HSRC框架柱的恢复力特性
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摘要
为了对在地震作用下的构件受力性能全过程进行动力分析,通过对19根参数不同的剪跨比λ≥3型钢高强混凝土框架柱的低周反复加载拟静力试验结果进行分析,运用试验拟合法,模拟了型钢高强混凝土框架柱的无量纲骨架曲线和无量纲标准滞回环,得出了型钢高强混凝土框架柱的刚度退化规律,建立了型钢高强混凝土框架柱的恢复力模型.实验结果表明:无量纲骨架曲线可以用4折线表示;无量纲标准滞回环可以用3折线表示,每循环一周,刚度退化就更严重一些,循环一周后不指向原来卸载点,产生超前指向;从屈服点到极限点之间的刚度退化随着水平位移绝对值的增加而加大.
A restoring force model was necessary for dynamic analysis of members under seismic action.In this paper,by analysis of the test results of low cyclic reversed loading experiments conducted on totally 19 steel reinforced high-strength concrete(HSRC) columns with different parameters(the slenderness ratio λ≥3),the dimensionless skeleton curves,dimensionless hysteresis loops,and stiffness degradation rules of the HSRC columns were simulated using the experimental fitting method.Based on these simulations,a restoring force model was established for the HSRC columns.The results show that the dimensionless skeleton curves can be expressed by a four-segment polygonal line;the dimensionless hysteresis loops can be expressed by a three-segment polygonal line;after each cycle,the stiffness degradation become more serious,and the curve returns but overshoots the original unloading point;the stiffness degradation between the yield point and limit point increases with an increase in the absolute horizontal displacement.
A restoring force model was necessary for dynamic analysis of members under seismic action.In this paper,by analysis of the test results of low cyclic reversed loading experiments conducted on totally 19 steel reinforced high-strength concrete(HSRC) columns with different parameters(the slenderness ratio λ≥3),the dimensionless skeleton curves,dimensionless hysteresis loops,and stiffness degradation rules of the HSRC columns were simulated using the experimental fitting method.Based on these simulations,a restoring force model was established for the HSRC columns.The results show that the dimensionless skeleton curves can be expressed by a four-segment polygonal line;the dimensionless hysteresis loops can be expressed by a three-segment polygonal line;after each cycle,the stiffness degradation become more serious,and the curve returns but overshoots the original unloading point;the stiffness degradation between the yield point and limit point increases with an increase in the absolute horizontal displacement.
引文
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[16]冯宏,李立仁,陈永庆.HSRC框架柱抗震性能的试验研究[J].西南交通大学学报,2010,45(5):705-712.FENG Hong,LI Liren,CHEN Yongqing.Experimental research on aseismic behaviors of high-strength reinforced concrete frame columns[J].Journal of Southwest Jiaotong University,2010,45(5):705-712.
[2]过镇海,时旭东.钢筋混凝土原理与分析[M].北京:清华大学出版社,2003:352.
[3]朱伯龙,张琨联.矩形及环形截面压弯构件恢复力特性的研究[J].同济大学学报,1981,9(2):1-10.ZHU Bolong,ZHANG Kunlian.A study of restoringforce characteristics of reinforced concrete flexuralmembers with a constant axial load[J].Journal ofTongji University,1981,9(2):1-10
[4]江见鲸,陆新征,叶列平.混凝土结构有限元分析[M].北京:清华大学出版社,2005:277-278.
[5]李杰,李国强.地震工程导论[M].北京,地震出版社,1992:133-135.
[6]赵鸿铁.钢与混凝土组合结构[M].北京:科技出版社,2001:233-237.
[7]中华人民共和国建设部.JGJ 138-2001型钢混凝土组合结构技术规程[S].北京:中国建筑工业出版社,2002.
[8]石晶,白国良.空腹式型钢混凝土框架柱的恢复力特性[J].西安公路交通大学学报,2000,20(4):94-97.SHI Jing,BAI Guoliang.An experimental study onrestoring force characteristics of lattice type steelreinforced concrete frame columns[J].Journal of Xi anHighway University,2000,20(4):94-97.
[9]徐亚洲.型钢混凝土弯矩-曲率滞回关系研究[D].西安:西安建筑科技大学,2005.
[10]郭子雄,张志伟,黄群贤,等.型钢混凝土柱恢复力模型试验研究[J].地震工程与工程振动,2009,29(5):79-85.GUO Zixiong,ZHANG Zhiwei,HUANG Qunxian,etal.Experimental study on hysteretic model of SRCcolumns[J].Journal of Earthquake Engineering andEngineering Vibration,2009,29(5):79-85.
[11]陶忠,翰林海.方钢管混凝土压弯构件荷载-位移滞回性能研究[J].工业建筑,2000,30(6):13-18.TAO Zhong,HAN Linhai.Research on the load-deformation hysteretic behaviors of concrete filledsquare steel tubes subjected to compression bending[J].Industrial Construction,2000,30(6):13-18.
[12]薛建阳,赵鸿铁.型钢混凝土框架模型的弹塑性地震反应分析[J].建筑结构学报,2000,21(4):28-33.XUE Jianyang,ZHAO Hongtie.Elastoplastic analysisof seismic responses for steel reinforced concrete framemodel[J].Journal of Building Structures,2000,21(4):28-33.
[13]赵世春.型钢混凝土组合结构结构计算原理[M].成都:西南交通大学出版社,2004:124-143.
[14]陈宗弼,陈星.广州新中国大厦结构设计[J].建筑结构学报,2000,21(3):2-9.CHEN Zongbi,CHEN Xing.Structural design ofGuangzhou New China Mansion[J].Journal ofBuilding Structures,2000,21(3):2-9.
[15]刘永添,李志方.粤财大厦结构设计[J].建筑科学,2001,17(1):46-50.LIU Yongtian,LI Zhifang.Structural design of YuecaiBuilding[J].Building Science,2001,17(1):46-50.
[16]冯宏,李立仁,陈永庆.HSRC框架柱抗震性能的试验研究[J].西南交通大学学报,2010,45(5):705-712.FENG Hong,LI Liren,CHEN Yongqing.Experimental research on aseismic behaviors of high-strength reinforced concrete frame columns[J].Journal of Southwest Jiaotong University,2010,45(5):705-712.
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