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本文研究了上海浦东机场(二期)候机楼在地震波为上海地表波的多点输入下的结构位移和轴力反应,并比较了该结构在地震波为El Centro波的一致输入下的结构位移和轴力反应值之间的差异。通过屋面空间结构有代表意义的节点位移和杆件轴力的计算结果比较,探讨了这些节点和杆件的相关物理量在地震多点输入下的变化规律,得出了一些有工程实践意义的结论:(1)在上海地表波和El Centro波一致水平输入下,无论结构的位移还是轴力反应均差别不大;2)多点地震输入所得的结构位移反应约为一致输入下的结构位移反应的1.1-1.5倍左右;(3)多点地震输入所得的结构位移反应约为一致输入下的结构位移反应的1.6倍左右。
In this paper, the structural displacement and axial force response of Shanghai Pudong Airport (Phase II) terminal under the multi-point input of the seismic wave to the Shanghai surface wave are studied and the structural displacement of the structure at the consistent input of the seismic wave El Centro wave is compared And the difference between the axial force response values. Through the comparison of the representative displacements of the roof space structure and the calculated results of the axial forces of the bar members, the variation laws of the related physical quantities of these joints and members under the earthquake multi-point input are discussed, and some engineering practice conclusions are drawn : (1) Under the consistent horizontal input of Shanghai surface wave and El Centro wave, there is not much difference between structural displacement and axial force response; (2) The structural displacement response obtained from multi-point seismic input is approximately the same as the displacement response About 1.1-1.5 times; (3) The displacement response of the multi-point seismic input is about 1.6 times of the displacement response under the uniform input.