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首页> 外文期刊>Canadian Journal of Pure and Applied Sciences >COMPARING NONLINEAR STATIC ANALYSIS METHODS IN PREDICTING THE SEISMIC RESPONSE OF STRUCTURES ISOLATED BY SLIDING BASE ISOLATORS
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COMPARING NONLINEAR STATIC ANALYSIS METHODS IN PREDICTING THE SEISMIC RESPONSE OF STRUCTURES ISOLATED BY SLIDING BASE ISOLATORS

机译：非线性静力学分析方法在滑移基础隔震隔离结构地震反应预测中的比较

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摘要

In this paper the performance of different nonlinear static analysis methods and their accuracy in predicting the seismic response of structures isolated by sliding base isolators has been compared. For this purpose, first,5 and 10-story isolated steel structures with special moment frames located in LA, US were designed according to AISC 360, AISC 341, and ASCE 7 design requirements. In this study, friction pendulum system (FPS) has been used as isolation system. Results of non-linear static pushover analyses of the models with triangular, uniform, and PSC (Protective Systems Committee) load patterns, modal pushover analysis (MPA), and N2 method were compared with the results obtained by nonlinear dynamic time history analysis as a criterion for accuracy in this study. According to the results, it was concluded that in predicting the story shear responses, pushover analysis with triangular load pattern had accurate response compared to other studied methods. Also in predicting floor displacement responses and story drifts, pushover analysis under uniform load pattern, N2 , and MPA methods resulted in more accurate responses regarding the other methods. Overall, N2 method had the most accuracy with respect to nonlinear dynamic analysis in predicting story shears, story drifts, floor displacements and maximum hinge rotations in structures isolated by sliding base isolators.
机译：本文比较了各种非线性静力分析方法的性能及其在预测由滑动基础隔震器隔离的结构的地震响应中的准确性。为此，根据AISC 360，AISC 341和ASCE 7设计要求，设计了位于美国洛杉矶的带有特殊弯矩框架的5层和10层隔离钢结构。在这项研究中，摩擦摆系统（FPS）已被用作隔离系统。将具有三角形，均匀和PSC（保护系统委员会）负载模式的模型的非线性静态Pushover分析，模态Pushover分析（MPA）和N2方法的结果与通过非线性动态时程分析获得的结果进行比较。本研究准确性的标准。根据结果​​，得出的结论是，在预测故事的剪力响应时，与其他研究方法相比，采用三角荷载模式的推覆分析具有准确的响应。同样，在预测楼板位移响应和楼层漂移时，在均匀荷载模式，N2和MPA方法下的推覆分析也可以得出关于其他方法的更准确的响应。总体而言，N2方法在非线性动态分析方面具有最高的准确性，可用于预测由滑动基础隔离器隔离的结构中的楼层剪切，楼层漂移，地板位移和最大铰链旋转。

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