摘要
郑东新区龙湖区北三环跨西运河桥为不对称独塔双索面预应力混凝土双边箱斜拉桥,全长225 m(40 m+109 m+70 m),采用塔、墩、梁固结体系。采用CSI SAP2000结构分析软件建立三维有限元模型对该桥进行非线性时程分析。分析结果表明:该桥在E1地震下结构安全储备足够,而在E2地震下安全储备小于1.0,通过变更设计对结构的抗震性能进行了改善。
The Western Canal Crossing Bridge on Northern Third Ring road in Longhu District of Zhengdong New District is an asymmetrical single-tower double cable plane prestressed concrete double side box cable-stayed bridge at total length 225m（ 40 m ＋ 109 m ＋ 70m） and adopts tower,pier and beam consolidation system. This paper establishes a 3D finite element model by means of CSI SAP2000 structure analysis software to carry out nonlinear time-procedure analysis for the bridge. The Results of analysis show that safety redundancy of structure of the bridge are enough under E1 earthquake,while are less than1. 0 under E2 earthquake,and the seismic performance of structure is improved through change of structure.
出处
《公路交通技术》
2016年第3期58-61,共4页
Technology of Highway and Transport
关键词
斜拉桥
抗震分析
结构设计
非线性
cable-stayed bridge
seismic analysis
structural design
nonlinear
