摘要
基于确定性问题基本解,利用域外奇点技术和多域耦合技术,提出了杆系随机域外奇点法。采用该法对施工过程中的斜拉桥进行了静力随机分析,考察了不同材料参数与荷载参数的变异对主梁挠度、塔顶位移与斜拉索索力影响的灵敏程度。在考虑有关参数变异情况下,进一步提出了主梁标高控制可靠度的概念,并给出相应的分析方法。实桥算例显示了本文方法在斜拉桥施工控制应用方面的科学性与实用性。
Based on the conventional fundamental solutions, a stochastic singular-points-outside-domain method is proposed by jointly using the singular-points-outside-domain and the multi-domain coupling techniques. The proposed method is applied to the stochastic analysis of cable-stayed bridges during erection. A sensitivity study is conducted for the effects of different material and loading parameters on the deflections of the girder, the displacements at the top of the towers and the cable forces. The concept of reliability is proposed for elevation control of the bridge girders, with variations of relevant parameters being taken into consideration, and an analysis method presented correspondingly. Application to the Yamen Cable-stayed Bridge illustrates the success of the method in the construction control of cable-stayed bridges.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第10期81-87,共7页
China Civil Engineering Journal
关键词
斜拉桥
施工控制
随机分析
灵敏度
可靠度
cable-stayed bridge
construction control
stochastic analysis
sensitivity
reliability
