钢筋混凝土梁板柱空间节点抗震性能试验研究
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摘要
通过对一个钢筋混凝土框架中柱空间梁柱节点和一个带现浇楼板空间节点在平面内施加低周反复荷载以及对一个带板空间节点在斜向施加低周反复荷载,深入研究了空间节点在平面内加载和斜向加载下的破坏形态,滞回性能等抗震性能。试验结果表明:在正向弯矩作用下,带板试件梁端承载力略有提高,延性发展直至纵筋拉断;在负向弯矩作用下,带板试件由于板筋参与工作承载力提高2倍以上,变形能力受受压区混凝土破坏控制,与无板试件相当;带板试件在斜向荷载作用下由于相邻梁上作用弯矩相反,减少了板筋参与工作范围,承载力略低。
Experiments on reinforced concrete frame spatial beam-slab-column joints are conducted under low cyclic repeated loadings.Failure modes,hysteresis curves and other seismic performance of the spatial joints are investigated.Experiment results show that under the action of the positive moment,the bearing capacity of beam-slab-column joint is increased just a little and the displacment has developped fully until the beam steel reached its tension failure state;under the action of the negative moment,the bearing capacity of beam-slab-column joints have been increased by more than 2 times for the participation effect of the slab steel and the deformability is controlled by the damage of the compression area concrete,which is familiar with the beam-column joint,the bearing capacity of the joint with slab under the action of oblique direction loading is a little lower than the strength of the joint which is loaded in-plane.
Experiments on reinforced concrete frame spatial beam-slab-column joints are conducted under low cyclic repeated loadings.Failure modes,hysteresis curves and other seismic performance of the spatial joints are investigated.Experiment results show that under the action of the positive moment,the bearing capacity of beam-slab-column joint is increased just a little and the displacment has developped fully until the beam steel reached its tension failure state;under the action of the negative moment,the bearing capacity of beam-slab-column joints have been increased by more than 2 times for the participation effect of the slab steel and the deformability is controlled by the damage of the compression area concrete,which is familiar with the beam-column joint,the bearing capacity of the joint with slab under the action of oblique direction loading is a little lower than the strength of the joint which is loaded in-plane.
引文
[1]GB50011-2010建筑抗震设计规范[S].GB50011-2010China Structure Aseismic Design Code[S].
[2]王威,薛建阳,章红梅,等.框架结构在汶川5.12大地震中的震害分析及抗震启示[J].世界地震工程,2009,25(4):131-135.WANG Wei,XUE Jianyang,ZHANG Hongmei,et al.Seismic design and lessons learnt form the earthquake disaster of frame structures in 5.12Wenchuan earthquake[J].World Earthquake Engineering,1993,13(1):77-87.
[3]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 Jiuru.Seismic resistance of joints in reinforced concrete frame[M].Nanjing:Southeast University Press,1989.
[4]吴勇,雷汲川,杨红,等.板筋参与梁端负弯矩承载力问题的探讨[J].重庆大学建筑学报,2002,24(3):33-37.WUYong,LEI Jichuan,YANG Hong,et al.Discussion on negative flexural strength of beams including slabs[J].Journal of Chongqing University(Architecture Ed ion),2002,24(3):33-37.
[5]Pantazopoulou SJ,Moehle J P.Identification of effect of salbs on flexural behavior of beams[J].Journal of Engineering Mechanics,1990,116(1):91-106.
[6]蒋永生,陈忠菹,周绪平.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16.JIANG Yongsheng,CHEN Zhongfan,ZHOU Xuping.Aseismic research on RC frame joint of monolithically casted slab[J].Journal of BuildingStructures,1994,15(6):11-16.
[7]French C W,et al.Effect of floor slab on Behavior of slab-Beam-Column Connections[C]//ACI SP-123,Design of Beam-Column Joints forSeismic Resistance,1991.
[8]Suzuki N,et al.Behavior of reinforced concrete beam-column subassemblages with and without slab[R].Dept.of Arch.,Faculty of Engrg.,Univ.of Tokyo,Tokyo,Japan,1984.
[9]Kiureghian S.Hysteretic behavior of exterior R/C beam-column-slab subassembly[R].CE299 report,Dept.of Civ.Engrg.,Univ.of California,Berkeley,Calif,1983.
[2]王威,薛建阳,章红梅,等.框架结构在汶川5.12大地震中的震害分析及抗震启示[J].世界地震工程,2009,25(4):131-135.WANG Wei,XUE Jianyang,ZHANG Hongmei,et al.Seismic design and lessons learnt form the earthquake disaster of frame structures in 5.12Wenchuan earthquake[J].World Earthquake Engineering,1993,13(1):77-87.
[3]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 Jiuru.Seismic resistance of joints in reinforced concrete frame[M].Nanjing:Southeast University Press,1989.
[4]吴勇,雷汲川,杨红,等.板筋参与梁端负弯矩承载力问题的探讨[J].重庆大学建筑学报,2002,24(3):33-37.WUYong,LEI Jichuan,YANG Hong,et al.Discussion on negative flexural strength of beams including slabs[J].Journal of Chongqing University(Architecture Ed ion),2002,24(3):33-37.
[5]Pantazopoulou SJ,Moehle J P.Identification of effect of salbs on flexural behavior of beams[J].Journal of Engineering Mechanics,1990,116(1):91-106.
[6]蒋永生,陈忠菹,周绪平.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16.JIANG Yongsheng,CHEN Zhongfan,ZHOU Xuping.Aseismic research on RC frame joint of monolithically casted slab[J].Journal of BuildingStructures,1994,15(6):11-16.
[7]French C W,et al.Effect of floor slab on Behavior of slab-Beam-Column Connections[C]//ACI SP-123,Design of Beam-Column Joints forSeismic Resistance,1991.
[8]Suzuki N,et al.Behavior of reinforced concrete beam-column subassemblages with and without slab[R].Dept.of Arch.,Faculty of Engrg.,Univ.of Tokyo,Tokyo,Japan,1984.
[9]Kiureghian S.Hysteretic behavior of exterior R/C beam-column-slab subassembly[R].CE299 report,Dept.of Civ.Engrg.,Univ.of California,Berkeley,Calif,1983.
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