| Y形偏心支撑钢框架的地震反应折减系数和超强系数 |
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| 引用本文： | 杨文侠, 顾强, 宋振森, 李东, 方有珍. Y形偏心支撑钢框架的地震反应折减系数和超强系数[J]. 工程力学, 2012, 29(10): 129-136. DOI: 10.6052/j.issn.1000-4750.2010.12.0950 |
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| 作者姓名： | 杨文侠 顾强 宋振森 李东 方有珍 |
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| 作者单位： | 1.上海交通大学船舶海洋与建筑工程学院, 上海 200240;;2.苏州科技学院江苏省结构重点实验室, 苏州科技学院土木工程学院, 苏州 215011;;3.河海大学土木工程学院, 南京 210089 |
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| 基金项目： | 国家自然科学基金项目(50578099) |
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| 摘 要： | 该文采用静力推覆和能力谱方法分析了基于我国抗震规范设计的12 个Y 形偏心支撑钢框架的地震反应折减系数R和超强系数Ω及赘余度超强系数Ω3, 分析了结构层数、楼层高跨比对各系数的影响。研究结果表明:Y 形偏心支撑钢框架的设计地震作用可在我国现行抗震规范的基础上降低20%左右。
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| 关 键 词： | 地震反应折减系数 超强系数 Y 形偏心支撑钢框架 Pushover 分析 能力谱法 |
| 收稿时间： | 2012-12-18 |
| 修稿时间： | 2011-04-28 |
RESPONSE MODIFICATION FACTOR R AND OVERSTRENGTH FACTOR Ω OF Y-ECCENTRIC BRACED STEEL FRAME |
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| YANG Wen-xia, GU Qiang, SONG Zhen-sen, LI Dong, FANG You-zhen. RESPONSE MODIFICATION FACTOR R AND OVERSTRENGTH FACTOR Ω OF Y-ECCENTRIC BRACED STEEL FRAME[J]. Engineering Mechanics, 2012, 29(10): 129-136. DOI: 10.6052/j.issn.1000-4750.2010.12.0950 |
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| Authors: | YANG Wen-xia GU Qiang SONG Zhen-sen LI Dong FANG You-zhen |
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| Affiliation: | 1.School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China;;2.The Structural Key Laboratory of Jiangsu Province and Civil Engineering College, Suzhou University of Science and Technology, Suzhou 215011, China;;3.College of Civil Engineering, Hohai University, Nanjing 210089, China |
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| Abstract: | Twelve Y-eccentric braced steel frames were designed to complie with Chinese seismic code. The response modification factor R, overstrength factor Ω and redundancy factor Ω3 of each building were evaluated by the capacity spectrum method combined with the global capacity envelops obtained from an improved pushover analysis. Moreover, the effects of storey numbers and spans of the structure on these factors were analyzed. The results show that the 20% elastic design earthquake action of Y-eccentric braced steel frames can be approximately reduced on the base of Chinese seismic code. |
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| Keywords: | response modification factors overstrength factor Y-eccentric braced steel frames Pushover capacity spectrum method |
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