同济大学学报（自然科学版）2023，Vol.51Issue(12)：1845-1858,14.DOI:10.11908/j.issn.0253-374x.23280
采用超高性能混凝土和限位装置的斜拉桥易损性分析
Vulnerability Analysis of an Ultra-High Performance Concrete Cable-Stayed Bridge Equipped with Constraint Devices
摘要
Abstract
Cable-stayed bridges,as crucial joints in transportation networks,of which the towers are vulnerable to experience plastic damage during earthquakes leading to rescue work delay.In this regard,a novel concrete material and a novel constraint device are proposed to enhance the resilience of the cable-stayed bridge system.Beside the new constraint device named SMA(shape memory alloy)cable-based restrainers which were installed in the conventional cable-stayed bridge,the new concrete material named the ultra-high property concrete(UHPC)was casted in the plastic hinges in the tower of the novel cable-stayed bridge system.Two finite element(FE)models of the conventional and innovative cable-stayed bridge systems are established,respectively.A series of far-field and near-field earthquake recorders are used to conduct the vulnerability analysis.The results show that the UHPC material and the SMA cable-based displacement restrainers can improve the resilience of the innovative cable-stayed bridge system with only a slight increase in cost,expanding the application scenarios of the UHPC and the SMA cable-based restrainer.关键词
超高性能混凝土/形状记忆合金(SMA)耗能限位装置/斜拉桥模型/易损性分析Key words
ultra-high performance concrete/SMA(shape memory alloy)energy consumption and displacement constraint device/cable-stayed bridge model/vulnerability analysis分类
交通工程引用本文复制引用
郑越,王宇霄,郭军军,李方元..采用超高性能混凝土和限位装置的斜拉桥易损性分析[J].同济大学学报（自然科学版）,2023,51(12):1845-1858,14.基金项目
国家自然基金(51978513) （51978513）
