钢管混凝土框架-混凝土核心筒减震结构振动台试验研究
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摘要
某超高层钢管混凝土框架-混凝土核心筒结构因指标超限在设计中采用了耗能减震技术,为了检验该减震结构的抗震性能,制作了1/35的缩尺模型,通过在钢管混凝土框架设置阻尼器或不设置阻尼器,进行模拟地震振动台对比试验,研究了模型结构的动力特性和不同烈度地震作用下的加速度、位移和应变响应。研究结果表明:地震作用下,该钢管混凝土框架-混凝土核心筒减震结构与钢管混凝土框架-混凝土核心筒结构相比,位移、加速度和应变响应均有一定程度的降低;罕遇地震作用下,通过设置耗能减震构件,层间位移角最大值从超过规范要求的1/84减低至满足规范要求的1/130,表明该减震结构具有更优良的抗震性能。
The super high CFST(concrete-filled steel tubes) frame-RC core building's structural indexes do not meet the requirements of current design code,so the energy dissipation technology is adopted.In order to investigate the seismic performance of this structure with energy dissipating devices,the 1/35 scale model with or without the energy dissipating devices is tested respectively on the shaking table to study and contrast the seismic behavior of the model structure.The dynamic characteristics and the model responses of acceleration,deformation and strain under different earthquake intensities are analyzed.Test and analysis results show that the displacement,acceleration and strain of the model with energy dissipating devices are smaller than the model without energy dissipating devices under different earthquake intensities.The maximum of structure's story drifts with energy dissipating devices is decreased from 1/84 to 1/130 by installing dampers under the action of rare earthquake and satisfy the requirements of the Chinese code,so the CFST frame-concrete core wall structure with energy dissipating devices demonstrates better seismic performance than this hybrid structure without energy dissipating devices.
The super high CFST(concrete-filled steel tubes) frame-RC core building's structural indexes do not meet the requirements of current design code,so the energy dissipation technology is adopted.In order to investigate the seismic performance of this structure with energy dissipating devices,the 1/35 scale model with or without the energy dissipating devices is tested respectively on the shaking table to study and contrast the seismic behavior of the model structure.The dynamic characteristics and the model responses of acceleration,deformation and strain under different earthquake intensities are analyzed.Test and analysis results show that the displacement,acceleration and strain of the model with energy dissipating devices are smaller than the model without energy dissipating devices under different earthquake intensities.The maximum of structure's story drifts with energy dissipating devices is decreased from 1/84 to 1/130 by installing dampers under the action of rare earthquake and satisfy the requirements of the Chinese code,so the CFST frame-concrete core wall structure with energy dissipating devices demonstrates better seismic performance than this hybrid structure without energy dissipating devices.
引文
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[2]Loh HY,Uy B,Bradford MA.The effects of partial shear connection in composite flush end plate joints[J].Journal of Constructional Steel Re-search,2006,62(4):391-412.
[3]霍静思,韩林海.钢管混凝土柱-钢梁节点的力学性能分析[J].计算力学学报,2008,25(1):35-40.
[4]钟善桐.钢管混凝土统一理论-研究与应用[M].北京:清华大学出版社,2006.
[5]Han Lin Hai,Lin Xiao Kang,Wang Yong Chang.Cyclic performance of repaired concrete-filled steel tubular columns after exposure to fire[J].Thin-Walled Structures.2006,44(10):1063-1076.
[6]Han Lin Hai,Li Wei,Yang You Fu.Seismic behaviour of concrete-filled steel tubular frame to RC shear wall high-rise mixed structures[J].Journal of Constructional Steel Research,2009,65(5):1249-1260.
[7]周云,邓雪松,汤统壁,等.中国(大陆)耗能减震技术理论研究、应用的回顾与前瞻[J].工程抗震与加固改造,2006,28(6):1-15.
[8]吕西林.复杂高层建筑结构抗震理论与应用[M].北京:科学出版社,2007:201-219.
[9]龚治国,吕西林,卢文胜混合结构体系高层建筑模拟地震振动台试验研究[J].地震工程与工程振动,2004,24(4):99-105.
[10]周颖,吕西林.双塔连体高层混合结构抗震性能研究[J].地震工程与工程振动,2008,28(5):71-78.
[11]周云.黏滞阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006:152-202.
[12]GB50011—2001(2008年版)建筑抗震设计规范[S].北京:中国建筑工业出版社,2008.
[13]JG101—96建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1996.
[14]JGJ3—2002高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.
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