新型人字支撑复合结构的拟动力试验研究
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摘要
通过对代替黏土砖住宅结构的新型人字支撑复合结构的拟动力试验,以研究该结构的抗震性能。试验设计为1∶2缩尺的单层模型XB,竖向荷载模拟6层结构,输入El Centro波,地震动加速度峰值分别相当于7,8,9度多遇地震波和罕遇7,7.5,8度地震波。试验结果得出,该复合结构开裂、屈服及破坏的地震波分别是8度多遇、7度罕遇、8度罕遇。由试验绘出的刚度退化曲线、恢复力曲线、位移时程曲线均表明,复合结构XB具有较好的抗震性能。支撑顶部的竖向位移说明,复合结构在多遇地震作用下不需考虑竖向位移的影响,仅在支撑屈服后再承担大震时需要考虑其影响。
Experiments are conducted on novel herringbone braces composite structure under pseudo-dynamic test.A test model of scale 1∶2 is manufactured.The loading process is the input of El Centro wave,and the maximum accelerations of ground motion are respectively small and rare earthquake of 7,8 and 9 intensity.Based on the experiment,the earthquake waves of cracking,yielding and failing for the structure are obtained,they are small earthquake of 8 intensity,rare earthquakes of 7 intensity and 8 intensity.It is obvious that the composite structure posses better ductility and seismic property on the basis of the stiffness deteriorating curve,hysteresis curves and the displacement time curves obtained by the experiment.The vertical displacement of the braces top need not be considered under small earthquakes of 7,8 and 9 intensity,but it need be considered after the braces are attained to yield.
Experiments are conducted on novel herringbone braces composite structure under pseudo-dynamic test.A test model of scale 1∶2 is manufactured.The loading process is the input of El Centro wave,and the maximum accelerations of ground motion are respectively small and rare earthquake of 7,8 and 9 intensity.Based on the experiment,the earthquake waves of cracking,yielding and failing for the structure are obtained,they are small earthquake of 8 intensity,rare earthquakes of 7 intensity and 8 intensity.It is obvious that the composite structure posses better ductility and seismic property on the basis of the stiffness deteriorating curve,hysteresis curves and the displacement time curves obtained by the experiment.The vertical displacement of the braces top need not be considered under small earthquakes of 7,8 and 9 intensity,but it need be considered after the braces are attained to yield.
引文
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[9]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000:75-101.
[2]王新玲,赵更歧,张念征.一榀新型住宅复合结构的动力性能研究[J].工业建筑,2006,36(2):24-27.
[3]王新玲,张海东.多层住宅新型复合结构在竖向荷载作用下的试验分析[J].郑州大学学报:工学版,2005,26(4):5-8.
[4]王新玲,赵更歧,张海东.多层住宅新型复合结构的抗震试验研究[J].土木工程学报,2006,39(8):51-56.
[5]宗周红,林东欣,房贞政,等.两层钢管混凝土组合框架结构抗震性能试验研究[J].建筑结构学报,2002,23(2):27-35.
[6]Buono Pance S G,White R N.Pseudo Dynamic Testing ofMasonry in Filled Reinforced Concrete Frame[J].Journal ofStructural Engineering,1999,25(6):578-589.
[7]吴炎海,程浩德.钢筋混凝土带开孔梁框架抗震性能试验研究[J].地震工程与工程振动,2004,24(2):75-81.
[8]JGJ 101—96建筑抗震试验方法规程[S].
[9]邱法维,钱稼茹,陈志鹏.结构抗震实验方法[M].北京:科学出版社,2000:75-101.
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