Three-point bending fatigue tests were then carried out on repaired substrate to obtain information on the structural behaviour of the interface. The debonding propagation was monitored by a video microscope with a magnification of 175×. Relying on the identified and quantified parameters, the above-mentioned fatigue tests were modelled by the finite element method using the CAST3M code developed in France by Atomic Energy Commission. A comparison between model and experimental results shows good agreement and proves the important role of fibre reinforcement and of rubber aggregates on the durability of the repair with respect to debonding.
    European Journal of Environmental and Civil Engineering 07/2015; 19(6). DOI:10.1080/19648189.2014.965848
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    ABSTRACT: The equipment of French nuclear power plants is fixed on reinforced concrete structures with base plate with headed fasteners. Electricity of France decided to carry out an experimental research program in partnership with Laboratory of Civil and Environmental Engineering in order to optimise the design of the headed fasteners and identify safety margins. This article introduces the results of static tension tests on an anchorage composed of an anchor plate welded to four headed rods. The anchors are cast in place in a reinforced concrete block. The experimental campaign is carried out on anchors and anchor groups with reduced embedment depths. Tests on single headed rods are also carried out in order to analyse the group effects. The sliding of the anchor groups, the strain of the head rods, the strain of the stirrups and the surface concrete block displacements are measured. The collapse of the anchorages is caused by a failure of the steel rods or a concrete breakout failure for a loading ranging between 600 and 300 kN. The experimental ultimate strength is compared with ultimate load obtained from the technical specifications of Eurocode. This experimental campaign will provide a data base enabling the development of numerical models in order to improve the design.
    European Journal of Environmental and Civil Engineering 07/2015; 19(6). DOI:10.1080/19648189.2014.965850
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    ABSTRACT: Tensegrity systems are self-stressed reticulate structures, composed of a set of compressed struts assembled inside a continuum of tendons. This principle can be at the origin of large, lightweight and transparent structures. In practice, a few structures of this kind were built, partly because they are very demanding in design and analysis. In the wish to contribute to the development of practical structural applications, we propose in this paper a design procedure that combines form-finding and structural dimensioning under static load. To optimise the behaviour in the dynamic domain, we present a general methodology suited for the control of the first vibration modes. The case of a modular tensegrity footbridge is taken for application, taking into account different materials.
    European Journal of Environmental and Civil Engineering 07/2015; 19(6). DOI:10.1080/19648189.2014.965849
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    ABSTRACT: This paper presents a nonlinear beam element on a two-parameter foundation. A set of governing differential equations of the problem (strong form) is first derived. The displacement-based beam-foundation element with improved displacement shape functions (weak form) is then formulated based on virtual displacement principle. The improved functions are analytically derived based on homogeneous solution to the governing differential equilibrium equation of the problem and are employed to enhance the model accuracy. Tonti’s diagrams are used to conveniently represent the equations that govern both the strong and weak forms of the problem. An averaging technique previously proposed by the authors is employed to determine system parameters needed in evaluating the displacement shape functions. Finally, two numerical simulations are used to verify the accuracy and the efficiency of the proposed beam model. The first simulation is used to perform convergence studies of the proposed model and to show its accuracy in representing both global and local responses. The second simulation is used to address effects of the two-parameter foundation model on system responses when compared to the Winkler foundation model.
    European Journal of Environmental and Civil Engineering 07/2015; 19(6). DOI:10.1080/19648189.2014.965847
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    ABSTRACT: Porosity and crack formation are two major ordinary phenomena in concrete which alongside a reduction in the service life of concrete structures, increase maintenance and cement production needs. The main aim of running this research was to investigate the calcite precipitating-proficient indigenous bacterial strain Bacillus licheniformis AK01, isolated from loamy soils for improving concrete properties as an innovative biotechnology-based method. The healing capability of the AK01 strain was compared to three competent bacteria, including Sporosarcina pasteurii DSM-33, Pseudomonas aeruginosa MA01 and Bacillus subtilis TRPC2 to scrutinise its effects on compressive strength and water absorption in the mortar specimens. The formation and properties of calcite crystals in the cement mortar specimens was evaluated by Fourier-transform infrared spectrometry, X-ray diffraction and scanning electron microscopy analysis. AK01 strain exhibited better performance than the other recognised bacteria and could improve compressive strength about 15% and mitigate water absorption of mortar around 25% compared with controls. Thus, AK01 strain seems to be an appropriate healing agent to enhance concrete properties as an eco-friendly alternative method.
