现浇钢筋混凝土空心楼盖板柱节点抗冲切性能试验研究
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摘要
为研究现浇钢筋混凝土空心楼盖抗冲切性能,明确板柱节点实心区及暗梁配置箍筋对冲切承载力和节点破坏模式的影响,在竖向荷载作用下完成了1个仅有板柱节点实心区和2个仅配置暗梁箍筋的现浇混凝土空心楼盖内板柱节点的静力试验。结果表明:空心楼盖板柱节点与传统无梁楼盖板柱节点具有相似的冲切破坏形态;设置节点实心区或在暗梁中配置箍筋均可改善抗冲切性能;配置暗梁箍筋比设置节点实心区在提高抗冲切能力方面效果更好;通过控制暗梁配置箍筋数量可以有效地改变板柱节点的破坏类型,使其由脆性冲切破坏转变为延性弯曲破坏。根据试验结果提出了空心楼盖板柱节点的抗冲切设计建议。
In order to study the punching shear behavior of cast-in-situ reinforced concrete hollow floor, the effects of solid zone of slab-column joints and stirrups of concealed beams on punching shear behavior and failure mode of joints were clarified. Static tests of one solid zone of slab-column joints and two joint of cast-in-situ concrete hollow floor with only concealed beam stirrups were carried out under vertical loads. The results show that the hollow floor slab-column joints have similar failure modes to the traditional beamless floor slab column joints; the punching shear behavior can be improved by setting solid joint area or stirrups in concealed beam; the stirrups with concealed beam is better than that with solid joint to improve the punching shear resistance; by controlling the number of stirrups in concealed beams, the failure types of slab-column joints can be changed from brittle punching failure to ductile bending failure. According to the test results, the suggestion of punching shear design for hollow floor slab-column joints was put forward.
In order to study the punching shear behavior of cast-in-situ reinforced concrete hollow floor, the effects of solid zone of slab-column joints and stirrups of concealed beams on punching shear behavior and failure mode of joints were clarified. Static tests of one solid zone of slab-column joints and two joint of cast-in-situ concrete hollow floor with only concealed beam stirrups were carried out under vertical loads. The results show that the hollow floor slab-column joints have similar failure modes to the traditional beamless floor slab column joints; the punching shear behavior can be improved by setting solid joint area or stirrups in concealed beam; the stirrups with concealed beam is better than that with solid joint to improve the punching shear resistance; by controlling the number of stirrups in concealed beams, the failure types of slab-column joints can be changed from brittle punching failure to ductile bending failure. According to the test results, the suggestion of punching shear design for hollow floor slab-column joints was put forward.
引文
[1] 国家工程建设标准化信息网[EB/OL].http://www.risn.org.cn.
[2] 现浇混凝土空心楼盖技术规程:JGJ/T 268—2012[S].北京:中国建筑工业出版社,2012.
[3] LAN C,LEE S H,CHO S H,et al.Investigations on flexural strength and stiffness of hollow slabs[J].Advances in Structural Engineering,2010,13(4):591-602.
[4] 胡萍,杨伟军,张振浩,等.蜂巢芯空心楼盖足尺试验研究及有限元分析[J].建筑结构,2012,42(1):85-90.
[5] 吴方伯,李钧,周绪红,等.后装式双向密肋空心楼盖静力性能试验研究与挠度计算方法[J].建筑结构学报,2014,35(12):1-9.
[6] 龚启宏,朱强,梁书亭,等.空心板柱结构中柱节点受冲切承载力试验研究[J].东南大学学报(自然科学版),2013,43(2):420-424.
[7] 王维雪.现浇混凝土空心楼盖板柱节点受力性能分析[D].石家庄:石家庄铁道大学,2016.
[8] 庞瑞,党隆基,倪红梅,等.空心楼盖板柱增强节点抗冲切性能数值分析[J].工业建筑,2017,47(2):76-81.
[9] VALIVONIS J,SKUTURNA T,DAUGEVIIUS M,et al.Punching shear strength of reinforced concrete slabs with plastic void formers[J].Construction & Building Materials,2017,145(16):518-527.
