【摘要】 本文采用动力时程直接积分法对一260m×77.8m空间网架结构进行弹塑性抗震分析。分析中选取两条天然波与一条人工波作为水平x、y向以及竖向地震动输入,并采取考虑下部支撑结构的整体建模方式,选取了符合材料与构件特点的弹塑性本构关系模型。结果给出了弹塑性时程分析过程中网架出铰顺序和位置,指出了在罕遇地震作用下空间网架结构的薄弱部位。更多还原

【Abstract】 This paper presents an analysis on elastic-plastic seismic performance of a long span space trass in Xi’ an.Two natural earthquake waves and one artificial wave of Xi’ an are selected as seismic excitations in three direc- tions.The analysis model of the hanger includes the supporting system and the roof structure.Elastio-plastic constitu- tive relationship which is the same with the materials and structural property of the model is used in calculation.The output sequence and position of the plastic ream are given in the result and the weak points of structure under earth- quake loading are pointed out.更多还原