基于曲率和应变破坏的大跨刚构桥IDA分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
基于北盘江特大预应力混凝土斜腿刚构桥,采用SAP2000建立杆系及杆系-纤维有限元模型,分别以截面曲率和材料应变为损伤指标,采用增量动力分析法(IDA)对结构进行地震响应分析,得到曲率IDA曲线和钢筋、混凝土应变IDA曲线,并对比两类指标的破坏PGA值。结果表明,以材料应变为损伤指标的分析方法结果是准确的,杆系-纤维模型能同时保证计算效率和结果的精确性,适用于实际工程。
Based on Beipanjiang concrete rigid frame bridge,SAP2000 is used to establish rod model and rod-fiber model.According to the damage index of curvature and strain respectively,seismic response analysis is performed using Incremental Dynamic Analysis(IDA),and curvature-IDA curves and strain-IDA curves are obtained.Damage PGA of the two damage indexes is compared.It proves that the method based on strain is accurate and the rod-fiber model is applicable to practical engineering.
引文
[1]Hwang H,刘晶波.地震作用下钢筋混凝土桥梁结构易损性分析[J].土木工程学报,2004:36(7)Hwang H,and Liu J B.Seismic Fragility Analysis of Reinforced Concrete Bridges[J].China Civil Engineering Journal,2004:36(7)(in Chinese)
    [2]闫志刚.高桥墩延性抗震性能研究[D].北京:北京交通大学,2002Yan Zhi-gang.Study on Seismic Ductility of Bridges with High Piers[D].Beijing:Beijing Jiaotong University,2002(in Chinese)
    [3]梁智垚.非规则高墩桥梁抗震设计理论研究[D].上海:同济大学,2007Liang Zhi-yao.Study on Seismic Design Theory of Irregular Girder Bridges with High Piers[D].Shanghai:Tongji University,2007(in Chinese)
    [4]谷音.高墩大跨连续刚构桥梁地震易损性分析[J].地震工程与工程振动,2011,31(2):91~97Gu Yin.Study on Seismic Vulnerability of Long-span Continuous Rigid Frame Bridge with High Piers[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(2):91~97(in Chinese)
    [5]叶爱君.桥梁抗震[M].北京:人民交通出版社,2002Ye Ai-jun.Seismic Design of Bridges[M].Beijing:China Communications Press,2002(in Chinese)
    [6]Mander J B,Priestley M J N and Park R.Theoretical Stress-strain Model for Confined Concrete[J].Journal of The Structural Division,ASCE,1988,114(8):1804~1826
    [7]Ramberg W,Osgood W R.Description of Steel Strain Curve by Parameters[R].Tech.Note902,National Advisory Committee for Aeronautics,1943
    [8]High Way Design Manual[S].California Department of Transportation(Caltrans),2009
    [9]HAZUS99User’s Manual[S].Washington,D C:Federal Emergency Management Agency,1999

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心