RC框架空间夹心角节点的抗震性能研究
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摘要
设计了6个不同强度等级以及6个不同轴压比、剪压比的RC框架空间角节点的MARC有限元模型,在低周往复荷载作用下,对比分析传统角节点与夹心角节点抗震性能的差别;讨论梁柱混凝土相差几个等级时夹心节点可以代替传统节点;并探讨了轴压比、剪压比对夹心角节点抗震性能的影响。结果表明:当剪压比较低、轴压比较高时,梁柱混凝土强度相差6个等级时核心区可以采用梁的混凝土来浇筑;剪压比为中等较低时,随轴压比的增大,夹心角节点的抗震性能提高;当轴压比较低时,随剪压比的增大,其抗震性能降低。
6 different strength grade concrete in the joints of beam and column and 6 sandwich joints with different axial stress ratio and shear-compression ratio are established by MSC. MARC. The differences of the seismic behavior between the traditional joints and sandwich joints are compared under the low period-recapitulate load. Discussion of several grades concrete between the beam and column is conducted when the sandwich joints can instead of the traditional joint,and the effect of axial stress ratio and the shearcompression ratio on the sandwich corner joints is studied. The results show that the joints can use the beams' concrete in 6 different strength grade concrete when the axial stress ratio is higher and the shear-compression ratio is lower. When the shear-compression ratio is middle or slightly low,the seismic capacity of spatial sandwich corner joints is improved by the increase of the axial stress ratio.When the axial stress ratio is lower,the seismic capacity is decreased by the increase of the shear-compression ratio.
6 different strength grade concrete in the joints of beam and column and 6 sandwich joints with different axial stress ratio and shear-compression ratio are established by MSC. MARC. The differences of the seismic behavior between the traditional joints and sandwich joints are compared under the low period-recapitulate load. Discussion of several grades concrete between the beam and column is conducted when the sandwich joints can instead of the traditional joint,and the effect of axial stress ratio and the shearcompression ratio on the sandwich corner joints is studied. The results show that the joints can use the beams' concrete in 6 different strength grade concrete when the axial stress ratio is higher and the shear-compression ratio is lower. When the shear-compression ratio is middle or slightly low,the seismic capacity of spatial sandwich corner joints is improved by the increase of the axial stress ratio.When the axial stress ratio is lower,the seismic capacity is decreased by the increase of the shear-compression ratio.
引文
[1]GB50011-2010,建筑抗震设计规范[S]GB50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[2]JGJ3-2010,高层建筑混凝土结构技术规程[S]JGJ3-2010,Technical Specification for Concrete Structure of Tall Building[S](in Chinese)
[3]Bianchini C A,Woods E R,Kesler E C.Effect of Floor Concrete Strength on Column Strength[J].Journal of the American Concrete Institute,1960,31(11):1149~1169
[4]Lee S C,Mendis P.Behavior of High-strength Concrete Corner Columns Intersected by Weaker Slabs with Different Thicknesses[J].ACI Structural Journal,2004,101(1):11~18
[5]程懋堃.高强混凝土柱的梁柱节点处理方法[J].建筑结构,2001,31(5):3~5Cheng Mao-kun.The Construction Method of The Beamcolumn Joints with High Strength Concrete Column[J].Industrial Construction,2001,31(5):3~5(in Chinese)
[6]余琼,李思明.核心区和柱混凝土强度不等时节点的性能研究[J].同济大学学报(自然科学版),2004,32(12):1583~1588Yu Qiong,Li Si-ming.Research on Frame’s Joint that Concrete Strength of Core is Inferior to That of Column[J]Journal of Tongji University(Natural Science),2004,32(12):1583~1588(in Chinese)
[7]杨治洪.框架夹心节点抗震性能及设计方法研究[D].重庆:重庆大学,2010Yang Zhi-hong.Seismic Behavior and Design Method of RC Sandwich Beam-column Joints[D].Chongqing:Chongqing University,2010(in Chinese)
[8]段建中,刘立兵,方高倪,等.不同强度混凝土梁柱节点承载性能研究[J].合肥工业大学学报(自然科学版),2004,27(4):376~400Duan Jian-zhong,Liu Li-bing,Fang Gao-ni,et.al.Experimental Research on Interior Beam-column Joints as the Column and Beam are Constructed with Different Strength Concrete[J].Journal of Hefei University of Technology(Natural Science),2004,27(4):376-400(in Chinese)
[9]GB50010-2010,混凝土结构设计规范[S]GB50010-2010,Code for Design of Concrete Structures[S](in Chinese)
[10]李丽.框架夹芯节点受力性能分析[D].南京:东南大学,2009Li Li.Research on Bearing Performance of Reinforced Concreie Frame Joints with the Low Concrete Strength[D]Nanjing:Southeast University,2009(in Chinese)
[2]JGJ3-2010,高层建筑混凝土结构技术规程[S]JGJ3-2010,Technical Specification for Concrete Structure of Tall Building[S](in Chinese)
[3]Bianchini C A,Woods E R,Kesler E C.Effect of Floor Concrete Strength on Column Strength[J].Journal of the American Concrete Institute,1960,31(11):1149~1169
[4]Lee S C,Mendis P.Behavior of High-strength Concrete Corner Columns Intersected by Weaker Slabs with Different Thicknesses[J].ACI Structural Journal,2004,101(1):11~18
[5]程懋堃.高强混凝土柱的梁柱节点处理方法[J].建筑结构,2001,31(5):3~5Cheng Mao-kun.The Construction Method of The Beamcolumn Joints with High Strength Concrete Column[J].Industrial Construction,2001,31(5):3~5(in Chinese)
[6]余琼,李思明.核心区和柱混凝土强度不等时节点的性能研究[J].同济大学学报(自然科学版),2004,32(12):1583~1588Yu Qiong,Li Si-ming.Research on Frame’s Joint that Concrete Strength of Core is Inferior to That of Column[J]Journal of Tongji University(Natural Science),2004,32(12):1583~1588(in Chinese)
[7]杨治洪.框架夹心节点抗震性能及设计方法研究[D].重庆:重庆大学,2010Yang Zhi-hong.Seismic Behavior and Design Method of RC Sandwich Beam-column Joints[D].Chongqing:Chongqing University,2010(in Chinese)
[8]段建中,刘立兵,方高倪,等.不同强度混凝土梁柱节点承载性能研究[J].合肥工业大学学报(自然科学版),2004,27(4):376~400Duan Jian-zhong,Liu Li-bing,Fang Gao-ni,et.al.Experimental Research on Interior Beam-column Joints as the Column and Beam are Constructed with Different Strength Concrete[J].Journal of Hefei University of Technology(Natural Science),2004,27(4):376-400(in Chinese)
[9]GB50010-2010,混凝土结构设计规范[S]GB50010-2010,Code for Design of Concrete Structures[S](in Chinese)
[10]李丽.框架夹芯节点受力性能分析[D].南京:东南大学,2009Li Li.Research on Bearing Performance of Reinforced Concreie Frame Joints with the Low Concrete Strength[D]Nanjing:Southeast University,2009(in Chinese)