谢异同，  王鑫娟，  任  键，  葛兴云，  王  强，  穆德君
    （西安建筑科技大学土木学院，西安 710055）

[摘要] 采用小波分解的方法对汶川地震近震区竖向地震动加速度进行分解，并对大跨度结构作多点竖向地震动输入，采用时程分析法计算不同频段竖向地震动对大跨度结构的内力反应。结果反映，竖向地震动含有较多的高频成分，其对结构高阶振型的影响较大。因此，在抗震设计中竖向地震动和结构的高阶振型不容忽视。
[关键词] 竖向地震动；多支点；小波分解；地震反应分析
中图分类号：TU311.3  文献标识码：A  文章编号：1002-848X(2011) Sl-0224-04

Wavelet method for multi-support analysis of long-span structures under vertical seismic excitation
    Xie Yitong, Wang Xinjuan, Ren Jian, Ge Xingyun, Wang Qiang, Mu Dejun
    ( Xian University of Technology and Architecture,  Civil Engineering,  Xian 710055,  China)

Abstract: The wavelet decomposition method was used to decompose the vertical seismic motion of the earthquake near Wenchuan, and multi-point vertical ground motion was input for long-span structures. Then the method of time-history analysis was used to calculate the intemal force response of vertical seismic of different frequency bands for long-span structures. The results show that the vertical ground motion contains more high frequency components, which affects lugher mode greatly. Therefore, the earthquake-resistant design can't neglect vertical ground motion and lugher mode.
Keywords:  vertical ground motions; multi-pivot; wavelet decomposition; seismic response analysis