大跨径自锚式斜拉-悬索协作体系桥非线性随机静力分析  

Nonlinear stochastic static analysis of long span self-anchored cable-stayed suspension bridge

作　　者：朱巍志[1] 张哲[1] 潘盛山[1] 

机构地区：[1]大连理工大学桥梁工程研究所,辽宁大连116024

出　　处：《大连理工大学学报》2010年第6期958-962,共5页Journal of Dalian University of Technology

基　　金：交通部西部交通建设科技项目(200631882350)

摘　　要：自锚式斜拉-悬索协作体系桥综合了斜拉桥和自锚式悬索桥的特点,完全取消了庞大的锚碇,为深海软基建设大跨径桥梁提供了一种理想方案.对自锚式斜拉-悬索协作体系桥进行了确定性非线性分析并应用响应面法进行了非线性随机静力分析,算例研究结果表明,各种随机变量的变异对自锚式斜拉-悬索协作体系桥响应影响规律不同,同其他随机变量相比,主缆弹性模量和截面面积的变异对桥梁跨中挠度影响最为显著,其次是钢主梁参数,而吊杆参数的变异对其影响可以忽略不计.Self-anchored cable-stayed suspension bridge combines both merits of self-anchored suspension bridge and cable-stayed bridge,cancels the huge anchorage and provides a better example for other similar construction of huge span bridges under deep-sea soft foundation conditions.The deterministic nonlinearity is analyzed and response surface approach is utilized to analyze nonlinear stochastic static of self-anchored cable-stayed suspension bridge.The results of this example show that the variation of the stochastic variables has a different influence on the structural responses of self-anchored cable-stayed suspension bridge.Compared to other stochastic variables,the variation of elastic modulus and cross-sectional area of main cable has a significant influence on the deflection of selfanchored cable-stayed suspension bridge at the middle of span,and the variation of parameters of steel girder has some effects and the variation of parameters of suspender has little effect on the deflection.

关 键 词：自锚式斜拉-悬索协作体系 几何非线性 随机静力分析 响应面法 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]