不同轴压比钢筋混凝土核心筒抗震性能
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摘要
为了进一步研究钢筋混凝土核心筒体的抗震性能和影响因素,在国内外试验研究的基础上对2个较大比例、大高宽比的钢筋混凝土核心筒试件进行了水平低周反复荷载试验,重点研究了不同轴压比下核心筒的破坏机理、承载能力、耗能能力、延性、剪力滞后等方面的抗震性能.研究发现,核心筒试件最后均为底部发生整体弯曲破坏,随着轴压比值从0.2增加到0.5,核心筒试件的刚度和承载能力有明显提高,但同时延性性能显著下降.分析表明:轴压比对钢筋混凝土核心筒的抗震性能有较大影响.
In order to further study the seismic behavior of reinforced concrete core wall and factors influencing,two reinforced concrete core wall models with large height-width ratio were built and tested to failure under the combined action of constant axial load and reversed cyclic lateral load.The axial compression ratio on each core wall was different.This paper presents the results,including failure mode,hysteretic behavior,load-carrying capacity,ductility,energy dissipation ability,shear lag effect.The final overall bending damage occurred at the bottom of each model.With the axial compression ratio increasing from 0.2 to 0.5,stiffness and load-carrying capacity of the specimen had risen markedly,but the ductility performance dropped significantly.It can be seen from the analysis that the axial compression ratio having important effect on the seismic behavior of reinforced concrete core wall.
In order to further study the seismic behavior of reinforced concrete core wall and factors influencing,two reinforced concrete core wall models with large height-width ratio were built and tested to failure under the combined action of constant axial load and reversed cyclic lateral load.The axial compression ratio on each core wall was different.This paper presents the results,including failure mode,hysteretic behavior,load-carrying capacity,ductility,energy dissipation ability,shear lag effect.The final overall bending damage occurred at the bottom of each model.With the axial compression ratio increasing from 0.2 to 0.5,stiffness and load-carrying capacity of the specimen had risen markedly,but the ductility performance dropped significantly.It can be seen from the analysis that the axial compression ratio having important effect on the seismic behavior of reinforced concrete core wall.
引文
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[6]曹万林，黄选明，卢智成，等．钢筋混凝土带暗支撑核心简体抗震性能试验研究[J]．地震工程与工程振动，2005，25 (3)：81—86．CAO Wan-lin,HUANG Xuan-ming,LU Zhi-cheng,et al.Experimental study on seismic behavior of reinforced concrete core walls with concealed bracings[J].Earthquake Engineering and Engineering Vibration,2005,25(3):81-86. (in Chinese)
[7]曹万林，张建伟，黄选明，等．带暗支撑短肢剪力墙及核心筒抗震研究与应用[J]．工程力学，2005，22(增刊)：94-106．CAO Wan-lin,ZHANG Jian-wei,HUANG Xuan-ming,et al.Seismic performance and engineering application of RC short- pier shear walls and core walls with concealed bracings[J].Engineering Mechanics,2005,22(supp.):94-106.(in Chinese)
[8]吕西林，李俊兰．钢筋混凝土核心筒体抗震性能试验研究[J]．地震工程与工程振动，2002，22(3)：42—50．L(?)Xi-lin,LI Jun-lan.Seismic behavior of reinforced concrete core walls subjected to cyclic loading[J].Earthquake Engineering and Engineering Vibration,2002,22(3):42-50.(in Chinese)
[2]HABASAKI A,KITADA Y,NISHIKAWA T,et al.Multi-directional loading test for RC seismic shear walls[C]// Proceedings of the 12th WCEE.New Zealand:The New Zealand Society for Earthquake Engineering,2000:454.
[3]MARUTA M,SUZUKI N,MIYASHITA T,et al.Structural capacities of h-shaped RC core wall subjected to lateral load and torsion[C]//Proceedings of the 12th WCEE.New Zealand:The New Zealand Society for Earthquake Engineering, 2000:1028.
[4]SUGAYA K,TESHIGAWARA M,KATO M,et al.Experimental study on carrying shear force ratio of 12-storey coupled shear wall[C]//Proceedings of the 12th WCEE.New Zealand:The New Zealand Society for Earthquake Engineering, 2000:2152.
[5]SUGAYA K,KATO M,TESHIGAWARA M,et al.Parametric simulating study on the effect of coupling beams on the carrying shear force ratio in 12-story coupled shear walls[C]//Proceedings of the 13th WCEE.Canada:Canadian Association for Earthquake Engineering,2004:1847.
[6]曹万林，黄选明，卢智成，等．钢筋混凝土带暗支撑核心简体抗震性能试验研究[J]．地震工程与工程振动，2005，25 (3)：81—86．CAO Wan-lin,HUANG Xuan-ming,LU Zhi-cheng,et al.Experimental study on seismic behavior of reinforced concrete core walls with concealed bracings[J].Earthquake Engineering and Engineering Vibration,2005,25(3):81-86. (in Chinese)
[7]曹万林，张建伟，黄选明，等．带暗支撑短肢剪力墙及核心筒抗震研究与应用[J]．工程力学，2005，22(增刊)：94-106．CAO Wan-lin,ZHANG Jian-wei,HUANG Xuan-ming,et al.Seismic performance and engineering application of RC short- pier shear walls and core walls with concealed bracings[J].Engineering Mechanics,2005,22(supp.):94-106.(in Chinese)
[8]吕西林，李俊兰．钢筋混凝土核心筒体抗震性能试验研究[J]．地震工程与工程振动，2002，22(3)：42—50．L(?)Xi-lin,LI Jun-lan.Seismic behavior of reinforced concrete core walls subjected to cyclic loading[J].Earthquake Engineering and Engineering Vibration,2002,22(3):42-50.(in Chinese)
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