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- Title
Damage Research and Bearing Parameter Analysis of Simply Supported Beam Bridge Under Strong Earthquake.
- Authors
YUE Weiqin; YOU Sifang; ZHENG Shixiong; JIA Hongyu; CHEN Kedao; WU Rui
- Abstract
With the development of Western China and urbanization, more and more bridges are close to or even across active faults, which are significantly affected by fault ground motion. In order to simulate the collapse process of a simply supported beam bridge under strong earthquakes, a three-dimensional finite element model of the bridge was established based on LS-DYNA platform. Through the analysis of bridge collapse and seismic response, the damage mechanism of simply supported beam bridge under strong earthquake is studied, and the influence of bearing shear stiffness on the collapse process and seismic response of simply supported beam bridge is analyzed. Research shows: The collapse failure mode of simply supported beam bridge under earthquake is mainly the insufficient bearing capacity of piers caused by the large-area failure of concrete at the bottom of piers, which leads to the collapse of the whole bridge. With the continuous action of seismic load, the piers of simply supported beam bridges go through normal operation stage, damage evolution stage and collapse stage in turn. Increasing the shear stiffness of the bearing will increase the duration of the damage evolution stage of the pier. The increase of the shear stiffness of the support increases the constraint between the beam and the pier, reduces the deformation of the support, and reduces the displacement response of the simply supported beam bridge and the collision effect between the beams. The seismic response of bridges without unit failure is greater than that of bridges with unit failure, and the seismic response of bridges becomes larger and larger with unit failure.
- Publication
Railway Standard Design, 2023, Vol 67, Issue 12, p128
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202206200005