短肢剪力墙应变演化及破坏模式分析
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摘要
由于应力重分布,钢筋混凝土结构在地震作用下的应力分布变化多端、复杂,其变化过程可从应变分布演化过程来反映。通过追踪6个T形截面短肢剪力墙的应变演化过程,还原了试件在低周反复荷载作用下的应力变化全过程。在上述基础上,对试件的破坏模式做出了准确的分析,进而准确地找出了试件的薄弱部位、提出了一些加固意见,并探讨了平截面假定的适用性。
Stress distribution is complex and changeable drastically in RC structure under earthquake effect because of stress redistribution,the changing process can be reflected through strain evolution.Stress changing process reappeared by tracing strain evolution of six T-shaped short pier shear wall specimens under low cyclic loading.Based on the above research,failure mode of specimens was accurately analyzed to find the weakest parts of the specimens.Some suggestions were proposed for strengthening the weakest parts,the applicability of plane-section assumption was investigated too.
Stress distribution is complex and changeable drastically in RC structure under earthquake effect because of stress redistribution,the changing process can be reflected through strain evolution.Stress changing process reappeared by tracing strain evolution of six T-shaped short pier shear wall specimens under low cyclic loading.Based on the above research,failure mode of specimens was accurately analyzed to find the weakest parts of the specimens.Some suggestions were proposed for strengthening the weakest parts,the applicability of plane-section assumption was investigated too.
引文
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[9]李青宁,李小蕾,雷伟宁.T形与L形短肢剪力墙破坏规律及刚度延性研究[J].建筑结构,2010,40(2):37-40.Li Qingning,Li Xiaolei,Lei Weining.Study on destruction law and stiffness ductility of T-Shaped and L-shaped short shear wall[J].BuildingStructure,2010,40(2):37-40.
[10]张品乐,李青宁,李晓蕾.L形截面短肢剪力墙抗震性能的模型试验研究[J].地震工程与工程震动,2010,30(4):51-56.Zhang Pin-le,Li Qingning,Li Xiaolei.Experimental research on seismic performance of short pier shear wall with L-shaped section[J].Earthquake Engineering And Engineering Vibration,2010,30(4):51-56.
[2]容柏生.高层住宅建筑中的短肢剪力墙结构体系[J].建筑结构学报,1997,18(6):14-19.Rong Baisheng.Short-leg shear wall structural system used in tall residential buildings[J].Journal of Building Structures,1997,18(6):14-19.
[3]李青宁,王宁,蔡卫宁.T形短肢剪力墙弹塑性模型及地震反应分析.地震工程与工程振动.2004.24(2):69-74.Li Qingning,Wang Ning,Cai Weining.Elastoplastic model and seismic analysis of T-Shaped short-leg shear wall[J].Earthquake EngineeringAnd Engineering Vibration,2004,24(2):69-74.
[4]李青宁,张军某,罗时磊,等.短肢剪力墙剪滞效应的变分解法[J].西安建筑科技大学学报(自然科学版),2004,36(1):32-36.Li Qingning,Zhang Junmou,Luo Shilei,et al.Variational solution of shear-lag effect of short-leg shear wall[J].J.Xi’an Univ.of Arch.&Tech.(Natural Science Edition),2004,36(1):32-36.
[5]李奎明,孙春毅,李杰.高性能混凝土双连梁短肢剪力墙试验研究[J].地震工程与工程震动,2006,26(3):121-123.Li Kuiming,Sun Cunyi,Li Jie.Experimental study on HPC short-leg shear wall with a pair of beams[J].Earthquake Engineering And Engi-neering Vibration,2006,26(3):121-123.
[6]陆浩亮,李思明,金国芳,等.高层建筑转换梁上短肢剪力墙抗震试验和分析[J].地震工程与工程震动,2005,25(2):77-81.LU Haoliang,Li Siming,Jin Guofang,et al.Tests and finite element analysis of earthquake resistant capability of shallow-section shear walls ontransfer floor of a tall building[J].Earthquake Engineering And Engineering Vibration,2005,25(2):77-81.
[7]陈娟.钢筋混凝土L形柱分析时平截面假定的适用范围[J].地震工程与工程震动,2006,1(26):111-115.Chen Juan,Chen Tao,Huang Zongming.Applicable range of plane-section assumption in analysis of L-shaped RC columns[J].EarthquakeEngineering And Engineering Vibration,2006,1(26):111-115.
[8]郭棣.宽肢异形柱的试验研究[D].西安:西安建筑科技大学,2005.Guo Di.Experiment and Study on the Broad-limb Special-shaped Column[D].Xian:Xian University of architecture and technology,2005.
[9]李青宁,李小蕾,雷伟宁.T形与L形短肢剪力墙破坏规律及刚度延性研究[J].建筑结构,2010,40(2):37-40.Li Qingning,Li Xiaolei,Lei Weining.Study on destruction law and stiffness ductility of T-Shaped and L-shaped short shear wall[J].BuildingStructure,2010,40(2):37-40.
[10]张品乐,李青宁,李晓蕾.L形截面短肢剪力墙抗震性能的模型试验研究[J].地震工程与工程震动,2010,30(4):51-56.Zhang Pin-le,Li Qingning,Li Xiaolei.Experimental research on seismic performance of short pier shear wall with L-shaped section[J].Earthquake Engineering And Engineering Vibration,2010,30(4):51-56.
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