高强混凝土扁柱拟静力试验
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摘要
为研究高强混凝土扁柱的抗震性能,以6根缩尺模型为1∶3的不同轴压比、混凝土强度、剪跨比扁柱试件为研究对象,采用拟静力试验方法,通过对试验现象的观察以及试验数据的处理,定量地从刚度、骨架曲线、滞回曲线、延性、耗能能力等几个方面详细分析了试验试件的抗震性能.研究结果表明,此类构件延性较差,耗能能力差,但在合理构造措施下,破坏形式仍为压弯型,破坏截面符合平截面假定.
In order to research seismic performance of flat column made of high-strength concrete,pseudo-static tests are conducted,which include six 1:3-scaled flat columns with different axial compression ratios,concrete strengths and shear span ratios.By observing the test phenomenon and analyzing the data,the seismic performance of the columns including stiffness,skeleton curves,hysteresis curves,ductility and energy dissipation are obtained.It is concluded that flat columns have poor ductility and energy dissipation capacity.Based on the proper seismic measures,failure characteristic is compression-flexure destruction and the failure section conforms to the assumption of plane cross section.
In order to research seismic performance of flat column made of high-strength concrete,pseudo-static tests are conducted,which include six 1:3-scaled flat columns with different axial compression ratios,concrete strengths and shear span ratios.By observing the test phenomenon and analyzing the data,the seismic performance of the columns including stiffness,skeleton curves,hysteresis curves,ductility and energy dissipation are obtained.It is concluded that flat columns have poor ductility and energy dissipation capacity.Based on the proper seismic measures,failure characteristic is compression-flexure destruction and the failure section conforms to the assumption of plane cross section.
引文
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[2]Razvi S,Saatcioglu M.Confinement model for highstrengthconcrete[J].Journal of Structural Engineering,1999,25(3):281.
[3]肖岩,伍云天,尚守平.高强混凝土柱抗震性能的足尺试验研究及理论分析[J].东南大学学报:自然科学版,2002,32(5):746.XIAO Yan,WU Yuntian,SHANG Shouping.Experimental andanalytical studies on full-scale high-strength concrete columns[J].Journal of Southeast University:Natural Science Edition,2002,32(5):746.
[4]张国军,吕西林.高强混凝土框架柱的地震损伤模型[J].地震工程与工程振动,2005,25(2):100.ZHANG Guojun,LXilin.Seismic damage model of highstrength reinforced concrete frame columns[J].EarthquakeEngineering and Engineering Vibration,2005,25(2):100.
[5]Saatcioglu M,Razvi S R.Strength and ductility of confinedconcrete[J].Journal of Structural Engineering,1992,118(6):1590.
[6]Scott B D,Park R,Priestley N.Stress-strain behavior ofconcrete confined by overlapping hoops at low and high strainrates[J].1982,79(1):13.
[7]Samra R M.Ductility analysis of confined columns[J].Journalof Building Structures,1990,116(11):3148.
[8]张荣,苏小卒.竖向加预应力钢筋混凝土柱抗震性能试验研究[J].同济大学学报:自然科学版,2006,34(12):1578.ZHANG Rong,SU Xiaozu.Experimental study on aseismicbehavior of R.C.columns with vertical prestressing[J].Journal of Tongji University:Natural Science,2006,34(12):1578.
[9]李奎明,李杰.钢筋混凝土双连梁短肢剪力墙结构试验研究[J].同济大学学报:自然科学版,2009,37(5):587.LI Kuiming,LI Jie.Experimental study on reinforced concreteshort-leg shear walls with dual binding beams[J].Journal ofTongji University:Natural Science,2009,37(5):587.
[10]中华人民共和国住房和城乡建设部.GB50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010.Ministry of Housing and Urban-Rural Development of thePeople’s Republic of China.GB50017—2010 Code for designof concrete structures[S].Beijing:China Architecture andBuilding Press,2010.
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