地震荷载作用下考虑杆件屈曲的单层球面网壳结构整体稳定性研究

Analysis of the Member Buckling Influence on the Stability of Single-Layer Lattice Dome under Seismic Force

在地震荷载作用下,关于网壳结构整体稳定性的研究是空间结构研究的重要课题之一。目前,在地震荷载作用下,对于网壳结构整体稳定性的研究很少有考虑杆件缺陷这一影响因素的。本文利用多段梁法建立具有杆件缺陷的K8型网壳结构模型,通过削弱不同位置处的杆件,使其先于网壳结构整体失稳之前首先屈曲,重点研究在三向地震荷载作用下,不同位置处的杆件屈曲对网壳结构整体稳定性的影响。

The study on the single-layer lattice dome stability is one of the important subjects in spacial structure research. Under cur-rent seismic force, the stability analysis for the single-layer lattice dome rarely involves the influence factors of member buckling. Thispaper uses the multiple-beam method to build multiple the K8 single-layer lattice dome, by buckling the different location of the mem-ber to make it bucking before the single-layer lattice dome instability. And it also studies the effect of member bucking on the stabilityof the single-layer lattice dome under the three dimensional seismic forces.