基于振动台试验的空心桥墩地震易损性分析  

Seismic Vulnerability Analysis of Hollow Pier Based on Shaking Table Test

作　　者：申彦利[1,2] 陈伟湖 SHEN Yanli;CHEN Weihu(chool of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056038,China;Hebei Provincial Research Center of Assembly Structural Engineering Technology,Handan,Hebei 056038,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]河北省装配式结构工程技术研究中心,河北邯郸056038

出　　处：《公路工程》2021年第2期34-40,共7页Highway Engineering

基　　金：国家自然科学基金项目(51378169);河北省高等学校科学技术研究重点项目(ZD20161470)。

摘　　要：为有效评估钢筋混凝土矩形空心桥墩的损伤状态,基于空心桥墩的振动台试验结果,结合有限元数值模拟,利用考虑墩顶相对位移的损伤指标,以地面峰值加速度PGA为地震动强度参数,对钢筋混凝土矩形空心桥墩进行增量动力分析。由此,获得空心桥墩在不同峰值加速度作用下发生某种损伤的超越概率曲线,对桥墩进行损伤评估。研究结果表明:考虑墩顶相对位移的损伤指标能够对钢筋混凝土空心桥墩的损伤程度作出有效评估,通过超越概率曲线可以直观地判断出桥墩发生某种破坏状态的概率。本研究对钢筋混凝土矩形空心桥墩的抗震性能设计以及损坏评估修复具有一定的参考价值。In order to effectively evaluate the damage status of reinforced concrete rectangular hollow piers,based on the shaking table test results of hollow piers and the finite element numerical simulation,the incremental dynamic analysis of reinforced concrete rectangular hollow piers was carried out with the ground peak acceleration PGA as the seismic intensity parameter,taking the relative displacement of the pier top as the damage index.Thus,the probability curve of damage of hollow pier under different peak acceleration was obtained,and the damage assessment of pier was carried out.The results show that the displacement damage index considering the relative displacement of pier top can effectively evaluate the damage degree of reinforced concrete hollow pier,and the probability of certain failure state of pier can be directly judged by the transcendental probability curve.This study has certain reference value for seismic performance design and damage assessment and repair of reinforced concrete rectangular hollow pier.

关 键 词：矩形空心桥墩 振动台试验 易损性分析 损伤评估 

分 类 号：U442.5+5[建筑科学—桥梁与隧道工程]