下部结构对钢管拱桁架抗震性能的影响

On influence of lower parts on steel pipe arch truss' s seismic performance

通过建立模型,从结构的节点位移、抗震承载力和破坏形式等方面,对三种不同下部结构钢管拱桁架进行了强震下动力弹塑性时程分析,结果表明,三种下部结构拱桁架都能够满足预期的抗震设防目标,下部结构形式会影响拱桁架结构的抗震承载力。

By establishing the model, the paper undertakes the dynamic elastic-plastic time-history analysis of the three kinds of lower parts on steel pipe arch truss under severe earthquakes from the joint displacement, seismic loading capacity and damage forms of the structure, proves by the result that the three lower structures can meet the demands of the expected seismic protection, indicates the lower parts can affect the seismic loading capacity of the arch truss structure.