多维地震下双塔楼结构框架梁行波效应分析

ANALYSIS OF TRAVELING WAVE EFFECTS ON SEISMIC RESPONSES OF TWIN-TOWER STRUCTURE UNDER HORIZONTAL AND VERTICAL SEISMIC EXCITATIONS

考虑水平向和竖向地震波的行波效应,对北京LG大厦进行了时程分析,给出了该结构典型梁的内力信息并与在一致激励下的地震反应进行比较分析,探讨了这些梁截面的地震内力在地震行波作用下的变化规律。在进一步分析结构静力反应的基础上,分别得出结构在一致地震和行波地震作用下的抗震设计内力值,考察它们之间的差异,分析了不同的地震激励方式对结构抗震设计的影响,得出了一些有工程实践意义的结论。

Taking the traveling wave effect into consideration, the time-history analysis of Beijing LG Building under horizontal and vertical excitations are studied, and internal forces of the frame beams are compared with results under a uniform excitation. And then the changing rules of the internal forces of those frame beams under the action effect of seismic traveling wave are discussed. On the basis of further analysis of static response of the structure, seismic design values of internal forces are obtained respectively under a uniform excitation and a traveling wave excitation, and the influence of the different types of seismic excitations on the seismic design value of the structure is carried out by comparing the difference of the seismic design values obtained from two types of seismic excitations. Some conclusions for engineering practice are drawn.