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设置碟形弹簧的框架-摇摆墙结构抗震性能试验研究 被引量:2

Experimental investigation on seismic performance of frame-rocking wall structures using disc springs
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摘要 受控摇摆墙通常采用预应力筋的形式实现,预应力筋基础锚固施工困难,墙体摇摆幅度很小且易与基础发生碰撞.为解决上述问题,研发了一种受控摇摆墙,主要通过基于碟形弹簧的装置实现墙体的受控约束,墙体与主体框架、基础分别采用耗能连接件和V形支撑连接.设计制作了缩尺比为1∶2的对比框架与框架-摇摆墙试件,通过低周往复加载试验研究其抗震性能、破坏模式和自复位特性.结果表明,设置碟形弹簧的框架-摇摆墙较对比框架承载力提高了107.1%,且具有更好的刚度退化性能与耗能性能,框架结构的变形模式得到改善,使得各层的层间位移趋于均匀.连接件是影响框架-摇摆墙结构耗能及协调层间变形的关键,应进一步研究其改进措施及优化设计. The traditional controlled rocking wall structures are commonly realized by using prestressed tendons,where the anchorage construction of these prestressed tendons in the foundation is difficult.Moreover,the swing range of such rocking walls is limited,and rocking walls are liable to collide with the foundation.To overcome these problems,a new type of controlled rocking wall was designed,where the restraint was applied though a disc springs based device.The rocking walls were connected to the main frame and foundation by energy-dissipation connectors and V-type brace connections respectively.A control frame specimen and a frame-rocking wall structure specimen in the scale of 1:2 were designed and prepared.The seismic performance,failure mode and self-centering performance were carefully investigated through pseudo-static loading tests.Results show that the frame-rocking wall specimen using disc rings exhibits a 107.1%higher bearing capacity,better energy dissipation and less stiffness degradation than the control frame specimen.The deformation mode of the frame was effectively improved to achieve more uniform story drift.The strength of connectors is crucial to the energy dissipation performance and story drift compatibility of frame-rocking wall structures.Further studies to improve and optimize the design are required.
作者 蒋璐 李向民 张富文 董金芝 蒋利学 许清风 JIANG Lu;LI Xiangmin;ZHANG Fuwen;DONG Jinzhi;JIANG Lixue;XU Qingfeng(Shanghai Key Laboratory of Engineering Structure Safety,Shanghai Research Institute of Building Sciences,Shanghai 200032,China)
出处 《建筑结构学报》 EI CAS CSCD 北大核心 2019年第8期61-70,共10页 Journal of Building Structures
基金 “十三五”重大科技专项(2016YFC0700706) 上海市优秀技术带头人计划(16XD1422400).
关键词 框架-摇摆墙 碟形弹簧 延性连接件 拟静力试验 变形模式 耗能能力 frame-rocking wall disc spring ductility connector quasi-static test deformation mode energydissipation capacity
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