西江大桥施工阶段参数灵敏度与可靠度分析  

Analysis of Parameter Sensitivity and Reliability for the Xijiang Bridge Under Construction

作　　者：范学明[1] 苏成[1] 王涛[2] 

机构地区：[1]华南理工大学建筑学院,广东广州510640 [2]华南理工大学交通学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2007年第3期122-126,共5页Journal of South China University of Technology(Natural Science Edition)

摘　　要：采用基于确定性问题基本解、域外奇点技术和多域耦合技术的杆系随机域外奇点法,对西江大桥进行了施工过程中的静力随机分析,考察了不同材料参数与荷载参数的变异对主梁前端挠度影响的灵敏程度.在考虑有关参数变异的情况下,进一步对西江大桥的主梁前端标高控制进行了可靠度分析,考察了不同施工阶段和容许偏差下主梁前端标高控制的失效概率.结果说明了随机域外奇点法在连续刚构桥施工控制应用中的有效性与实用性.A stochastic singular-points-outside-domain （SPOD） method for analyzing beam structures is presented based on the fundamental solutions of certainty problems, the conventional SPOD technique and the multi-domain coupling technique. The proposed method is then applied to the stochastic static analysis of the Xijiang bridge under construction, and the sensitivity of the influences of different material and loading parameters on the deflection of the girder is investigated. Considering the variations of relevant parameters, a reliability analysis is further conducted for the elevation control of the girder of the Xijiang bridge, with the failure probabilities for different construction stages and tolerant errors being also discussed. The results of an application to the Xijiang Bridge show that the proposed stochastic SPOD method is effective and practical in the construction control of continuous rigid-connected bridges.

关 键 词：连续刚构桥 施工控制 随机分析 域外奇点法 灵敏度 可靠度 

分 类 号：TB12[理学—工程力学] U4[理学—力学]