摘要
采用响应面法对三塔悬索桥主梁最大挠度进行静力可靠度分析,考察三塔悬索桥主梁最大挠度对结构材料、几何尺寸及外荷载等不确定因素的变异而发生变化的规律。结果表明:三塔悬索桥主梁最大挠度可靠指标是由单主跨施加活荷载控制的,主缆弹性模量、汽车活荷载、主缆截面面积及中塔弹性模量等对主梁最大挠度的影响最为显著。
Static reliability analysis was carried out for the maximum deflection of main girder of three-tower suspension bridge by response surface method（RSM）.The law of main girder＇s deflection was studied with the variation of structural parameters such as material properties,geometric dimensions and external load,etc.The results demonstrate that the static deflection reliability was controlled by the load case when the live load was uniformly distributed on one central span girder.It was concluded that the variation of modulus of the main cable,the live load,the area of the main cable and the modulus of the central tower had significant effect on the deflection of main girder of three-tower suspension bridge.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2011年第5期895-898,942,共5页
Journal of Chongqing Jiaotong University(Natural Science)
基金
国家自然科学基金资助项目(51008223)
上海市浦江人才计划项目(09PJ1409500)
关键词
悬索桥
挠度
静力可靠度
失效概率
响应面法
suspension bridge
deflection
static reliability
failure probability
response surface method
