摘要
通过对一座三跨预应力混凝土连续梁桥悬臂施工过程最大悬臂状态进行可靠度分析,并建立相应的可靠度分析模型。计算结果表明梁体的倾覆稳定性可靠指标不满足目标值,通过对功能函数中各个随机变量进行参数敏感性分析,从中找出对可靠指标影响最大的随机变量,最后对该随机变量进行进一步分析,确定参数取值范围,进而对实际施工过程中的临时固结措施进行调整,使梁体倾覆稳定性可靠指标达到目标值。
Three-span prestressed concrete continuous beam bridge,which was constructed by cantilever construction,was analysised in reliability in construction on the most unfavorable case and the model was built.The calculation results show that the stability of beam body reliable index is not meet the target reliability index,through to the functions of various random variable parameters sensitivity analysis,finding out the biggest influence on reliability index of the random variable,and finally,the random variable for further analysis,to determine the parameter value range,then the actual construction process of temporary consolidation measures to adjust,and beam body stability reliability index was achieved.
出处
《公路工程》
北大核心
2013年第3期162-164,共3页
Highway Engineering
关键词
连续梁桥
悬臂施工
功能函数
可靠指标
临时固结
continuous beam bridge
cantilever construction
performance function
reliability index
Temporary consolidation
