节点文献
基于曲率和应变破坏的大跨刚构桥IDA分析
Incremental Dynamic Analysis of Long Span Continuous Rigid Frame Bridges Based on Destruction of Curvature and Strain
【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。
【Abstract】 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.
【关键词】 地震;
连续刚构桥;
IDA;
损伤指标;
曲率;
应变;
【Key words】 seismic; continuous rigid frame bridge; IDA; curvature; strain;
【Key words】 seismic; continuous rigid frame bridge; IDA; curvature; strain;
【基金】 中央高校基本科研业务专项(2011QN181);贵州省交通厅科技项目
- 【文献出处】 工程抗震与加固改造 ,Earthquake Resistant Engineering and Retrofitting , 编辑部邮箱 ,2013年03期
- 【分类号】U448.23
- 【被引频次】2
- 【下载频次】78