论文部分内容阅读
本文推导了带刚域杆件考虑轴压力效应和剪切变形时的单元刚度方程，将框筒结构展开为等效平面框架，按集中质量模型计算竖向地震作用，然后，分别计算了设防烈度 7度、 8度和 9度的小震情况下，相对于楼层重力荷载的临界荷载因子 pcr。计算结果表明 ,竖向地震作用对框筒结构的整体稳定影响显著。考虑竖向地震作用后，临界荷载因子值 pcr减小，当设防烈度为 9度， pcr值减小约 17％。
In this paper, the stiffness equation of element with a rigid body member considering shaft pressure and shear deformation is deduced. The frame structure is expanded into an equivalent plane frame and the vertical seismic action is calculated according to the mass model. Then, the fortification intensity 7th, 8th and 9th degree of small earthquakes case, relative to the critical gravity load floor load factor pcr. The calculation results show that the vertical seismic effect has a significant effect on the overall stability of the frame structure. After considering the vertical seismic action, the critical load factor pcr decreases. When the fortification intensity is 9 degrees, the pcr value decreases about 17%.