防灾减灾工程学报2011，Vol.31Issue(6)：682-687,6.
地震作用下大跨度悬索桥几何非线性影响分析
Analysis of Geometric Nonlinear Effects on Long-span Suspension Bridges Subjected to Earthquakes
摘要
Abstract
Geometric nonlinearity of long-span suspension bridge mainly comes from three aspects:the cable sag effect, the beam-column effect and the large displacement caused by large changes in the structural geometry. Considering the particularity of seismic ground motions, the amplitudes of high-frequency components of which are usually larger than the low-frequency components, it is difficult to make qualitative judgments of the effects of geometric nonlinearity for the long-span suspension bridge under earthquakes. The existing research about the effects of geometric nonlinearity on the long-span bridges focuses on the cable-stayed bridges,and conflicting results can be seen. In this paper, the comparative analysis of the effects of geometric nonlinearity on two typical symmetric and asymmetric long-span suspension bridges are carried out under seismic ground motions with progressively increased magnitudes for four types of sites. The levels of the geometric nonlinear effects on the responses of long-span suspension bridges and corresponding reasons are investigated and some suggestions are offered.关键词
地震作用/大跨度悬索桥/几何非线性Key words
earthquake/long-span suspension bridge/geometric nonlinearity分类
数理科学引用本文复制引用
聂利英,李硕娇,殷玉梅..地震作用下大跨度悬索桥几何非线性影响分析[J].防灾减灾工程学报,2011,31(6):682-687,6.基金项目
江苏省自然科学基金项目(BK2005110)、江苏省“青蓝工程”项目(2008)、河海大学中央高校基本科研业务费项目(2009)资助 （BK2005110）
