不规则体型高层钢结构模拟地震振动台试验研究
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摘要
为研究高柱支承框架结构的抗震性能,对一V形支撑立面不规则体型高层钢框架结构进行了1/12整体模型模拟地震振动台试验,以主要结构动力特性、基底反力、柱底反力为控制目标制作模型并测试了其振型、阻尼比及其在7度多遇、7度基本、7度罕遇烈度地震作用下的加速度和位移反应.模型总高4.65m,总质量59.2t,模拟地震波采用了ElCentro波和人工波.试验中结构表现出明显的扭转效应,悬挑部分的位移反应较大;地震波三向输入时,扭转反应比单向输入时大.根据试验结果和相似理论,推导、分析了原型结构的地震反应,并对原型结构薄弱环节的抗震设计提出了建议.
In order to study the aseismic performance of long-strut-braced steel frames,a shaking table test was carried out for a vertical irregular high-rise steel structure model with a total height of 4.56 m.The 59.2 t 1/12-scale model structure,which is mainly supported by V-shaped concrete-filled steel tube struts,was built to obtain the dynamic characteristics,foundation and column-end reactions.The El Centro earthquake records and artificial waves were adopted to investigate the dynamic responses.Structure acceleration and displacement responses under the excitations of seven-degree frequent,basic,and rare earthquakes were tested.As a result,the model exhibits considerable torsional effects;the displacements of protrudent parts are relatively greater.Compared with single directional excitation,the torsional responses in three-dimensional exciting conditions are more intense.Based on the similitude theory and experimental results,the seismic responses of the prototype structure were deduced and some suggestions for improving aseismic vulnerabilities were proposed.
In order to study the aseismic performance of long-strut-braced steel frames,a shaking table test was carried out for a vertical irregular high-rise steel structure model with a total height of 4.56 m.The 59.2 t 1/12-scale model structure,which is mainly supported by V-shaped concrete-filled steel tube struts,was built to obtain the dynamic characteristics,foundation and column-end reactions.The El Centro earthquake records and artificial waves were adopted to investigate the dynamic responses.Structure acceleration and displacement responses under the excitations of seven-degree frequent,basic,and rare earthquakes were tested.As a result,the model exhibits considerable torsional effects;the displacements of protrudent parts are relatively greater.Compared with single directional excitation,the torsional responses in three-dimensional exciting conditions are more intense.Based on the similitude theory and experimental results,the seismic responses of the prototype structure were deduced and some suggestions for improving aseismic vulnerabilities were proposed.
引文
[1]Yang J J.Si milarity Theory and Structural Model Test.Wuhan:Wuhan University of Technology Press,2005(杨俊杰.相似理论与结构模型试验.武汉:武汉理工大学出版社,2005)
[2]GB50011—2001Code for Seismic Design of Buildings.Bei-jing:China Building Industry Press,2001(GB50011—2001建筑抗震设计规范.北京:中国建筑工业出版社,2001)
[3]Experi mental Report of Si mulating Shaking Table Structural Model in Jingji Dameisha Hotel in Shenzhen.Beijing:China Academy of Building Research,2005(深圳京基大梅沙酒店模拟地震振动台结构模型试验报告.北京:中国建筑科学研究院,2005)
[4]Zhang MZ.Astudy on the earthquake si mulation test of building structures.Earthquake Resistant Eng,2003(4):31(张敏政.建筑结构的地震模拟试验研究.工程抗震,2003(4):31)
[5]Zhou Y,Lu W S,Lv X L.Practical model design method of shaking table tests.Struct Eng,2003(3):30(周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法.结构工程师,2003(3):30)
[6]Lin S H.The application of earthquake response spectrumtheory in the design of building aseismic.Build Tech Dev,2005,32(6):11(林松辉.地震反应谱理论在建筑抗震设计中的应用.建筑技术开发,2005,32(6):11)
[7]Qu Y Q,Liang WX,Tian Y.Evaluation of seismic damage per-formance based on energy analysis.World Earthquake Eng,2006,22(1):109(瞿岳前,梁兴文,田野.基于能量分析的地震损伤性能评估.世界地震工程,2006,22(1):109)
[8]Cai J,Zhou J,Yu Q C.Progress of seismic design theory of buildings.J Guangzhou Univ Nat Sci Ed,2005,4(1):65(蔡健,周靖,禹奇才.建筑抗震设计理论研究进展.广州大学学报:自然科学版,2005,4(1):65)
[9]Bertero R D,Bertero V V.Performance-based seismic engineer-ing:The need for a reliable conceptual comprehensive approach.Earthquake Eng Struct Dyn,2002,31(3):627
[10]Otani S.Earthquake resistant design of reinforced concrete building’s past andfuture.J Adv Concr Technol,2004,2(1):3
[2]GB50011—2001Code for Seismic Design of Buildings.Bei-jing:China Building Industry Press,2001(GB50011—2001建筑抗震设计规范.北京:中国建筑工业出版社,2001)
[3]Experi mental Report of Si mulating Shaking Table Structural Model in Jingji Dameisha Hotel in Shenzhen.Beijing:China Academy of Building Research,2005(深圳京基大梅沙酒店模拟地震振动台结构模型试验报告.北京:中国建筑科学研究院,2005)
[4]Zhang MZ.Astudy on the earthquake si mulation test of building structures.Earthquake Resistant Eng,2003(4):31(张敏政.建筑结构的地震模拟试验研究.工程抗震,2003(4):31)
[5]Zhou Y,Lu W S,Lv X L.Practical model design method of shaking table tests.Struct Eng,2003(3):30(周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法.结构工程师,2003(3):30)
[6]Lin S H.The application of earthquake response spectrumtheory in the design of building aseismic.Build Tech Dev,2005,32(6):11(林松辉.地震反应谱理论在建筑抗震设计中的应用.建筑技术开发,2005,32(6):11)
[7]Qu Y Q,Liang WX,Tian Y.Evaluation of seismic damage per-formance based on energy analysis.World Earthquake Eng,2006,22(1):109(瞿岳前,梁兴文,田野.基于能量分析的地震损伤性能评估.世界地震工程,2006,22(1):109)
[8]Cai J,Zhou J,Yu Q C.Progress of seismic design theory of buildings.J Guangzhou Univ Nat Sci Ed,2005,4(1):65(蔡健,周靖,禹奇才.建筑抗震设计理论研究进展.广州大学学报:自然科学版,2005,4(1):65)
[9]Bertero R D,Bertero V V.Performance-based seismic engineer-ing:The need for a reliable conceptual comprehensive approach.Earthquake Eng Struct Dyn,2002,31(3):627
[10]Otani S.Earthquake resistant design of reinforced concrete building’s past andfuture.J Adv Concr Technol,2004,2(1):3
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