脉冲型长周期地震动下基础隔震结构主要失效模式研究  

Study on Main Failure Modes of Base-Isolataed Structures under Long-period Pulse-like Ground Motion

作　　者：王亚楠 彭斌 于娇 王傅杰 Wang Yanan;Peng Bin;Yu Jiao;Wang Fujie(Xi'an University of Technology,710021,China)

机构地区：[1]西安工业大学,710021

出　　处：《特种结构》2022年第3期93-96,共4页Special Structures

基　　金：国家自然科学基金(51808423);陕西省自然科学基础研究计划(2019JQ-837)。

摘　　要：针对近断层脉冲型地震动作用下基础隔震结构的地震损伤和失效模式进行研究。建立隔震结构的数值计算模型,进行非线性动力时程分析;选择适用于隔震结构的地震损伤模型,进行结构的构件和整体损伤分析;确定隔震结构构件的失效准则,并采用多指标综合评价法进行隔震结构的主要失效模式分析。结果表明:脉冲型长周期地震动作用下隔震结构的损伤主要集中在一、二层,其中底层中柱先于梁发生损伤失效,而当隔震支座失效时,上部结构底层构件几乎全部失效。In this paper,the seismic damage and failure modes of base-isolated structures under near-fault pulse-like ground motion are studied.The numerical calculation model of the base-isolated structure is estab-lished,and the nonlinear dynamic time history analysis is carried out.The proper seismic damage model for the base-isolated structure is then selected to analyze the structural member damage and the overall damage.The failure criteria of the base-isolated structural member are determined,and the main failure modes of the base-i-solated structure are analyzed with the multi index comprehensive evaluation method.The results show that un-der the action of long-period pulse-like ground motion,the damage of the base-isolated structures is mainly con-centrated on the first and second floors.The middle column on the ground floor is damaged and failed before the beam.When the isolation bearing fails,almost all the bottom members of the superstructure fail.

关 键 词：基础隔震结构 近断层脉冲型地震动 地震损伤 失效模式 

分 类 号：TU352.12[建筑科学—结构工程]