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Seismic Rehabilitation of Concentrically Braced Frames Using Stiff Rocking Cores
| 题名： | Seismic Rehabilitation of Concentrically Braced Frames Using Stiff Rocking Cores |
| 其他题名： | AISC.(2010a)."Seismic provisions for structural steel buildings."ANSI/AISC 341-10,Chicago. |
| 正文语种： | 英文 |
| 作者： | Michael Pollino |
| 关键词： | rehabilitation；mechanica；behavior；exist；prototype；design；structure；drift；sting；redis |
| 摘要： | Existing steel concentrically braced frame (CBF) buildings subjected to seismic hazards can exhibit an undesirable soft-story response, in which drift and damage are concentrated in a single story, whereas other stories remain relatively undamaged. This paper investigates the fundamental behavior and proposes a rehabilitative design procedure that uses a stiff rocking core (SRC) to redistribute lateral demands, thereby preventing soft-story response. The technique is relatively nonintrusive compared to traditional rehabilitative measures and can satisfy a maximum specified story drift for a given hazard level. Representative low-rise and midrise prototype CBFs are used to illustrate the fundamental mechanical and dynamic behavior of the SRC in support of the proposed rehabilitation design procedure. Results from nonlinear transient seismic analysis of both existing and SRC-rehabilitated CBFs are used to evaluate the SRC's ability to improve the seismic performance of existing CBF structures. These results indicate that the SRC can be designed to prevent soft-story formation and, at the same time, achieve a target maximum interstory drift for a given seismic hazard. |
| 出版年： | 2017 |
| 论文唯一标识： | P-26Y2017V143N09004 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001810 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 143 |
| 期： | 09 |
| 页码： | 28-38 |
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