高轴力下钢筋混凝土异形柱节点受力性能研究
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摘要
由于异形柱特殊的截面形式,地震作用下,较高轴压比时异形柱节点与普通矩形柱节点相比破坏更为严重。通过钢筋混凝土异形柱边节点和中间节点低周反复荷载试验,分析了高轴力下异形柱边节点和中间节点核心区混凝土裂缝发展及破坏情况,并利用试验数据计算得到节点核心区受剪承载力,最后结合节点核心区箍筋应变变化规律初步探讨了异形柱节点的抗剪机理。研究表明,高轴力下异形柱节点剪力较大,核心区腹板混凝土开裂破坏较严重,成为异形柱结构抗震的一个薄弱环节,限制了异形柱结构楼层高度。
Because of special section shape,the joints with specially shaped columns under high axial compression ratio will damage more seriously than the joints with ordinary rectangular columns when suffering earthquakes.Through the low frequency cyclic loading experiment of an exterior joint and a middle joint with specially shaped column,the development and destruction of concrete cracks of the joints with specially shaped columns under high axial force were analyzed,the shearing strength of the joints core were calculated by experiment data,and the shear mechanism of the joints with specially shaped column was investigated combined with the stirrup strain distributed in joint core.It is shown that the joint with specially shaped column under high axial force have larger shear,and the concrete in web of joint core will be cracking more seriously,so joints become the weakness site of the structure with specially shaped columns,thus restricting the storey height of structure.
Because of special section shape,the joints with specially shaped columns under high axial compression ratio will damage more seriously than the joints with ordinary rectangular columns when suffering earthquakes.Through the low frequency cyclic loading experiment of an exterior joint and a middle joint with specially shaped column,the development and destruction of concrete cracks of the joints with specially shaped columns under high axial force were analyzed,the shearing strength of the joints core were calculated by experiment data,and the shear mechanism of the joints with specially shaped column was investigated combined with the stirrup strain distributed in joint core.It is shown that the joint with specially shaped column under high axial force have larger shear,and the concrete in web of joint core will be cracking more seriously,so joints become the weakness site of the structure with specially shaped columns,thus restricting the storey height of structure.
引文
[1]JGJ 149-2006,混凝土异形柱结构技术规程[S].
[2]WANG Tie-cheng,LI Xin-hua,ZHAO Shao-wei.Seismic behavior of frame with specially shaped columns subjected to cyclic load[J].Transactions of Tianjin University,2007,13(5):340-343.
[3]CHENG H,THOMAS T.T-shaped reinforced concrete members under biaxial bending and axial compression[J].ACI Structural Jour-nal,1989,86(4):460-468.
[4]李杰,吴建营,周德源,等.L形和Z形宽肢异形柱低周反复荷载试验研究[J].建筑结构学报(Journal of Building Structures),2002,23(1):9-15.
[5]郭棣,吴敏哲,谢异同.宽肢T形柱的滞回特性及耗能分析[J].世界地震工程(World Earthquake Engineering),2002,18(2):146-149.
[6]陈宗平,薛建阳,赵鸿铁,等.低周反复荷载作用下型钢混凝土异形柱的抗剪承载力分析[J].土木工程学报(China Civil EngineeringJournal),2007,40(7):30-36.
[7]赵艳静,李忠献,陈云霞.四级抗震等级时钢筋混凝土异形柱轴压比限值的研究[J].建筑工程学报(Journal of Building Structures),2004,25(3):58-62.
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[10]王滋军,刘伟庆,蒋永生,等.中高层钢筋混凝土异形柱框架结构试验与理论研究[J].地震工程与工程振动(Earthquake Engineeringand Engineering Vibration),2002,22(5):62-65.
[11]黄珏,肖建庄,葛亚杰,等.异形柱框架节点受力性能研究进展与评述[J].结构工程师(Structural Engineers),2002(1):52-57.
[12]陈昌宏,单建,马乐为,等.钢筋混凝土异形柱框架节点抗震性能试验[J].工业建筑(Industrial Building),2007,37(2):6-10.
