【摘要】 对贵阳奥体中心体育场大悬挑预应力钢屋盖进行地震作用下的动力稳定性进行分析。考虑了x向地震、y向地震、z向地震和xyz三向耦合四种情况,计及了结构几何非线性影响。分析发现水平纵向的动力失稳荷载与水平径向的动力失稳荷载相比降低显著。在竖向地震作用下结构的失稳荷载比水平纵向地震作用时的失稳荷载有所增加。在三向地震作用下,结构的失稳荷载最小。更多还原

【Abstract】 The dynamic stability analysis of long cantilever prestressed spatial structure of the Palaestra of Guiyang Olympic Center was studied.In the analysis the seismic effect in x direction,y direction,z direction and xyz triple direction,and the structural geometric nonlinearity were considered.Analysis shows that the dynamic stability load under horizontal longitudinal seismic effect is much lower than that under horizontal radial seismic effect.The dynamic stability load under vertical seismic effect is slightly larger than that under horizontal longitudinal seismic effect.The xyz triple direction seismic action gives the smallest stability load.更多还原