混凝土箱梁温度作用的参数分析

Parametic Analysis of Concrete Box-girder Thermal Action

根据非稳态导热偏微分方程,施加合适的边界条件,用有限元法进行了混凝土箱梁温度场的参数分析,并确定了影响混凝土箱梁温度场的主要因素。研究表明,混凝土箱梁的截面尺寸、所用混凝土的热物理性质以及气温对混凝土箱梁的竖向最大温度的影响均不大,对混凝土箱梁竖向温度梯度影响最大的是太阳辐射强度。

Based on the unsteady heat conduction differential equation,appropriate boundary conditions were enforced and parametic analysis of concrete box-girder thermal action was performed. The research indicates that section dimension,the heat conduction characteristics of concrete box-girder has little influence on the vertical maximum temperature of concrete box-girder,but solar irradiance influences strongly the vertical maximum temperature of concrete box-girder.