| 自复位消能摇摆模块复合钢框架协同抗侧机理与抗震加固设计方法 |
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| 引用本文： | 胡书领,王伟. 自复位消能摇摆模块复合钢框架协同抗侧机理与抗震加固设计方法[J]. 工程力学, 2023, 40(4): 46-57. DOI: 10.6052/j.issn.1000-4750.2021.09.0723 |
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| 作者姓名： | 胡书领 王伟 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室,上海200092;同济大学建筑工程系,上海200092 |
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| 基金项目： | 国家自然科学基金项目(52078366,51820105013);土木工程I类高峰学科建设项目(2022-3-YB-18) |
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| 摘 要： | 该文采用自复位消能摇摆模块对既有抗弯钢框架进行加固,以减小其震后残余位移、提升其地震抗倒塌性能、避免其因层间变形集中而发生薄弱层倒塌破坏。基于分布参数连续体模型,揭示了自复位消能摇摆模块与钢框架结构的协同抗侧机理,分析了自复位消能摇摆模块抗弯刚度及抗侧刚度对结构层间变形模式、摇摆模块和钢框架内力需求的影响。提出了利用自复位消能摇摆模块加固既有抗弯钢框架基于位移的抗震设计方法,给出了具体设计流程。基于提出的设计方法对某三层抗弯钢框架进行加固设计。静力推覆分析和动力分析结果表明,自复位消能摇摆模块可有效减小既有抗弯钢框架结构的震后残余变形、使结构获得均匀的层间变形模式。加固后的结构在设计地震下可达到预期设计目标。
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| 关 键 词： | 自复位消能摇摆模块 分布参数连续体模型 抗震加固 基于位移的设计方法 残余位移 动力分析 |
| 收稿时间： | 2021-09-18 |
CONTINUUM ANALYSIS AND DISPLACEMENT-BASED DESIGN METHOD OF STEEL MOMENT-RESISTING FRAME RETROFITTED WITH SELF-CENTERING ENERGY-ABSORBING ROCKING CORE |
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| Affiliation: | 1.State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China2.Department of Structural Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | This research intends to reduce the post-earthquake residual inter-story drift, enhance the seismic collapse-resistant capacity and avoid the soft-story failure due to inter-story drift concentration of moment-resisting frame (MRF) through the implementation of self-centering energy-absorbing rocking core (SCENARIO). Based on the continuum distributed parameter model, the influences of moment-resisting stiffness and lateral force-resisting stiffness of SCENARIO on the inter-story drift distribution and capacity of SCENARIO and MRF are studied. This research proposes the displacement-based design method of MRF retrofitted with SCENARIO, and the detailed design procedures are also provided. A three-story MRF is retrofitted with SCENARIO following the proposed design procedure. The results from the static pushover and dynamic analyses indicate that the SCENARIO can efficiently reduce the post-earthquake residual inter-story drift of MRF, and produce a uniform inter-story drift distribution. Moreover, the retrofitted building can achieve the performance objective. |
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