水平地震作用考虑土-结构共同作用的高层钢结构交错桁架内力分析

Ananlysis of internal forces of high-rise steel staggered truss under horizontal seismic considering soil-structure interaction

研究了三维高层钢结构交错桁架的动力内力反应,在计算水平地震作用下交错桁架的动力反应时考虑土-结构共同作用。在进行内力计算与分析时,同时研究交错桁架结构底柱固定与考虑共同作用两种情况,对水平地震作用下的最大动力反应进行了研究。计算结果表明:考虑土-结构共同作用时,水平地震作用下交错桁架柱子的最大内力将减少,并且其内力变化也更加缓和。

The dynamic internal forces of the three dimensions high - rise steel staggered truss were studied, and the influence of soil - structure interaction （SSI） were considered when the responses of this system under hori- zontal seismic was calculated. The internal forces of staggered truss system with column foot fixed and with pile group＇ s foundation considering SSI were calculated and investigated. The maximum dynamic response of that un- der horizontal seismic was also investigated. The result shows that the maximum responses decreases with considering the SSI, and the variations of them decreases dramatically.