大跨径桥梁温度作用效应计算要点

Calculating points of temperature effect in large-span bridge

介绍了气温变化对桥梁结构的三种作用方式,并对混凝土收缩及徐变效应进行了阐述,论述了桥梁纵向和横向计算时的温度作用效应,最后分析了温度梯度模式对温差应力的影响,从而提高主梁截面的抗裂性能,保证桥梁结构的安全性。

It introduces three acting ways of bridge frame which caused by the change of temperature, elaborates shrinking and changing effect of concrete, discusses the temperature effect when calculating lengthways and breadthwise. Finally, it analyses temperature grads mode＇s influence on stress of temperature difference so as to raise the anti-rapture ability of the main bridge section and ensure the safety of bridge frame.