钢网壳模型的动力稳定性振动台试验研究

Research on the Dynamic Stability of Steel Reticulated Shells via Shaking Table Test

对两个钢扁网壳结构模型在地震荷载作用下的动力稳定性进行了振动台试验研究，观察了模型的局部动力失稳和整体动力失稳现象，通过对试验测量数据结果的处理，给出了模型中杆件的内力时程曲线和结点位移时程曲线，对这些时程曲线进行分析，总结了结构产生动力失稳时的特征和规律，同时也给出了部分理论分析的结果，并结合试验结果对理论研究中给出的动力失稳定义和判定准则以及其它结论分别进行了验证和说明．

The dynamic stability of steel shallow reticulated shells under seismic actions were studied via model test on shaking table. In the test, both the local dynamic instability for shell members and the global dynamic instability of the structure were observed. The time history for model′s nodal displacements and member′s resistance were recorded. By analyzing these records, the governing law for the structure′s dynamic instability was summarized. Some results from theoretical research were also given here, and there were compared with the test observations. Conclusions were drawn.