Modelling of shear keys in bridge structures under seismic loads

Bi, Kaiming; Hao, Hong

doi:10.1016/j.soildyn.2015.03.013

Cited by 37 publications

(9 citation statements)

References 25 publications

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“…In fact, many researchers (e.g. Bi and Hao, 2015; Están et al, 2017; Jiang et al, 2019; Kang et al, 2017; Kun et al, 2017; Xiang and Li, 2016; Yang et al, 2019) did not consider the influence of SSI when investigating seismic behavior of bridges with considering pounding or track system.…”

Section: Methodsmentioning

confidence: 99%

“…Previous studies on the effect of pounding at shear keys on the seismic responses of bridges were mainly focused on highway bridges. Wu et al (2018) and Bi and Hao (2015) performed numerical investigations on the influence of shear keys on seismic behavior of small-to-medium-span highway bridges and concluded that neglecting shear keys in seismic analyses of bridges may result in inaccurate predictions of seismic responses in bridge substructures. Están et al (2017) evaluated the influence of external shear keys on the bridge seismic behavior and concluded that the most vulnerable bridge is that without considering shear keys.…”

Section: Introductionmentioning

confidence: 99%

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Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Meng

Chen

Yang

et al. 2021

Advances in Structural Engineering

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China railway track system II (CRTS-II) slab ballastless track is usually constructed on high-speed railway (HSR) bridges to ensure the rail smoothness and the running safety of high-speed trains, but the use of the longitudinal continuous track system would significantly alter the dynamic characteristics of the bridges and therefore influence the bridge seismic responses. The pounding at shear keys has also been identified as one of the critical factors affecting the seismic behavior of bridges. To investigate the effects of shear keys and CRTS-II track system on the seismic behavior of HSR simply-supported bridges subjected to transverse earthquake excitations, detailed 3D finite element models are developed by using ABAQUS. The seismic responses calculated from the bridges with and without considering shear keys are firstly compared. The result shows that the shear keys can effectively limit the development of pier-girder relative displacement and thus decrease the potential of girder dislocation. However, large pounding forces would be generated between the shear keys and bearing pads and transferred to bridge piers, which will amplify the seismic responses of the bridge piers. The result of seismic analyses of multiple-span simply-supported bridges with and without considering the track system shows that the track system will significantly influence the distribution of seismic forces among the bridge spans. For a bridge with equal pier heights, considering the track system will reduce the seismic responses of side spans (close to subgrade) but will increase those of the middle spans. Whereas an opposite trend is found for bridges with high middle piers and short side piers.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Meng

Chen

Yang

et al. 2021

Advances in Structural Engineering

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“…In this sense, there are some works of specific aspects of the behavior of RC bridges using the multi-scale technique that are solved with explicit codes (Li et al, 2017; Hu et al, 2017). Some authors consider a full 3D model of bridges including concrete nonlinearity and erosion criteria, but focus their analysis on specific phenomena such the pounding effect or unseating of the superstructure (Bi et al, 2013; Bi and Hao, 2013, 2015; He et al, 2017; Lin et al, 2021). On the other hand, Lin et al (2020a, 2020b) developed a full nonlinear 3D model of a three-span steel-concrete composite bridge by using LS-DYNA and validated by experimental test, in which a damage scalar concrete model is included.…”

Section: Introductionmentioning

confidence: 99%

Comparative nonlinear seismic analysis of an existing RC bridge designed with obsolete codes

Nanclares

Curadelli

2022

Advances in Structural Engineering

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The evolution of seismic design and calculation criteria for highway bridges has a direct influence on their structural behavior. This paper presents a nonlinear dynamic analysis using a detailed 3D finite element model of an existing bridge, with different design criteria for the column transverse reinforcement, according to code requirements of different times. The numerical model is able to simulate both the collapse of the structure and the generation of damage in its elements when subjected to extreme seismic actions. Through the numerical model, it is possible to represent the cyclic behavior of the concrete, and to evaluate the influence of the transverse reinforcement assigned to the column on the overall response of the bridge. The formation of plastic hinges is verified, as well as the identification of different collapse mechanisms.

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“…Currently, FEM is one of the most commonly used methods of simulating the collapse process of bridges [3][4][5]. A detailed 3D FE model elaborately simulated the damage location and the local failure mechanism of highway bridges [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Seismic Collapse Analysis of RC Highway Bridges Based on a Simplified Multiscale FE Modeling Approach

Han

et al. 2017

Shock and Vibration

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Multiscale finite element (FE) modeling offers a balance between computational efficiency and accuracy in numerical simulations, which is appropriate for analysis of seismic collapse of RC highway bridges. Some parts of structures that need detailed analysis can be modeled by solid elements, while some subordinate parts can be simulated by beam elements or shell elements to increase the computational efficiency. In the present study, rigid surface coupling method was developed to couple beam elements with solid elements using the LS-DYNA software. The effectiveness of this method was verified by performing simulation experiments of both a single-column pier and a two-span simply supported beam bridge. Using simplified multiscale FE modeling, analyses of collapse and local failure of a multispan simply supported beam bridge and a continuous rigid frame bridge were conducted to illustrate the approach in this paper. The results demonstrate that the simplified multiscale model reasonably simulates the collapse process and local damage of complex bridges under seismic loading.

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Modelling of shear keys in bridge structures under seismic loads

Cited by 37 publications

References 25 publications

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Effects of shear keys and track system on the behavior of simply-supported bridges for high-speed trains subjected to transverse earthquake excitations

Comparative nonlinear seismic analysis of an existing RC bridge designed with obsolete codes

Seismic Collapse Analysis of RC Highway Bridges Based on a Simplified Multiscale FE Modeling Approach

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