[10] VALIVONIS J,?NEIDERIS A,?ALNA R,et al.Punching strength of biaxial voided slabs[J].ACI Structural Journal,2017,114(6):1373-1383.
[11] CORONELLI D,FOTI F,MARTINELLI L,et al.Shear and punching strength of reinforced concrete voided slabs[J].ACI Structural Journal,2017,SP(321-3):1-14.
[12] MUTTONI A.Punching shear strength of reinforced concrete slabs without transverse reinforcement[J].ACI Structural Journal,2009,105(4):440-450.
[13] 混凝土结构试验方法标准:GB/T 50152—2012 [S].北京:中国建筑工业出版社,2012.
[14] 普通混凝土力学性能试验方法标准:GB/T 50081—2002 [S].北京:中国建筑工业出版社,2002.
[15] 金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1—2010 [S].北京:中国建筑工业出版社,2010.
[16] TIMOSHENKO S AND WOINOWSKY-KRIEGER S.Theory of plates and shells [M].New York:McGraw-hill,1959.
[17] 混凝土结构设计规范:GB 50010—2010 [S].北京:中国建筑工业出版社,2011.
[18] HUANG CHUANTENG,PU SHUANG,DING BINBIN.An analytical punching shear model of RC slab-column connection based on database[J].Journal of Intelligent & Fuzzy Systems,2018,35(1):469-483.
[2] 现浇混凝土空心楼盖技术规程:JGJ/T 268—2012[S].北京:中国建筑工业出版社,2012.
[3] LAN C,LEE S H,CHO S H,et al.Investigations on flexural strength and stiffness of hollow slabs[J].Advances in Structural Engineering,2010,13(4):591-602.
[4] 胡萍,杨伟军,张振浩,等.蜂巢芯空心楼盖足尺试验研究及有限元分析[J].建筑结构,2012,42(1):85-90.
[5] 吴方伯,李钧,周绪红,等.后装式双向密肋空心楼盖静力性能试验研究与挠度计算方法[J].建筑结构学报,2014,35(12):1-9.
[6] 龚启宏,朱强,梁书亭,等.空心板柱结构中柱节点受冲切承载力试验研究[J].东南大学学报(自然科学版),2013,43(2):420-424.
[7] 王维雪.现浇混凝土空心楼盖板柱节点受力性能分析[D].石家庄:石家庄铁道大学,2016.
[8] 庞瑞,党隆基,倪红梅,等.空心楼盖板柱增强节点抗冲切性能数值分析[J].工业建筑,2017,47(2):76-81.
[9] VALIVONIS J,SKUTURNA T,DAUGEVIIUS M,et al.Punching shear strength of reinforced concrete slabs with plastic void formers[J].Construction & Building Materials,2017,145(16):518-527.
[10] VALIVONIS J,?NEIDERIS A,?ALNA R,et al.Punching strength of biaxial voided slabs[J].ACI Structural Journal,2017,114(6):1373-1383.
[11] CORONELLI D,FOTI F,MARTINELLI L,et al.Shear and punching strength of reinforced concrete voided slabs[J].ACI Structural Journal,2017,SP(321-3):1-14.
[12] MUTTONI A.Punching shear strength of reinforced concrete slabs without transverse reinforcement[J].ACI Structural Journal,2009,105(4):440-450.
[13] 混凝土结构试验方法标准:GB/T 50152—2012 [S].北京:中国建筑工业出版社,2012.
[14] 普通混凝土力学性能试验方法标准:GB/T 50081—2002 [S].北京:中国建筑工业出版社,2002.
[15] 金属材料拉伸试验第1部分:室温试验方法:GB/T 228.1—2010 [S].北京:中国建筑工业出版社,2010.
[16] TIMOSHENKO S AND WOINOWSKY-KRIEGER S.Theory of plates and shells [M].New York:McGraw-hill,1959.
[17] 混凝土结构设计规范:GB 50010—2010 [S].北京:中国建筑工业出版社,2011.
[18] HUANG CHUANTENG,PU SHUANG,DING BINBIN.An analytical punching shear model of RC slab-column connection based on database[J].Journal of Intelligent & Fuzzy Systems,2018,35(1):469-483.