桥梁施工控制中的温度应力分析

Analysis of temperature stress in control of bridge construction

温度因素是桥梁施工控制中需要考虑的一项非常重要的结构设计参数.在分析大跨连续桥梁结构产生温度应力原因的基础上,依据基本假定,提出实用的温度应力计算方法.以实际工程为例,采用有限元模型分析和数值模拟的方法,计算非线性温度场引起的桥梁结构截面应力,分析温度变化对桥梁不同施工阶段施工控制的影响.

Temperature factor is a very important structural design parameter to be considered in bridge construction control.Based on the analysis of the causes of temperature stress in long-span continuous bridge structures and the basic assumptions,this paper puts forward a practical method for calculating temperature stress.Finally,taking a practical project as an example,the finite element model analysis and numerical simulation method are used to calculate the cross section stress of the bridge structure caused by the nonlinear temperature field,and the influence of temperature change on the construction control of the bridge in different construction stages is analyzed.