    European Journal of Environmental and Civil Engineering 05/2015; 19(5). DOI:10.1080/19648189.2014.960951
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    ABSTRACT: In the design and in the planning of execution of reinforced concrete members, knowledge of the concrete properties at both fresh and hardened state is crucial. The present research compares the behaviour of three different types of Limestone Self-Compacting Concrete designed for a 28 days compressive strength of 40, 75 and 90 MPa, respectively. After investigating the main properties at the fresh state in terms of flowability, viscosity and segregation resistance, the study focuses on both the stress–strain behaviour under uniaxial compression and on the bond properties of all the mixes. Finally, the results are compared with existing design provisions for normal vibrated concrete.
    European Journal of Environmental and Civil Engineering 05/2015; 19(5). DOI:10.1080/19648189.2014.960144
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    ABSTRACT: This article reports the results of triaxial creep tests of cataclastic sandstone cored from the dam foundation of a hydropower station. Meanwhile, the permeability measurements are performed in course of creep tests under hydro-mechanical coupling. The creep behaviours of studied rock and their effects on the permeability evolution have been analysed in detail. The results show that the studied rock exhibits pronounced irreversible time-dependent deformations. The strain rate increases by exponential functions as the deviatoric stress increased and the confining pressure decreased. The long-term strength can be defined at which the critical point of expansion strain rate is greater than the compression strain rate. In addition, important plastic deformation, obvious dilation and large strain rate are observed in the last stage of experimental tests. The permeability change shows some mutative correlation with the material porosity during the time-dependent deformation. But the trend of change is decreasing with the increase of deviatoric stress for all specimens. During the stage of steady creep, the permeability variation slowly decreases quasi-linearly. It indicates that the fluctuation has no significant effect on permeability evolution. These results may provide the basis for the establishment of hydro-mechanical coupling creep model and the long-term stability analysis of structures.
    European Journal of Environmental and Civil Engineering 04/2015; 19(4). DOI:10.1080/19648189.2014.960103
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    ABSTRACT: In order that non-destructive testing methods become quantitative tools for structure owners, it is necessary to assess their precision and sensitivity to the environment. The presented study deals with two electromagnetic methods classically used to survey road pavements and concrete structures: a radar technique and a capacitive technique. The presented investigations aim at assessing the influence of temperature and moisture on the two methods for measurements realised on concrete slabs. The temperature was ranging from 5 to 45 °C and the surrounding relative humidity (RH) evolved between 60 and 90%. The study is part of a more ambitious topic aiming at defining quantitative non-destructive methods to evaluate the water content of concrete structures on site and their state of degradation. The presented work allows assessing the sensitivity of both radar and capacitive techniques to the environmental conditions: temperature and RH. Moreover, the measurement variability of the used capacitive probes with three different sets of electrodes is estimated.
    European Journal of Environmental and Civil Engineering 04/2015; 19(4). DOI:10.1080/19648189.2014.960102
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    ABSTRACT: During earthquakes, structural elements like columns can fail by loss of strength but also by geometric instability such as buckling. The aim of this work is to analyse the experimental carrying capacity of such elements. Buckling experiments on solid wood, laminated veneer lumber and glulam specimens are carried on. Monotonous buckling tests are first carried out, in order to determine loads and displacements at instability point. They are followed by cyclic tests in the post-buckling domain (after peak). The cyclic protocol is precisely defined from displacement values obtained in monotonous tests. A damage parameter is determined based on the evolution of the extreme compression or tension apparent stresses but also on the analysis of stiffness degradation and of variation of dissipated energy during cyclic tests.
    European Journal of Environmental and Civil Engineering 03/2015; 19(3). DOI:10.1080/19648189.2014.967413
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    ABSTRACT: This study evaluates the feasibility of a new type of connection between the concrete-filled twin steel tubes (CFTST) column and steel beams. The formation and feature of the new connection were described firstly; it mainly consists of vertical stiffeners and embedded anchorage plates. The experiments were conducted on seven one-half scaled specimens including six CFTST column-beam joints and one square concrete-filled steel tube (CFST) column-beam joint. And, seismic behaviours including hysteresis curve, typical failure modes, load-carrying capacity, ductility, energy dissipation capacity, etc. were studied. Connections behaved as predicted that plastic hinges were achieved in steel beams. Connections with ribbed anchorage plates are of higher load-bearing and deformation capacity than connections with no ribs; the extension of the vertical stiffener can move the buckling zone away from the column, so the joint’s initial stiffness was improved. The hysteretic characteristic of connections was stable; the energy dissipation capacity, strength and ductility were sufficient. In the whole loading, the stiffness degradation was obvious and bearing capacity degradation was slow. Test results show that connections with good aseismatic behaviour can easily achieve the anti-seismic design principle, namely strong column-weak beam and strong joint-weak member.
