Journal of the Croatian Association of Civil Engineers
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Journal of the Croatian Association of Civil Engineers
#1
Journal of the Croatian Association of Civil Engineers

Size: - | Format: PDF | Quality: Original preprint | Publisher: HSGI - Croatian Association of Civil Engineers | ISSN: (printed version): 0350-2465, (electronic version): 1333-9095

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Papers from Journal of the Croatian Association of Civil Engineers




Analysis of possible use of pyrolytic products as binders in asphalt mixes

  • Author(s): Lidija Avsenik, Marjan Tušar
  • Published By: GRAĐEVINAR
  • Published Year: 3/2016
  • DOI: 10.14256/JCE.1305.2015
  • Size: 284 KB
  • Quality: Scanner
  • Abstract: New binders are produced in order to reduce dependence on crude oil. This study aims to evaluate pyrolytic products and their blends with bitumen, as a possible substitution for bitumen. Bitumen of the penetration grade 70/100 was used as a matrix for the blends. Standard test were conducted in order to determine mechanical properties of the reference bitumen, pyrolytic products, and their blends.
    The results obtained during this study indicate that pyrolytic products can be used as a substitution for bitumen originating from crude oil or, in proper proportions, as an additive to that bitumen.

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#2
Deformation characteristics of aluminium alloys
  • Author(s): Mitar Mišović, Nebojša Tadić, Duško Lučić
  • Published By: GRAĐEVINAR
  • Published Year: 3/2016
  • DOI: 10.14256/JCE.1457.2015
  • Size: 520 KB
  • Quality: Unspecified
  • Abstract:
    The utilisation of aluminium alloys in structural applications requires knowledge of their characteristics in the elastoplastic area. The deformation of alloys in this area can be described by the Ramberg-Osgood's equation. Tensile test results for AW-5083 and AW-2024 alloys are presented, and it is confirmed that strain hardening can reliably be described with Hollomon equation. Ramberg-Osgood equations are derived for these two alloys based on strain hardening indicators.


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#3
Performance evaluation of reinforced concrete buildings with softer ground floors

  • Author(s): R. Tuğrul Erdem
  • Published By: GRAĐEVINAR
  • Published Year: 1/2016
  • DOI: 10.14256/JCE.1133.2014
  • Size: 2,07 MB
  • Quality: Unspecified
  • Abstract:
    Determination of seismic performance is a significant task in the performancebased seismic analysis of structures. The consistency between analysis results obtained according to various codes is highly significant for seismic evaluation of structures. Non-linear performance of three reinforced concrete buildings having a soft storey irregularity is studied based on the finite elements analysis according to FEMA-356, FEMA-440, and Turkish Earthquake Code - 2007. Damage situations, modal properties, storey drift ratios, and global performance levels are comparatively presented for each structure, and appropriate suggestions are given.


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#4
Condition assesment of concrete pier after three decades of exposure to sea water
  • Author(s): Dubravka Bjegović, Marijana Serdar, Ana Baričević, Marija Jelčić Rukavina
  • Published By: GRAĐEVINAR
  • Published Year: 12/2015
  • DOI: 10.14256/JCE.1188.2014
  • Size: 564 KB
  • Quality: Unspecified
  • Abstract: This paper presents the effects of long-term exposure of concrete structures to marine environment using as an example concrete blocks of a pier exposed to seawater for more than three decades. The blocks were tested to determine their mechanical characteristics (compressive strength), durability (gas permeability and capillary absorption), homogeneity (sclerometer rebound and ultrasound passage velocity) and chemical properties (quantity of chloride and sulphate ions). In addition, concrete behaviour in sea water was modelled using software packages Stadium and Conclife.


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#5
Shape optimisation of concrete open spandrel arch bridges

  • Author(s): Majid Pouraminian, Mohsen Ghaemian
  • Published By: GRAĐEVINAR
  • Published Year: 12/2015
  • DOI: 10.14256/JCE.1223.2015
  • Size: 576 KB
  • Quality: Unspecified
  • Abstract: An open spandrel arch bridge is analysed in this paper. A computer code is written to create a model from geometrical data, so as to solve the optimisation problem. An optimum design procedure is conducted in the paper, and the total material volume of the bridge substructure is adopted as an objective function. The substructure includes the column and the reinforced-concrete arch. Finally, the optimization technique is implemented using the Simultaneous Perturbation Stochastic Approximation algorithm.


