配置斜向钢筋的高强混凝土扁柱抗震性能研究
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摘要
为研究高层建筑转换梁节点上扁柱的抗震性能,进行了3个1∶4缩尺模型的低周反复加载试验,对其破坏形态、滞回曲线、极限承载力及延性进行了分析。在试验基础上,利用ABAQUS软件对试件进行了有限元分析;详细讨论了有限元模型的建立、模型材料参数的定义以及斜向钢筋的影响。结果表明:轴压的增大提高了试件的极限承载力,同时也减小了构件的延性;构件荷载-位移滞回曲线饱满,具有较好的耗能能力;在相关参数合理设置的前提下,ABAQUS混凝土损伤塑性模型可用于钢筋混凝土构件的滞回分析;斜向钢筋增加了试件的极限承载力,但位移延性没有明显变化。
In order to study the seismic performance of flat columns on skew girder joint in transfer story of a high-rise building,three low reversed cyclic loading tests on 1∶4 highstrength concrete flat columns were conducted.The failure pattern,hysteresis curve,ultimate bearing capacity and ductility were analyzed.Based on the experiment,the finite element analysis software ABAQUS was used to analyze the specimens.The establishment of the finite element model,definition of the material parameter and the influences of diagonal reinforcements were discussed in detail.The results show that the ultimate bearing capacity of specimens will be higher with vertical force increasing while the ductility will be decreasing,the load-displacement hysteretic curves are in plump-shape,and the flat columns have excellent seismic behavior.In condition of reasonable parameters,ABAQUS concrete damage plasticity model can be well used for hysteretic analysis of reinforced concrete members.Diagonal reinforcements can improve ultimate bearing capacity of specimens,but have no significant effect on the ductility.
In order to study the seismic performance of flat columns on skew girder joint in transfer story of a high-rise building,three low reversed cyclic loading tests on 1∶4 highstrength concrete flat columns were conducted.The failure pattern,hysteresis curve,ultimate bearing capacity and ductility were analyzed.Based on the experiment,the finite element analysis software ABAQUS was used to analyze the specimens.The establishment of the finite element model,definition of the material parameter and the influences of diagonal reinforcements were discussed in detail.The results show that the ultimate bearing capacity of specimens will be higher with vertical force increasing while the ductility will be decreasing,the load-displacement hysteretic curves are in plump-shape,and the flat columns have excellent seismic behavior.In condition of reasonable parameters,ABAQUS concrete damage plasticity model can be well used for hysteretic analysis of reinforced concrete members.Diagonal reinforcements can improve ultimate bearing capacity of specimens,but have no significant effect on the ductility.
引文
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[5]冯庆兴,张文改.TAT软件建模时扁柱的几种处理方法比较[J].建筑结构,2002,32(11):60,25.FENG Qing-xing,ZHANG Wen-gai.Comparison of Different Method for Modeling Flat Columns Using TAT Software[J].Building Structure,2002,32(11):60,25.
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[7]ABAQUS Inc.ABAQUS Theory Manual[M].Warwick:ABAQUS Inc,2006.
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[9]张劲,王庆扬,胡守营,等.ABAQUS混凝土损伤塑性模型参数验证[J].建筑结构,2008,38(8):127-130.ZHANG Jin,WANG Qing-yang,HU Shou-ying,et al.Parameters Verification of Concrete Damaged Plastic Model of ABAQUS[J].Building Structure,2008,38(8):127-130.
[10]BIRTEL V,MARK P.Parameterized Finite Element Modeling of RC Beam Shear Failure[C]//ABAQUS Inc.2006 ABAQUS User's Conference.Boston:ABAQUS Inc,2006:95-108.
[11]GB 50010—2010,混凝土结构设计规范[S].GB 50010—2010,Code for Design of Concrete Structures[S]
[2]郝守祥,李树久.密扁柱框架结构的特点及在小高层住宅中的应用[J].辽宁建材,2005,30(5):47.HAO Shou-xiang,LI Shu-jiu.The Properties and Application of Flat Columns in High Residential Building[J].Liaoning Building Materials,2005,30(5):47.
[3]张国军,吕西林.高轴压比扁柱的抗震性能试验研究[J].建筑结构,2005,35(3):54-56.ZHANG Guo-jun,LU Xi-lin.Experimental Study on Seismic Behavior of Flat Columns with High Axial Compression Ratio[J].Building Structure,2005,35(3):54-56.
[4]史庆轩,门进杰,喻磊.钢筋混凝土扁柱恢复力性能的试验研究和分析[J].防灾减灾工程学报,2007,27(增):344-349.SHI Qing-xuan,MEN Jin-jie,YU Lei.Test and Analysis of Hysteristic Performance of Reinforced Concrete Flat Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2007,27(S):344-349.
[5]冯庆兴,张文改.TAT软件建模时扁柱的几种处理方法比较[J].建筑结构,2002,32(11):60,25.FENG Qing-xing,ZHANG Wen-gai.Comparison of Different Method for Modeling Flat Columns Using TAT Software[J].Building Structure,2002,32(11):60,25.
[6]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.ZHU Bo-long.Seismic Test of Building Structures[M].Beijing:Seismological Press,1989.
[7]ABAQUS Inc.ABAQUS Theory Manual[M].Warwick:ABAQUS Inc,2006.
[8]LGERON F,PAULTRE P.Uniaxial Confinement Model for Normal and High-strength Concrete Columns[J].Journal of Structural Engineering,2003,129(2):241-252.
[9]张劲,王庆扬,胡守营,等.ABAQUS混凝土损伤塑性模型参数验证[J].建筑结构,2008,38(8):127-130.ZHANG Jin,WANG Qing-yang,HU Shou-ying,et al.Parameters Verification of Concrete Damaged Plastic Model of ABAQUS[J].Building Structure,2008,38(8):127-130.
[10]BIRTEL V,MARK P.Parameterized Finite Element Modeling of RC Beam Shear Failure[C]//ABAQUS Inc.2006 ABAQUS User's Conference.Boston:ABAQUS Inc,2006:95-108.
[11]GB 50010—2010,混凝土结构设计规范[S].GB 50010—2010,Code for Design of Concrete Structures[S]
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