计算力学学报Issue(4)：486-494,9.DOI:10.7511/jslx201404012
考虑地震动多点激励与材料应变率效应的主跨300m 级独塔斜拉桥弹塑性分析
Study on steel strain-rate and multiple earthquake motions effect on elasto-plasticity responses of 300 m span single tower cable-stayed bridge
摘要
Abstract
Firstly ,the 3D finite element model of single tower cable-stayed with a main span of 300 m is established using software MIDAS/Civil .A visual interface program named Civil2MARC for transfor-ming the finite model from MIDASCivil to MSC .MARC is developed ,and then the MIDAS model is transformed to MSC .MARC using the Civil2MARC .The consistency between the MIDAS and MARC fi-nite model is compared to verify the accuracy of the interface program Civil2MARC .While ,a visual pro-gram named MEMS_b is developed based on power spectra of ground is briefly introduced here .Further , the advantage of the displacement-velocity model is explicitly addressed ,and the model is further applied to the cable-stayed bridge through the software MSC .MARC .Finally ,to study the influence of multi-supported ground motions and material strain-rate on seismic response under earthquake motions ,the subroutine considering strain-rate effect of steel and concrete is used to analyze the dynamic responses in-cluding weak parts ,elasto-plastic response and so on .The results show that (1) The visual program Civ-il2MARC developed in this paper is characterized with convenient operation ,stable running ,high effi-cient transforming process and reliable transforming results .(2) The visual program MEMS_b developed in this paper has friendly user interface ,flexible assignment and direct post-processing results display . (3) the displacement-velocity model is more reasonable and can be easily complemented through MSC . MARC .(4) The influence law strain-rate and multi-point earthquake motions effect on the plastic hinges occurrence location ,time and final distribution of the cable-stayed bridge is analyzed and given .T his pa-per involves theory model ,program developing and engineering numerical computation ,and can provide reference for revlevant engineering .关键词
斜拉桥/MIDAS/Civil2MARC/MSC .MARC/多点地震动/弹塑性/应变率Key words
cable-stayed bridge/MIDAS/Civil2MARC/MSC .MARC/multi-point earthquake motion/elas-to-plasticity/strain-rate分类
天文与地球科学引用本文复制引用
柳国环,陆新征,国巍,李敏,孙雪艳,吕伟荣,全伟..考虑地震动多点激励与材料应变率效应的主跨300m 级独塔斜拉桥弹塑性分析[J].计算力学学报,2014,(4):486-494,9.基金项目
国家自然科学重点基金（90815025）；国家自然科学基金（51178249，50938008，51108466）；中国博士后科学基金（2011M500332）资助项目． （）
