原文传递
Probabilistic Evaluation of Strength Demands for Multistory Shear Buildings
| 题名： | Probabilistic Evaluation of Strength Demands for Multistory Shear Buildings |
| 其他题名： | Anagnostopoulos,S.A.1972.Nonlinear dynamic response and ductility requirements of building structures subjected to earthquakes.Rep.No.R72-54.Cambridge,MA:Dept.of Civil Engineering,Massachusetts Institute of Technology. |
| 正文语种： | 英文 |
| 作者： | Shaghayegh Abtahi |
| 关键词： | Multi-degree-of-freedom (MDOF) systems;Equivalent single-degree-of-freedom (SDOF) systems;Strength demand;Strength reduction factor;Uncertainty;Probabilistic analysis;Nonlinear behavior |
| 摘要： | This paper employs a probabilistic framework to investigate the relationship between strength demands of multi-degree-of-freedom (MDOF) systems with that of equivalent single-degree-of-freedom (eSDOF) systems considering prevailing uncertainties. To this end, Monte Carlo sampling analysis is employed in which 1,875 records quantify the variability of ground motion. The first part of the study quantifies the probability distribution of the well-known MDOF modification factor, defined as the ratio of the strength demand of an MDOF system to that of the eSDOF system. The number of stories and the level of nonlinearity are found to be the most influential parameters on this factor. The second part of the study probabilistically quantifies the effect of this factor on the seismic performance of the structure. The results indicate a very high probability that a multistory building endures more than a twofold increase in the ductility demand when designed based on SDOF assumptions with no modification. The final part proposes a novel relationship to predict the modification factor using 1,200,000 data points, and examines past relationships in light of the new results. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N09027 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0002153 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 09 |
| 页码： | 361-372 |
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