大型火电厂钢结构主厂房框排架结构抗震性能试验研究
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摘要
为了解钢框排架结构的抗震性能,以位于抗震设防烈度8度区的某大型火电厂钢结构主厂房框排架结构为原型,按1∶10缩尺比例设计制作试验模型,并对其进行拟动力试验,研究该结构在地震作用下的加速度反应、位移反应、滞回特性、刚度和耗能性能。研究结果表明:钢框排架结构延性相对较好,具有较强的塑性变形能力。模型结构底层和第二层层间位移角较大,是模型结构的薄弱层。模型结构在三种地震波(El Centro波、Taft波、兰州人工波)的多遇地震以及El Centro波的罕遇地震作用下,层间位移角均满足我国现行规范要求。钢框排架结构体系可满足8度设防要求,具有良好抗震性能。
In order to study the seismic behavior of steel frame-bent structures,the pseudo-dynamic test was carried out on a 1∶ 10 model of the steel frame-bent structure selected from a large thermal power plant main building built in the zone with a seismic design intensity of 8 degree.The seismic responses such as acceleration,displacement,hysteretic property,stiffness and energy dissipation were analyzed.The results show that the steel frame-bent structure has good ductility and good plastic deformation capacity.The inter-story drift is relatively large on the bottom story and the second story,namely the weak stories.The maximum inter-story drift of the model structure under intensity of 8 degree frequent and rare earthquakes are all less than their limit values regulated by the present seismic code.The steel frame-bent structure can satisfy the demand of seismic design in intensity of 8 degree zones and has good seismic behavior.
In order to study the seismic behavior of steel frame-bent structures,the pseudo-dynamic test was carried out on a 1∶ 10 model of the steel frame-bent structure selected from a large thermal power plant main building built in the zone with a seismic design intensity of 8 degree.The seismic responses such as acceleration,displacement,hysteretic property,stiffness and energy dissipation were analyzed.The results show that the steel frame-bent structure has good ductility and good plastic deformation capacity.The inter-story drift is relatively large on the bottom story and the second story,namely the weak stories.The maximum inter-story drift of the model structure under intensity of 8 degree frequent and rare earthquakes are all less than their limit values regulated by the present seismic code.The steel frame-bent structure can satisfy the demand of seismic design in intensity of 8 degree zones and has good seismic behavior.
引文
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[2]彭修宁,薛建阳,刘祖强,等.刚性钢框架异型节点性能及设计方法[J].土木建筑与环境工程,2010,32(3):22-26.(PENG Xiuning,XUE Jianyang,LIUZuqiang,et al.Mechanical behaviors and design methodfor irregular joints in rigid steel frames[J].Journal ofCivil,Architectural&Environmental Engineering,2010,32(3):22-26.(in Chinese))
[3]薛建阳,刘祖强,彭修宁,等.钢结构异型节点受力性能及非线性有限元分析[J].西安建筑科技大学学报:自然科学版,2010,42(5):609-613.(XUEJianyang,LIU Zuqiang,PENG Xiuning,et al.Mechanical properties and non-linear finite elementanalysis of steel abnormal joints[J].Journal of Xi’anUniversity of Architecture&Technology:NaturalScience Edition,2010,42(5):609-613.(inChinese))
[4]薛建阳,胡宗波,彭修宁,等.钢结构箱形柱与梁异型节点破坏机理的试验研究[J].建筑结构学报,2010(增刊1):50-54.(XUE Jianyang,HU Zongbo,PENGXiuning,et al.Experimental study on failuremechanism of irregular joints between steel box columnsand beams[J].Journal of Building Structures,2010(Suppl.1):50-54.(in Chinese))
[5]薛建阳,刘祖强,胡宗波,等.钢框架异型节点核心区的受剪机理及承载力计算[J].地震工程与工程振动,2010,30(5):37-41.(XUE Jianyang,LIU Zuqiang,HU Zongbo,et al.Shear mechanism and capacitycalculation of abnormal joint panel zone in steel frame[J].Journal of Earthquake Engineering andEngineering Vibration,2010,30(5):37-41.(inChinese))
[6]JGJ101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997:28-31.(JGJ101—1996Specification of testing methods for earthquake resistantbuilding[S].Beijing:China Architecture&BuildingPress,1997:28-31.(in Chinese))
[7]Buonopane S G,White R N.Pseudo-dynamic testing ofmasonry infilled reinforced concrete frame[J].Journalof Structural Engineering,ASCE,1999,125(6):575-589.
[8]Chung Woo-Jung,Yun Chung-Bang,Kim Nam-Sik,et al.Shaking table and pseudo-dynamic tests for theevaluation of the seismic performance of base-isolatedstructures[J].Engineering Structures,1999,21(4):365-379.
[9]Elnashai A S,Elghazouli A Y,Denesh-Ashtiani F A.Response of semi-rigid steel frames to cyclic andearthquake loads[J].Journal of Structural Engineering,ASCE,1998,124(8):857-867.
[10]Molina F J,Verzeletti G,Magonette G,et al.Bi-directional pseudo-dynamic test of a full-size three-storey building[J].Earthquake Engineering andStructural Dynamics,1999,28(12):1541-1566.
[11]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(GB50011—2010Codefor seismic design of buildings[S].Beijing:ChinaArchitecture&Building Press,2010.(in Chinese))
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