论文部分内容阅读
讨论恒载和地震作用下单层网壳的屈曲强度.单层网壳由安装在刚性基础(如钢筋混凝土结构)的简支座支承.首先,介绍了线性屈曲荷载的近似计算公式,并讨论了该公式的精确性.接着,评价了基于线性屈曲分析的折减系数,并根据荷载峰值提出计算公式以估计导致坍塌的地震强度.然后,对比分析了分别采用有限元分析和采用修正邓克利公式的弹-塑性屈曲荷载.最后,讨论了对本文所提出的修正邓克利公式的评价方法.结果显示,有限元分析的结果高于修正邓克利公式所给结果,而且可很容易地采用修正邓克利公式计算屈曲荷载.
The buckling strength of a single-layer reticulated shell under constant load and earthquakes is discussed.The single-layer reticulated shell is supported by a simple supporter installed on a rigid foundation (such as reinforced concrete structure) .First, the approximate formula of linear buckling load is introduced and discussed Then the accuracy of the formula is evaluated.Finally, the reduction coefficient based on linear buckling analysis is evaluated and the formula is deduced according to the load peak to estimate the seismic intensity which causes the collapse.And then, the finite element analysis and the correction of Duncley The elastic-plastic buckling load of the formula is discussed.Finally, the method of evaluating the modified Dunkeryl formula proposed in this paper is discussed.The results show that the result of the finite element analysis is higher than that of the modified Dunkley formula, and the correction Dunkerve formula for calculating buckling load.