配置HRB500大间距纵筋的钢筋混凝土柱抗震性能研究
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摘要
通过对6个配置32大间距高强纵筋和1个普通配筋钢筋混凝土柱的低周反复加载试验,研究了在柱根截断的纵向构造钢筋和轴压比对配置大间距HRB500纵筋的钢筋混凝土柱抗震性能的影响。试验结果表明,当试验轴压比介于0.13~0.21范围时,仅在截面角部集中配置32纵筋的混凝土柱,其水平荷载-位移滞回曲线的饱满度、屈服荷载和峰值荷载均略低,裂缝分布差别不明显;柱内纵向构造钢筋不连续的位置会出现受力薄弱面,影响受力性能;轴压比高的试件极限承载力高,延性相对较差;箍筋肢距对承载力的影响在可接受范围内,柱的承载力计算可采用现行规范中的公式进行。
Six RC columns equipped with 32 high strength and large spacing reinforcement and one ordinary RC column are respectively subjected to quasi-static reversed cyclic loading tests,the effects of constructional reinforcements which are cut off at the bottom and the axial load ratio are discussed. The test results indicate that,the lateral force-displacement hysteretic loops of specimens that configured 32 longitudinal reinforcements only in the corner of the cross section with the test axial load ratios ranging from 0. 13 to 0. 21 are less plump,the yield and peak capacities are lower,while the crack distributions show no significant differences. Weak areas would appear at the bottoms of the specimens,where the constructional reinforcements are cut off. Therefore the performances are influenced. Specimens with higher axial load ratio have better load capacity and worse ductility. The effect of spacing of stirrup legs on resistance is acceptability. The design value of resistance can be calculated according to the code for design of concrete structures GB50010-2010.
Six RC columns equipped with 32 high strength and large spacing reinforcement and one ordinary RC column are respectively subjected to quasi-static reversed cyclic loading tests,the effects of constructional reinforcements which are cut off at the bottom and the axial load ratio are discussed. The test results indicate that,the lateral force-displacement hysteretic loops of specimens that configured 32 longitudinal reinforcements only in the corner of the cross section with the test axial load ratios ranging from 0. 13 to 0. 21 are less plump,the yield and peak capacities are lower,while the crack distributions show no significant differences. Weak areas would appear at the bottoms of the specimens,where the constructional reinforcements are cut off. Therefore the performances are influenced. Specimens with higher axial load ratio have better load capacity and worse ductility. The effect of spacing of stirrup legs on resistance is acceptability. The design value of resistance can be calculated according to the code for design of concrete structures GB50010-2010.
引文
[1]GB 50010-2010,混凝土结构设计规范[S]GB 50010-2010,Code for Design of Concrete Structures[S](in Chinese)
[2]黄小坤,田春雨.预制装配式混凝土结构研究[J].住宅产业,2010,9:28~32Huang Xiao-kun,Tian Chun-yu.Research on Prefabricated Concrete Structure[J].Housing Industry,2010,9:28~32(in Chinese))
[3]陈适才,闫维明,李振宝,等.大型预制混凝土梁柱叠合板中节点整体抗震性能试验研究[J].工程力学,2012,29(2):135~141Chen Shi-cai,Yan Wei-ming,Li Zhen-bao,et al.Experimental Study on Seismic Behavior of Layered Slab and Beam to Column Interior Joints In Precast Concrete Structures[J].Engineering Mechanics,2012,29(2):135~141(in Chinese)
[4]赵斌,吕西林,刘丽珍.全装配式预制混凝土结构梁柱组合件抗震性能试验研究[J].地震工程与工程振动,2005,25(1):81~87Zhao Bin,Lu Xi-lin,Liu Li-zhen.Experimental Study on Seismic Behavior of Precast Concrete Beam-Column Subassemblage with Fully Assembled Joint[J].Earthquake Engineering and Engineering Vibration,2005,25(1):81~87(in Chinese)
