论文部分内容阅读
为分析渡槽在折线温差分布下的横向温度应力,运用公路桥梁规范中折线温差分布函数,推导了渡槽在折线温差分布下横向温度自约束应力和框架约束应力计算公式,计算了渡槽在冬季骤然降温作用下的温度应力。计算表明,渡槽外表面总应力是壁厚和温差的函数,当壁厚不变,温差减小50%时,其温度应力也相应减小50%,当温差不变,壁厚减小50%时,其温度应力减小21%;与指数温差分布函数计算的温度应力值相比,该方法计算值较小,在设计时若按此考虑渡槽温度荷载,则能显著提高渡槽的安全性能。
In order to analyze the transverse temperature stress of the aqueduct under the distribution of the temperature difference of the broken line, the formula of lateral temperature self-restraining stress and frame restraining stress of the aqueduct is deduced by using the distribution function of the broken line temperature difference in the highway bridge and bridge. Under the effect of temperature stress. The calculation shows that the total stress on the outer surface of the aqueduct is a function of the wall thickness and the temperature difference. When the wall thickness is constant and the temperature difference is reduced by 50%, the temperature stress is reduced by 50%. When the temperature difference is constant, the wall thickness is reduced by 50% , The temperature stress is reduced by 21%. Compared with the temperature stress calculated by the exponential temperature difference function, this method has a small calculation value. If we consider the aqueduct temperature load at design time, the safety performance of the aqueduct can be significantly improved.