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#6
Load-bearing capacity of fire exposed composite columns

  • Author(s): Milivoje Milanović, Meri Cvetkovska, Petar Knežević
  • Published By: GRAĐEVINAR
  • Published Year: 12/2015
  • DOI: 10.14256/JCE.1329.2015
  • Size: 740 KB
  • Quality: Unspecified
  • Abstract: The cross-section load-bearing capacity of three types of fire exposed steel-concrete composite columns is analysed in this paper, and the results are compared with the load-bearing capacity of a reference reinforced-concrete column. Mechanical properties of constitutive materials are reduced considerably by high temperatures caused by fire action, which results in a reduced load bearing capacity of columns with regard to the longitudinal force and biaxial bending moment. The reduced load bearing capacity of analysed columns subjected to elevated temperatures is expressed through changes in the M-N interaction curves.


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#7
Reliability and punching shear resistance of slabs in non linear domain

  • Author(s): Kernou Nassim, Youcef Bouafia, Belakhdar Khalil
  • Published By: GRAĐEVINAR
  • Published Year: 11/2015
  • DOI: 10.14256/JCE.1295.2015
  • Size: 672 MB
  • Quality: Unspecified
  • Abstract: In this paper, the punching shear resistance of slabs is numerically evaluated and compared to predictions specified in some design codes. The interaction of major parameters that affect the punching shear behaviour and failure mode of slabs is also studied. Reliability analysis results are presented in terms of the reliability index for various levels of Pu/Pflex. In addition to the reliability analysis, the sensitivity
    analysis is carried out in terms of different load levels so as to study the effect of main variables on the results.


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#8
RC beam strengthening using precast RC plate bonding technique

  • Author(s): Ali Demir, Muhiddin Bağcı, Muhammed Tekin, Ayhan Nuhoğlu
  • Published By: GRAĐEVINAR
  • Published Year: 11/2015
  • DOI: 10.14256/JCE.1227.2015
  • Size: 812 KB
  • Quality: Unspecified
  • Abstract: The behaviour of RC beams strengthened with precast RC plates of rectangular and U cross-section is studied in the paper. An experimental investigation was conducted to assess effectiveness of strengthening with precast plates. The investigation was supported with the 2-D nonlinear finite element analysis (NLFEA). The NLFEA results showed a good level of correlation with test results. The proposed technique is considered to be a good alternative to RC jacketing and the technique is practical, economical and reliable for buildings or bridges with a greater number sisof similar beams


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#9
Influence of spatial variability of ground motion on seismic response of bridges

  • Author(s): Marta Šavor Novak, Damir Lazarević, Josip Atalić
  • Published By: GRAĐEVINAR
  • Published Year: 10/2015
  • DOI: 10.14256/JCE.1303.2015
  • Size: 708 KB
  • Quality: Unspecified
  • Abstract: An approach to seismic analysis of bridges under spatially variable ground motions is
    presented. The phenomenon of spatial variability of earthquakes, its effects on bridge
    response, and differences with respect to simultaneous excitation of supports, are
    explained. The model of such excitation is described in detail, and procedures for generation
    of spatially variable ground motions are outlined. Numerical analysis methods, efficient
    for solving this problem, are also presented. The described methodology is applied in the
    seismic analysis of an arch bridge. The analysis results show that the spatial variability of
    ground motions has a detrimental effect on most of the analysed bridge response values.


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#10
Numerical model for analysis of stress-ribbon bridges

  • Author(s): Jure Radnić, Domagoj Matešan, Domagoj Buklijaš-Kobojević
  • Published By: GRAĐEVINAR
  • Published Year: 10/2015
  • DOI: 10.14256/JCE.1383.2015
  • Size: 1,09 MB
  • Quality: Unspecified
  • Abstract: A newly developed numerical model for the analysis of stress-ribbon bridges under the short-term (static and dynamic) and long-term loads and actions is presented in the paper. The model can simulate main nonlinear effects of the behaviour of these structures, including nonlinear behaviour of materials, change in the structure geometry, phased construction, prestressing, etc. Basic solutions for the stress-ribbon bridge over the Cetina River near Zadvarje, and some results of its analysis using the developed numerical model, are presented.


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