Strength reduction factor demands for building structures under different seismic levels
Strength reduction factor demands for building structures under different seismic levels
复制标题
DOI：
10.1002/tal.1018
复制
发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
Dinh Van Thuat
中科院分区：
文献类型：
--
作者：
Dinh Van Thuat
设计地震下建筑结构的损坏程度与强度折减系数的指定值密切相关。本文旨在研究考虑不同地震地面烈度水平、土壤地面类型和强度折减系数而设计的建筑结构的强度折减系数需求。在研究中，对五层和九层框架结构的各种分析模型在相角变化但响应谱加速度幅值相同的各种地震动下进行了大量严格的非线性非弹性动力响应分析。各种规模的地震记录也被考虑作为调查的证据。结果表明，当采用相同的强度折减系数确定设计横向地震力时，中度地震区设计的结构的损伤和可靠性水平要求远低于强震区设计的结构。因此，建议设计规范中给出的强度折减系数要求可以附加地表达为最大地面加速度的线性关系。版权所有 © 2012 约翰·威利父子有限公司
Damage levels of building structures under a design earthquake are closely related to the assigned values of strength reduction factors. This paper is to investigate the strength reduction factor demands of building structures that were designed considering various earthquake ground intensity levels, soil ground types, and strength reduction factors. In the investigation, a huge number of rigorous nonlinear inelastic dynamic response analyses of various analytical models of five‐story and nine‐story frame structures were conducted under various generated ground motions with variations in phrase angles but identical response spectral acceleration amplitudes. Various scaled earthquake records were also considered for evidence of the investigation. The obtained results showed that when the same values of the strength reduction factors were used for determination of the design lateral seismic forces, the damage and reliability level demands of the structures designed for moderate seismic areas were much less than those for severe seismic ones. As a result, it is proposed that the strength reduction factor demands given in design codes can additionally be expressed in a linear relation of the maximum ground acceleration. Copyright © 2012 John Wiley & Sons, Ltd.