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Finite element modelling and seismic behaviour of integral abutment bridges considering soil–structure interaction
, Article European Journal of Environmental and Civil Engineering ; 2018 , Pages 1-20 ; 19648189 (ISSN) ; Maleki, S ; Sharif University of Technology
Taylor and Francis Ltd
2018
Abstract
A comprehensive non-linear finite element (FE) model of integral abutment bridges (IABs) is presented to facilitate the analysis of such bridges using commercial software, especially under seismic loading. The presented model is capable of capturing non-linearity in both the structure and soil, in addition to considering far-field soil response. The model is simple enough to be used for practical purposes. On the other hand, many aspects of seismic behaviour of IABs are unclear, due to complicated soil–structure interaction. Using the presented model, a parametric study is performed to identify the effects of bridge length, abutment type and soil type on seismic behaviour of IABs. Non-linear...
Finite element modelling and seismic behaviour of integral abutment bridges considering soil–structure interaction
, Article European Journal of Environmental and Civil Engineering ; Volume 24, Issue 6 , January , 2020 , Pages 767-786 ; Maleki, S ; Sharif University of Technology
Taylor and Francis Ltd
2020
Abstract
A comprehensive non-linear finite element (FE) model of integral abutment bridges (IABs) is presented to facilitate the analysis of such bridges using commercial software, especially under seismic loading. The presented model is capable of capturing non-linearity in both the structure and soil, in addition to considering far-field soil response. The model is simple enough to be used for practical purposes. On the other hand, many aspects of seismic behaviour of IABs are unclear, due to complicated soil–structure interaction. Using the presented model, a parametric study is performed to identify the effects of bridge length, abutment type and soil type on seismic behaviour of IABs. Non-linear...
On Quantification of Seismic Performance Factors for Integral Abutment Bridges
, M.Sc. Thesis Sharif University of Technology ; Maleki, Shervin (Supervisor)
Abstract
Integral abutment bridges (IABs) are bridges in which the deck is cast monolithically with abutment backwalls. These bridges are also jointless through deck length, due to which they act as a frame in their longitudinal direction. These differences with common seat-type bridge construction, have made IABs more economical to build and maintain and superior in seismic performance. As such, in various countries, this method of construction have been prescribed whenever possible. As an instance, integral construction is mandatory for bridges up to 60 meters in total length in England. IABs have become more of a geotechnical problem rather than simple structural problem of conventional bridges in...
Seismic Behavior of Integral Abutment Bridges
, M.Sc. Thesis Sharif University of Technology ; Maleki, Shervin (Supervisor)
Abstract
Purpose of this research is evaluation of response modification factor for integral abutment bridges in longitudinal direction in which substructure and superstructure both act as a unit system in resisting of lateral loads and no expansion joints are used in them. One of the most important challenges in design of IABs, is lack of response modification factor for their seismic design in longitudinal direction. Another challenge in these bridges, is modeling of soil-bridge structure interaction that affects not only abutment and piles’ seismic performance, but deck performance too. The other challenge is lack of adequate knowledge about their behavior and seismic performance which is of great...
Simplified Modeling of Integral Abutment Bridges for Seismic Analysis and Prediction of Target Displacement Using Displacement Coefficient Method
, M.Sc. Thesis Sharif University of Technology ; Maleki, Shervin (Supervisor)
Abstract
Performance-based design (PBD) has been accepted as one of the most reliable design methods in the past few decades. PBD can overcome inherent deficiencies associated with force-based design (FBD) and has advantages over this traditional method. Various PBD methods have been developed, which Displacement-based design (DBD) has been considered as one of the effective design approaches of the PBD method. In this study, the Displacement coefficient method (DCM) is developed for stub-type integral abutment bridges (IABs). For this purpose, two coefficients are proposed to determine the target displacement of these types of bridges. Validation of this method by nonlinear time-history analysis...
Seismic Performance of Skewed Integral Bridges
, M.Sc. Thesis Sharif University of Technology ; Maleki, Shervin (Supervisor)
Abstract
The purpose of this research is to evaluate skew integral abutment bridges. A bridge with an integral abutment bridge system is a type of bridge in which the expansion joint is removed so the connection between the abutment and the superstructure is rigid. Therefore, the superstructure and the substructure are integrated with each other and both participate in the lateral load of the structure under seismic or thermal forces. One of the important challenges in this type of bridges is the lack of analysis, tests and limited three-dimensional modeling. According to this, the understanding of the behavior of skew integral abutment bridges and the effects of soil-structure interaction in these...
Design of integral abutment bridges for combined thermal and seismic loads
, Article Earthquake and Structures ; Volume 9, Issue 2 , 2015 , Pages 415-430 ; 20927614 (ISSN) ; Maleki, S ; Barghian, M ; Sharif University of Technology
Techno Press
2015
Abstract
Integral abutment bridges have many advantages over bridges with expansion joints in terms of economy and maintenance costs. However, in the design of abutments of integral bridges temperature loads play a crucial role. In addition, seismic loads are readily transferred to the substructure and affect the design of these components significantly. Currently, the European and American bridge design codes consider these two load cases separately in their recommended design load combinations. In this paper, the importance and necessity of combining the thermal and seismic loads is investigated for integral bridges. A 2D finite element combined pile-soil-structure interactive model is used in this...