东南大学学报（自然科学版）2016，Vol.46Issue(6)：1271-1277,7.DOI:10.3969/j.issn.1001-0505.2016.06.027
强震下钢筋混凝土连续梁桥非线性动力响应分析
Nonlinear dynamic response analysis of reinforced concrete continuous girder bridge under strong earthquake excitations
摘要
Abstract
To explore the seismic damage evolution and failure history of the continuous girder bridge model,a nonlinear dynamic response analysis was made based on the shaking table test of a scaled 1∶3 bridge model.Collisions between the girder and the abutment and those between the girder and the shear key were discussed to compensate for test results without considering the impact of collision.The analysis results indicate that numerical analysis results are consistent with those from the shaking table array test.The main failure mode of a two-span continuous girder model is the destruction of piers, and the lower cross section of middle pie is the vital place.The bridge model will not collapse under longitudinal shaking on the condition that the acceleration response spectrum of the girder is less than 17.4 m/s2.If the collision between the girder and the abutment is considered,the acceleration of main girder becomes larger,the displacement of main girder becomes less,and the internal forces of pier column will be less.The effects are more significant with the decrease of contact gap.If considering the collision between the girder and the shear key,the acceleration of main girder increases,and the force of pier column increases with the increase of contact gap.This study provides references for sub-sequent anti-collapse design and seismic retrofit of concrete continuous girder bridges.关键词
钢筋混凝土连续梁桥/非线性动力响应分析/振动台试验/地震损伤/倒塌/碰撞Key words
reinforced concrete continuous girder bridge/nonlinear dynamic response analysis/sha-king table test/seismic damage/collapse/collision分类
交通工程引用本文复制引用
黎雅乐,宗周红,黄学漾,夏坚,林元铮..强震下钢筋混凝土连续梁桥非线性动力响应分析[J].东南大学学报（自然科学版）,2016,46(6):1271-1277,7.基金项目
国家自然科学基金资助项目（51378112）、江苏省高校自然科学研究资助项目（15KJD580001）、西南交通大学陆地交通地质灾害防治技术国家工程实验室开放基金资助项目（SWJTU-GGS-2014001）． （）
