刚构-连续组合梁桥施工期可靠性分析

为研究刚构-连续组合梁桥施工期结构的可靠性,以跨广珠西线特大桥为工程背景,根据施工期预应力混凝土刚构-连续组合梁桥悬臂施工的特点,建立了悬臂施工中结构抗力和荷载效应概率模型,基于JC法分两种工况对该结构进行了施工期可靠性分析,分析了已浇梁段、施工分布活载、混凝土强度、风荷载及施工荷载偏差等因素对可靠度影响程度,研究结论可为该类型桥梁结构制定合理的施工措施提供参考。

Analysis on Reliability of Rigid Frame-Continuous Composite Girder Bridge during Construction Period

In order to study the structural reliability of the rigid frame-continuous composite girder bridge during the construction period,taking the grand bridge spanning Guangzhou-Zhuhai West Line as the engineering background,and based on the characteristics of cantilever construction of the pre-stressed concrete rigid frame-continuous composite girder bridge during construction period,the probability model of structural resistance and load effect in cantilever construction is established.Based on the JC method,the reliability of this structure during the construction period is analyzed by two construction conditions to analyze the influence of casted girder section,construction distribution of live load,concrete strength,wind load and construction load deviation on the reliability.The study conclusions can provide the reference for formulating the reasonable construction measures for this type of bridge structure.