摘要
本文介绍了目前斜拉桥非线性地震反应的研究现状,利用MSC/NASTRAN的非线性分析计算方法对天津永和斜拉桥结构的几何大变形非线性影响、抗震支座(拉索、挡块)的非线性影响、拉索预张拉影响以及重力-水平位移相互作用的非线性影响进行了数值分析和讨论.
Different sources of nonlinearity for cable stayed bridges are investigated. Nonlinearities can be due to:(1)changes of geometry of the whole bridges owing to its large displacement and large rotation, ( 2 ) axial force and bending moment interaction, ( 3 ) effects of cables caused by pretentioning, ( 4 ) dynamic interaction of gravity and horizontal displacement, ( 5 ) some seismic mitigating devices. The effects of each above mentioned nonlinearity on the seismic behaviour of Tianjin Yonghe cable-stayed bridge are studied in this paper by using MSC/NASTRAN. Many important conclusions are obtained.
出处
《土木工程学报》
EI
CSCD
北大核心
1997年第3期16-22,共7页
China Civil Engineering Journal
关键词
斜拉桥
地震反应
非线性
减震设施
预应力
cable-stayed bridges, earthquake response, nonlinearity, seismic mitigating devices, pretensioning, dynamic interaction of gravity and horizontal displacement, MSC/NASTRAN.
