| 非正规设计框架结构抗震加固支撑效果对比研究 |
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| 引用本文： | 王国新,卢鹏洁.非正规设计框架结构抗震加固支撑效果对比研究[J].震灾防御技术,2018,13(4):748-755. |
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| 作者姓名： | 王国新 卢鹏洁 |
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| 作者单位： | 1.大连理工大学, 海岸和近海工程国家重点实验室, 辽宁大连 116024 |
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| 基金项目： | “十二五”国家科技支撑计划项目（2014BAL05B03），国家自然科学基金项目（51378092、51578113） |
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| 摘 要： | 近年来，随着经济、技术的进步以及抗震意识的加强，建筑结构加固也飞速发展。在地震多发的农村地区，为了提高建筑结构的抗震性能，但同时又缺乏一定的经济基础和理论知识支撑，导致很多简单粗糙的支撑建筑结构的措施出现，这些支撑方案大多缺乏科学的设计与评估。本文针对这一现象，以某典型的非正规设计的3层2跨框架结构为例，分析评价支撑边框和支撑中框对该框架结构地震作用下抗倒塌性能的影响。通过增量动力分析（IDA）计算方法，结合结构易损性方程评估结构的抗倒塌能力，计算结果表明支撑中框和支撑边框能够将非正规结构在罕遇地震作用下的倒塌概率从17.5%降至2.4%和6%。在此基础上，进一步分析了2种支撑位置对结构在3个典型地震强度作用下对结构响应的影响。结果表明，支撑框架结构中框对结构抗倒塌能力的提升和抗震性能的保证效果比支撑边框更好，在条件允许的情况下，应优先考虑支撑中框。
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| 关 键 词： | 倒塌易损性 非正规设计框架结构 抗震性能 抗倒塌能力 |
| 收稿时间： | 2018/2/10 0:00:00 |
Study on Support Location for Vulnerable RC Structures |
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| Wang Guoxin and Lu Pengjie.Study on Support Location for Vulnerable RC Structures[J].Technology for Earthquake Disaster Prevention,2018,13(4):748-755. |
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| Authors: | Wang Guoxin and Lu Pengjie |
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| Institution: | 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China2.Institute of Earthquake Engineering, School of Hydraulic Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China |
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| Abstract: | With the progress of economy and the strengthening of seismic consciousness, the strengthening of building structure has also developed rapidly in the past decades. However, there are many limits to improve structural seismic resistance in rural seismic regions. There are many simple and rough measures to support the building structures, in which most of them are lack of scientific design and evaluation. There exists a lot of vulnerable buildings that are potentially in dangerous condition. In this paper, we use a typical 2-span 3-storey frame structure as an example, to explore the impact of support location of a common support form on anti-collapse performance. Incremental dynamic analysis is used to organize nonlinear dynamic collapse analysis, and structural collapse fragility analysis is utilized to assess structural collapse safety. The results show that the simple support measures for vulnerable structure can reduce the collapse probability of the vulnerable building from 17.5% to 2.4% and 6%. The result shows that by exploring the structural seismic response with different frames supported, the supporting middle frame can improve the vulnerable building better than the side frame. Our results of this study can provide some suggestions for building support in seismic rural areas. |
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| Keywords: | Collapse fragility Vulnerable RC structure Seismic performance Collapse resistance |
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