Thermal Calculations for Bridge Design
Thermal Calculations for Bridge Design
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发表时间：
1975-09
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通讯作者：
B. Hunt;N. Cooke
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作者：
B. Hunt;N. Cooke
本文提出了一种计算桥梁温度应力的简单方法。非定常温度分布得到的一维非定常热方程的数值解，与实验的比较似乎验证了简化的假设，水平热运动小到可以忽略不计。通过求解二维热弹性问题计算应力，设计实例表明，用这种方法计算的应力可以明显大于忽略纵向和横向应力耦合效应计算的应力。
A straightforward method is shown for calculating thermal stresses in bridges. Unsteady temperature distributions are obtained from numerical solutions of the one-dimensional unsteady heat equation, and comparison with experiment seems to validate the simplifying assumption that horizontal heat movements are small enough to be ignored. Stresses are calculated by solving a two-dimensional thermoelastic problem, and a design example shows that stresses calculated in this way can be significantly larger than stresses calculated by ignoring the coupling effect between longitudinal and lateral stresses.