[5]薛伟辰,杨新磊,王蕴,等.六层两跨现浇柱预制梁框架抗震性能试验研究[J].建筑结构学报,2008,29(6):25~32Xue Wei-chen,Yang Xin-lei,Wang Yun,et al.Experimental Study on Seismic Behavior of Six-Story Two-Bay Frame with Precast Beams and Cast-in-place Columns[J].Journal of Building Structures,2008,29(6):25~32(in Chinese)
[6]柳炳康,宋满荣,蒋亚琼,等.预制预应力混凝土装配整体式框架抗震性能试验研究[J].建筑结构学报,2011,32(2):24~32Liu bing-kang,Song Man-rong,Jiang Ya-qiong,et al.Experimental Study on Seismic Performance of PostTensioned Precast Prestressed Concrete Frame[J].Journal of Building Structures,2011,32(2):24~32(in Chinese)
[7]王墩,吕西林,卢文胜.带接缝连接梁的预制混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2013,34(10):1~11Wang Dun,Lu Xi-lin,Lu Wen-sheng.Experimental Study on Seismic Performance of Precast Concrete Shear Walls with Joint Connecting Beam[J].Journal of Building Structures,2013,34(10):1~11(in Chinese)
[8]GB/T 50152-2012,混凝土结构试验方法标准[S]GB 50152-2012,Standard for Test Method of Concrete Structures[S](in Chinese)
[9]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989.Tang Jiu-ru.Seismic Resistance of Joints In Reinforced Concrete Frames[M].Nanjing:Southeast University Press,1989(in Chinese)
[10]殷小溦,黄小坤,田春雨,等.配置大间距高强纵筋的钢筋混凝土柱抗震性能试验研究[J].建筑结构学报,2016,37(8):41~47Yin Xiao-wei,Huang Xiao-kun,Tian Chun-yu,et al.Experimental Study on Seismic Behaviors of RC Columns with Large Spacing and High Strength Longitudinal Reinforcements[J].Journal of Building Structures,2016,37(8):41~47(in Chinese)
[2]黄小坤,田春雨.预制装配式混凝土结构研究[J].住宅产业,2010,9:28~32Huang Xiao-kun,Tian Chun-yu.Research on Prefabricated Concrete Structure[J].Housing Industry,2010,9:28~32(in Chinese))
[3]陈适才,闫维明,李振宝,等.大型预制混凝土梁柱叠合板中节点整体抗震性能试验研究[J].工程力学,2012,29(2):135~141Chen Shi-cai,Yan Wei-ming,Li Zhen-bao,et al.Experimental Study on Seismic Behavior of Layered Slab and Beam to Column Interior Joints In Precast Concrete Structures[J].Engineering Mechanics,2012,29(2):135~141(in Chinese)
[4]赵斌,吕西林,刘丽珍.全装配式预制混凝土结构梁柱组合件抗震性能试验研究[J].地震工程与工程振动,2005,25(1):81~87Zhao Bin,Lu Xi-lin,Liu Li-zhen.Experimental Study on Seismic Behavior of Precast Concrete Beam-Column Subassemblage with Fully Assembled Joint[J].Earthquake Engineering and Engineering Vibration,2005,25(1):81~87(in Chinese)
[5]薛伟辰,杨新磊,王蕴,等.六层两跨现浇柱预制梁框架抗震性能试验研究[J].建筑结构学报,2008,29(6):25~32Xue Wei-chen,Yang Xin-lei,Wang Yun,et al.Experimental Study on Seismic Behavior of Six-Story Two-Bay Frame with Precast Beams and Cast-in-place Columns[J].Journal of Building Structures,2008,29(6):25~32(in Chinese)
[6]柳炳康,宋满荣,蒋亚琼,等.预制预应力混凝土装配整体式框架抗震性能试验研究[J].建筑结构学报,2011,32(2):24~32Liu bing-kang,Song Man-rong,Jiang Ya-qiong,et al.Experimental Study on Seismic Performance of PostTensioned Precast Prestressed Concrete Frame[J].Journal of Building Structures,2011,32(2):24~32(in Chinese)
[7]王墩,吕西林,卢文胜.带接缝连接梁的预制混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2013,34(10):1~11Wang Dun,Lu Xi-lin,Lu Wen-sheng.Experimental Study on Seismic Performance of Precast Concrete Shear Walls with Joint Connecting Beam[J].Journal of Building Structures,2013,34(10):1~11(in Chinese)
[8]GB/T 50152-2012,混凝土结构试验方法标准[S]GB 50152-2012,Standard for Test Method of Concrete Structures[S](in Chinese)
[9]唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989.Tang Jiu-ru.Seismic Resistance of Joints In Reinforced Concrete Frames[M].Nanjing:Southeast University Press,1989(in Chinese)
[10]殷小溦,黄小坤,田春雨,等.配置大间距高强纵筋的钢筋混凝土柱抗震性能试验研究[J].建筑结构学报,2016,37(8):41~47Yin Xiao-wei,Huang Xiao-kun,Tian Chun-yu,et al.Experimental Study on Seismic Behaviors of RC Columns with Large Spacing and High Strength Longitudinal Reinforcements[J].Journal of Building Structures,2016,37(8):41~47(in Chinese)