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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.8: Seismic Engineering; 20050717-21; Denver,CO(US) >ON A PROCESS OF RAPID ESTIMATION OF SEISMIC DEMANDS FOR GENERIC STEEL FRAME STRUCTURES
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ON A PROCESS OF RAPID ESTIMATION OF SEISMIC DEMANDS FOR GENERIC STEEL FRAME STRUCTURES

机译：钢框架结构地震需求的快速估算过程

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摘要

The seismic demands of tall buildings can be evaluated by nonlinear response history analysis with some more representative, site-dependent, earthquakes, or by pushover analysis. However, the process of the evaluation is tedious and time consuming. Therefore, it is desirable to have a simplified process that provides quick and reasonable estimates of seismic demands, especially in the stage of conceptual (preliminary) design. Gupta & Krawinkler (2000) has reached on a process in the estimation of roof and story drift demands for frame structures from the spectral displacement at the first period of the structure, through a series of modification factors, accounting for MDOF effects, inelasticity effects, and P-delta effects. It is found that this process can estimate seismic demands reasonably, provided that no negative post-yield story stiffness exists. Also, the modification factors are uniform or with reasonable dispersion, except for structures dominated by higher mode effects. This study has conducted a similar research by performing simulations on Taiwan code—compliant structures of different heights (2,5,10,20 and 30 stories), located in different seismic zones and subjected to sets of local ground motions. The feature of this study is that the seismic demands are estimated from the SRSS of the elastic, modal roof displacements of the structure, instead of the first mode spectral displacement. The simulation results have shown that the modification factors are more promising - uniform or with more reasonable dispersion -even the structure is dominated by high mode effects. Therefore, it is concluded that the process proposed in this study is a feasible method and the modification factors obtained in this study are useful for local engineer in engineering applications.
机译：高层建筑的地震需求可以通过非线性响应历史分析和一些更具代表性的，取决于地点的地震来评估，也可以通过推覆分析来评估。但是，评估过程既繁琐又耗时。因此，期望有一种简化的过程，其提供地震需求的快速和合理的估计，尤其是在概念（初步）设计阶段。 Gupta＆Krawinkler（2000）提出了一个过程，它根据结构第一阶段的光谱位移，通过一系列修正因子，估计了MDOF效应，非弹性效应，和P-delta效应。发现如果不存在负屈服后层刚度，该过程可以合理地估算地震需求。此外，修饰因子是均匀的或具有合理的色散，但以较高模态效应为主的结构除外。这项研究通过对台湾法规（位于不同地震带并经受局部地震动的不同高度（2、5、10、20和30层）的顺应性结构）进行模拟，从而进行了类似的研究。这项研究的特征是，地震需求是根据结构的弹性模态屋顶位移而不是第一模态频谱位移的SRSS估算的。仿真结果表明，修饰因子更有希望-均匀或具有更合理的色散-即使结构以高模效应为主。因此，可以得出结论，本研究中提出的方法是一种可行的方法，并且该研究中获得的修改因子对于本地工程师在工程应用中很有用。

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