[13]张仲先,黄彩萍.柱轴力对框架外节点核心区水平抗剪能力的影响[J].华中科技大学学报(Journal of Huazhong University of Scienceand Technology),2006,23(4):20-22.
[14]傅剑平,张笛川,陈滔,等.中等偏高剪压比抗震节点传力机理及性能试验[J].重庆大学学报(Journal of Chongqing University),2005,28(6):84-90.
[15]傅剑平,陈小英,陈滔,等.中低剪压比框架节点抗震机理的试验研究[J].重庆建筑大学学报(Journal of Chongqing Jianzhu Universi-ty),2005,27(1):41-47.
[16]陈曦,陈春雷.简述钢管混凝土的几种改进形式[J].河北工业科技(Hebei Journal of Industrial Science and Technology),2009,26(2):112-117.
[17]邵莲芬,贾志刚.某工程混凝土强度不足的原因和事故处理方法[J].河北工业科技(Hebei Journal of Industrial Science and Technolo-gy),2009,26(1):20-23.
[2]WANG Tie-cheng,LI Xin-hua,ZHAO Shao-wei.Seismic behavior of frame with specially shaped columns subjected to cyclic load[J].Transactions of Tianjin University,2007,13(5):340-343.
[3]CHENG H,THOMAS T.T-shaped reinforced concrete members under biaxial bending and axial compression[J].ACI Structural Jour-nal,1989,86(4):460-468.
[4]李杰,吴建营,周德源,等.L形和Z形宽肢异形柱低周反复荷载试验研究[J].建筑结构学报(Journal of Building Structures),2002,23(1):9-15.
[5]郭棣,吴敏哲,谢异同.宽肢T形柱的滞回特性及耗能分析[J].世界地震工程(World Earthquake Engineering),2002,18(2):146-149.
[6]陈宗平,薛建阳,赵鸿铁,等.低周反复荷载作用下型钢混凝土异形柱的抗剪承载力分析[J].土木工程学报(China Civil EngineeringJournal),2007,40(7):30-36.
[7]赵艳静,李忠献,陈云霞.四级抗震等级时钢筋混凝土异形柱轴压比限值的研究[J].建筑工程学报(Journal of Building Structures),2004,25(3):58-62.
[8]王铁成,林海,康谷贻,等.钢筋混凝土异形柱框架试验及静力弹塑性分析[J].天津大学学报(Journal of Tianjin University),2006,39(12):1 457-1 464.
[9]王铁成,张学辉,康谷贻.两种混凝土异形柱框架抗震性能试验对比[J].天津大学学报(Journal of Tianjin University),2007,40(7):791-798.
[10]王滋军,刘伟庆,蒋永生,等.中高层钢筋混凝土异形柱框架结构试验与理论研究[J].地震工程与工程振动(Earthquake Engineeringand Engineering Vibration),2002,22(5):62-65.
[11]黄珏,肖建庄,葛亚杰,等.异形柱框架节点受力性能研究进展与评述[J].结构工程师(Structural Engineers),2002(1):52-57.
[12]陈昌宏,单建,马乐为,等.钢筋混凝土异形柱框架节点抗震性能试验[J].工业建筑(Industrial Building),2007,37(2):6-10.
[13]张仲先,黄彩萍.柱轴力对框架外节点核心区水平抗剪能力的影响[J].华中科技大学学报(Journal of Huazhong University of Scienceand Technology),2006,23(4):20-22.
[14]傅剑平,张笛川,陈滔,等.中等偏高剪压比抗震节点传力机理及性能试验[J].重庆大学学报(Journal of Chongqing University),2005,28(6):84-90.
[15]傅剑平,陈小英,陈滔,等.中低剪压比框架节点抗震机理的试验研究[J].重庆建筑大学学报(Journal of Chongqing Jianzhu Universi-ty),2005,27(1):41-47.
[16]陈曦,陈春雷.简述钢管混凝土的几种改进形式[J].河北工业科技(Hebei Journal of Industrial Science and Technology),2009,26(2):112-117.
[17]邵莲芬,贾志刚.某工程混凝土强度不足的原因和事故处理方法[J].河北工业科技(Hebei Journal of Industrial Science and Technolo-gy),2009,26(1):20-23.
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