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Distributed Yielding Concept for Improved Seismic Collapse Performance of Rigid Wall-Flexible Diaphragm Buildings
| 题名： | Distributed Yielding Concept for Improved Seismic Collapse Performance of Rigid Wall-Flexible Diaphragm Buildings |
| 正文语种： | 英文 |
| 作者： | Maria Koliou, A.M.ASCE; Andre Filiatrault, M.ASCE; Dominic J. Kelly, M.ASCE; John Lawson, M.ASCE |
| 作者单位： | State Univ, of New York at Buffalo;California Polytechnic State Univ |
| 关键词： | Rigid wall flexible diaphragm buildings; Flexible roof diaphragms; Numerical modeling; Seismic collapse performance; Distributed yielding concept; Roof diaphragm weakening; Nonlinear dynamic time history analyses; Seismic effects. |
| 摘要： | Rigid wall-flexible diaphragm (RWFD) buildings are a comm on type of single-story constructio n in North America, Europe, and New Zealand that incorporate rigid in-plane con Crete or masonry walls and flexible in-plane wood, steel, or hybrid roof diaphragms. RWFD buildings have shown poor seismic performance during past earthquake events. In particular, it has been observed that the global seismic response is dominated by the response of the diaphragm, which is mainly attributed to large in-plane diaphragm displacements that significantly exceed the displacements of in-plane walls. In this study, the concept of distributed yielding in the flexible diaphragm by weakening certain intermediate diaphragm zones is explored as a cost-effective means to improve the seismic collapse capacity of RWFD buildings and mitigate their seismic vulnerability. A two-dimensional numerical framework was developed specifically for analyzing RWFD buildings and was used to evaluate the proposed concept. Results of nonlinear dynamic time-history response analyses conducted on a typical RWFD building incorporating a wood roof diaphragm show that distributing the inelastic response of the flexible diaphragm along its span is beneficial to the seismic collapse capacity of RWFD buildings. A seismic design approach based on this concept is also formulated. DOI: 10.106l/(ASCE)ST.1943-541X.0001386. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.02 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.02 |
| 页码： | 04015137 |
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