徐变对连续梁桥成桥后的影响及仿真模拟分析

Creep in Completion State of Continuous Beam Bridge and Simulation Analysis

为了分析徐变效应对连续梁桥成桥后的影响,简单分析了混凝土的徐变效应机理和影响因素等,并以某连续梁桥为工程实例,利用有限元软件MIDAS对其进行结构模拟分析,重点对成桥后的徐变效应进行了仿真模拟分析,认为徐变效应对成桥后的主要影响为挠度变化方面,并对比了1985年和2004年两部桥规中的徐变模型的计算结果。

In order to analyze the creep effect on continuous beam bridge in completion state,this paper puts forward the concrete creep effect mechanism and influence factors.And taking a continuous beam bridge as an example,it uses finite element analysis software MIDAS to carry on structure simulation analysis and focuses on the simulation analysis on the creep effects.It is believed the creep effect on bridge in completion state is mainly on the deflection changing.The paper also contrasts calculation results of two bridge creep models proposed in the criterions in 1985 and 2004.