不规则高层混合结构整体模型模拟地震振动台试验研究
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摘要
以厦门福隆大厦为背景,对不规则高层结构的1/20整体模型进行模拟地震振动台试验研究,测试了模型结构的动力特性、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等,研究了模型结构的破坏机理和破坏模式.结果表明:模型结构前三阶振型频率依次为:1.74Hz(Y向平动)、2.28Hz(X向平动)和3.12Hz(整体扭转),其中X向和Y向平动对应阻尼比分别为6.5%和6.3%.在7度多遇和罕遇地震作用下,X向结构最大层间位移角分别为1/956和1/147,Y向结构最大层间位移角分别为1/570和1/83.因此原型结构的布置基本合理,整体抗震性能较好.最后对原型结构的抗震设计方案提出了一些改进建议.
A shaking table testing study on a 1/20 scale model of a hybrid high-rise building with irregularity was carried out with the Fulong Building in Xiamen as the project background.In the test,the model's dynamic properties,damp ratio,as well as the reaction of acceleration and deformation in frequent earthquake,basic seismic intensity and rare earthquake of 7 degree were examined,and the cracking pattern and failure mechanism of the model were studied.The result of this test demonstrates that the frequencies of the first three modes of the model are 1.74Hz (Y direction translation),2.28Hz (X direction translation) and 3.12Hz (over rotation),and the damp ratio corresponded to X direction and Y direction is 6.3% and 6.5% respectively.Under the function of frequent earthquake and rare earthquake,the maximum story drift angle of the prototype in X direction is 1/956 and 1/147 respectively,and in Y direction is 1/570 and 1/83 respectively.Therefore a rational arrangement of structural elements with good overall anti-seismic behavior was presented.Finally,some suggestions for the seismic design of the structure are put forward in this paper.
A shaking table testing study on a 1/20 scale model of a hybrid high-rise building with irregularity was carried out with the Fulong Building in Xiamen as the project background.In the test,the model's dynamic properties,damp ratio,as well as the reaction of acceleration and deformation in frequent earthquake,basic seismic intensity and rare earthquake of 7 degree were examined,and the cracking pattern and failure mechanism of the model were studied.The result of this test demonstrates that the frequencies of the first three modes of the model are 1.74Hz (Y direction translation),2.28Hz (X direction translation) and 3.12Hz (over rotation),and the damp ratio corresponded to X direction and Y direction is 6.3% and 6.5% respectively.Under the function of frequent earthquake and rare earthquake,the maximum story drift angle of the prototype in X direction is 1/956 and 1/147 respectively,and in Y direction is 1/570 and 1/83 respectively.Therefore a rational arrangement of structural elements with good overall anti-seismic behavior was presented.Finally,some suggestions for the seismic design of the structure are put forward in this paper.
引文
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[7]Wang Z F.Studyon the Differential Shortening on Hybrid Structure of Steel Reinforced Concrete and Reinforced Concrete Core-Wall[Dissertation].Xi an:Xi an University of Architecture and Tech-nology,2007(王智飞.型钢混凝土框架--钢筋混凝土核心筒混合结构体系竖向变形差研究[学位论文].西安:西安建筑科技大学,2007)
[8]Zhao X L.Dimension Error Study on Shaking Table Test ofSteel-Concrete MixedStructures[Dissertation].Shanghai:Tongji Univer-sity,2007(赵雪莲.钢--混凝土混合结构振动台试验模型尺寸误差研究[学位论文].上海:同济大学,2007)
[9]Shen D J,LX L.Research advances on simulating earthquake shaking tables and model test.Struct Eng,2006,22(6):55(沈德建,吕西林.地震模拟振动台及模型试验研究进展.结构工程师,2006,22(6):55)
[2]Huang W Y.The effect and tactics of story-height sudden change to story rigidity of high-rise building.Fujian Constr Sci Technol,2008(2):9(黄文颖.层高突变对高层建筑楼层刚度的影响及其对策.福建建筑科技,2008(2):9)
[3]Liao Y B,Huang X K.Study on changes and control methods of the lateral stiffness in tall building structures(Ⅰ).Earthquake Resistant Eng Retrofitting,2005,27(5):20(廖宇飚,黄小坤.高层建筑结构侧向刚度变化及其控制方法研究.工程抗震与加固改造,2005,27(5):20)
[4]Diao X W.Research on Aseismatic Capability and Performance-based Seismic Design ofIrregular Frame Structure[Dissertation].Shanghai:Tongji University,2006(刁现伟.不规则框架结构抗震性能研究及基于性能的抗震设计[学位论文].上海:同济大学,2006)
[5]Shi W X,Ding M,Cheng G W,et al.Shaking table model test ofa high-rise building structure.JSichuan UnivEng Sci Ed,2007,22(6):50(施卫星,丁美,成广伟,等.超限高层建筑整体模型模拟地震振动台试验研究.四川大学学报:工程科学版,2007,22(6):50)
[6]Jiang Y,Wang C K,Xiao C Z,et al.Shaking table testing study on a high-rise building model structure with serious irregularity.Bulid Sci,2005,21(1):19(姜鋆,王翠坤,肖从真,等.一幢特别不规则高层建筑结构模型的振动台试验研究.建筑科学,2005,21(1):19)
[7]Wang Z F.Studyon the Differential Shortening on Hybrid Structure of Steel Reinforced Concrete and Reinforced Concrete Core-Wall[Dissertation].Xi an:Xi an University of Architecture and Tech-nology,2007(王智飞.型钢混凝土框架--钢筋混凝土核心筒混合结构体系竖向变形差研究[学位论文].西安:西安建筑科技大学,2007)
[8]Zhao X L.Dimension Error Study on Shaking Table Test ofSteel-Concrete MixedStructures[Dissertation].Shanghai:Tongji Univer-sity,2007(赵雪莲.钢--混凝土混合结构振动台试验模型尺寸误差研究[学位论文].上海:同济大学,2007)
[9]Shen D J,LX L.Research advances on simulating earthquake shaking tables and model test.Struct Eng,2006,22(6):55(沈德建,吕西林.地震模拟振动台及模型试验研究进展.结构工程师,2006,22(6):55)
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