钢管混凝土拱桥温度内力计算时温差取值分析

Analysis of thermal difference magnitude in thermal lnner force calculation of CFST arch bridge

提出钢管混凝土拱桥计算合拢温度的概念 ,进行了钢管混凝土构件截面温度场测试和钢管混凝土拱桥温度变化值的计算机分析。分析结果认为 ,钢管混凝土拱桥的计算合拢温度主要取决于管径和管内混凝土浇筑后一个月内的平均温度以及空钢管合拢温度。

The concept of calculation closure temperature of CFST arch bridge is presented,the tests of the thermal field of CFST columns and computer numerical analysis of the thermal change magnitude of CFST arch bridges are carried out.With the results amplified,the calculation closure temperature of CFST arch bridge depends mainly on the diameter of the tube,the average temperature of the month after the concrete in the tube is filled as well as the closure temperature of the hollow steel tube arch.The daily average temperature is cooperated well with the calculation temperature.