论文部分内容阅读
为研究杆件屈曲对单层球面网壳结构整体稳定性的影响,采用非线性有限单元法,在考虑节点缺陷和杆件缺陷的基础上,通过削减K8型单层球面网壳结构一径向不同位置处的杆件截面使其在网壳结构发生整体失稳之前屈曲,分别在静力载荷和地震载荷作用下,研究不同位置处的杆件屈曲对K8型单层球面网壳结构整体稳定性的影响.研究结果表明:在静力载荷作用下,不同位置处的杆件屈曲会不同程度的降低网壳结构极限承载力;在地震载荷作用下,单根杆件结构的首先屈曲会使网壳结构刚度降低.
In order to study the influence of the buckling of bar on the overall stability of single-layer spherical reticulated domes, nonlinear finite element method is adopted. Based on the consideration of node defects and rod defects, The section of the bar at different positions causes it to buckle before the global instability of the reticulated shell structure. Under the action of static load and earthquake load, the buckling of the bar at different positions is studied to the overall stability of the K8 single-layer reticulated dome The results show that under the static load, the buckling of the bar at different positions will reduce the ultimate bearing capacity of the reticulated shell to some extent. Under the action of earthquake load, the first buckling of the single bar structure will make Reticulation structure stiffness reduced.