    European Journal of Environmental and Civil Engineering 03/2015; 19(3). DOI:10.1080/19648189.2014.960099
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    ABSTRACT: Incrementally launched bridges, which are generally built with the static scheme of a continuous beam on supports, change their scheme several times during launching. In these different configurations, internal forces vary and bending moments of opposite signs occur in the same sections for different positions of deck during advancement. In these bridges, two different kinds of prestressing are necessary: a temporary one during launching and a definitive one in service life. In this study, the possibility of implementing automatic adjustable prestressing for the launching stages is investigated; the launch prestressing is partially supplied by a system which can change the tension value in the prestressing tendons according to the change in the loads acting on the structure. This adjustable prestressing can be either semi-automatic or totally automatic (auto-adjustable), following the concept of “organic prestressing.” The conditions of activation and deactivation of automatic prestressing through a control system of stresses and deformations are given, giving indications to designers on the additional tendons to be applied in the advanced part of the deck and on the control sections which system implementation needs. A numerical example is given to clarify the concept of adjustable prestressing, details being provided in the case study examined on the evaluation of stresses, on the choice of control sections and on the prestressing tendons, through the aid of diagrams of activation and deactivation of the adjustable prestressing. The results of the study highlight the fact that adjustable prestressing is useful for the advanced part of the deck, in the launching stages of bridges with several spans with similar lengths, especially for the bottom fibres, when sections are placed in the midspan, or for upper fibres when they pass over piers, in the case of limited nose lengths.
    European Journal of Environmental and Civil Engineering 03/2015; 19(3):327-346. DOI:10.1080/19648189.2014.949871
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    ABSTRACT: This article describes experimental and numerical studies on the structural resistance of two reinforced concrete beam-column joints. While both specimens are of similar configurations as for geometry, amount and type of steel reinforcement and concrete strength, the second is strengthened by means of carbon fibre-reinforced polymer (CFRP) at the vicinity of the joint in order to relocate the plastic hinge away from the column extremity towards the beam. Both specimens are subjected to a cyclic load followed by a generalised exponential fire curve, which implicitly represents a post-earthquake fire (PEF). The PEF resistance of the specimens subjected to various damage levels such as immediate occupancy (IO), life safety (LS) and collapse pre- vention (CP) is then evaluated based on finite element analysis. The results show that while the fire resistances of the original specimen subjected to LS and CP damage levels are about 32 and 15 min, respectively, they increase in the CFRP-strengthened specimen to about 43 and 23 min, respectively. This represents a 25% increase at LS level and a 35% increase at CP level.
    European Journal of Environmental and Civil Engineering 03/2015; 1(1):1-19. DOI:10.1080/19648189.2015.1018448
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    ABSTRACT: This study evaluates how alteration of geosynthetic clay liners (GCLs) affects the hydraulic behaviour of a composite liner when the geomembrane presenting a hole is overlying a GCL. Interface transmissivity experiments were performed on GCL specimens that were exhumed from field sites. The results reveal different trends in the flow rates, which decrease differently to their steady state values. The steady state flow rates obtained and the calculated interface transmissivities are of the same order of magnitude as results obtained with a virgin GCL. The transient flow rate results are discussed in relation with the GCLs parameters. Based on these results, a new equation is derived that links interface transmissivity to the hydraulic conductivity of GCLs that have been altered by the environment. Considering large transient flow rates in calculations result in a greater leakage volume penetrating the liner when compared to calculations of infiltrated volumes considering only steady state leakage volume for a period of time of 1, 10 or 30 years. From a practical point of view, this suggests the introduction of a factor of safety of 1.67 when calculating the flow rate in composite liners in order to take into account the alteration by the environment of GCLs.
    European Journal of Environmental and Civil Engineering 02/2015; DOI:10.1080/19648189.2015.1005161
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    ABSTRACT: This paper is devoted to the numerical study of the influence of the non-associativity of the Drucker-Prager model on the plastic limit load and the failure mechanism of the strip footings. The attention is mainly focused on the determination (estimation) of the mechanical fields and geometric characteristics of the collapse mechanism. Rough and smooth contact between the punch and the substrate are considered. Analyses were performed by incremental finite element simulations by using of the object oriented computer code Cast3m. The code is first validated against analytical solutions for two problems available in the literature. It is worth noting that during this validation, we provide new numerical results concerning the ultimate load of a pressurised pore with non-associate matrix. Then, the limit plastic load of the weightless soil is computed and the post-treatment of the numerical results permits one to select the relevant mechanical fields. The main result is that, for the Prandtl mechanism associated to the rough footing, the angle base of the triangular wedge under the footing is independent of the dilatancy angle. This property appears to be very interesting and useful when constructing analytical bounds of the plastic limit load within the framework of limit analysis.
    European Journal of Environmental and Civil Engineering 02/2015; DOI:10.1080/19648189.2015.1005162