摘要
本文基于在MSC.Marc中加入纤维模型编制的THUFIBER程序的基础上,分别采用纤维模型和三维实体单元模型模拟桥墩和上部结构,建立高墩大跨连续刚构桥有限元模型。同时,采用2008年汶川地震波,分析了行波效应对四川某高墩大跨连续刚构桥非线性地震反应的影响。结果表明:行波效应对高墩桥的墩顶位移和墩底剪力影响较大,墩顶位移减小了20%—50%;而墩底剪力增大了20%—30%。
In this paper, with application of THUFIBER program, fiber model is used to simulate bridge piers and solid element is used to simulate the superstructure in program MSC.Marc. The effects of traveling wave on the nonlinear seismic response of long-span continuous rigid-frame bridge with high piers are analyzed under 2008 Wenchuan earthquake wave excitation. Out results show that traveling wave has a great effect on displacement and shear force of high piers of the bridge. The displacement of top of pier decreases 20% to 50% and shear force at base of pier increases 20% to 30%.
出处
《震灾防御技术》
2009年第3期312-320,共9页
Technology for Earthquake Disaster Prevention
基金
国家自然科学基金项目(90715032
50808105)资助
关键词
大跨度桥梁
纤维模型
地震响应
行波效应
高墩
Long-span bridge
Fiber model
Seismic response
Traveling wave effect
High pier
