型钢与钢纤维混凝土界面黏结性能及损伤耗能试验研究
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摘要
为解决型钢混凝土结构中型钢与钢筋相互干扰、混凝土浇筑困难等施工难题,将构件中钢筋笼替换成钢纤维,形成型钢-钢纤维混凝土组合结构。型钢与钢纤维混凝土间的黏结性能是保证两种材料共同工作的基础,通过8个圆形截面试件与8个方形截面试件的标准推出试验,研究在不设置钢筋笼的情况下型钢与钢纤维混凝土之间的黏结性能,获得了荷载-滑移曲线、黏结强度、界面耗能等重要性能指标。结果表明:加载端与自由端的荷载-滑移曲线存在较为明显的差异,并且当荷载达到峰值承载力时,曲线的差异性表现的最为明显。圆形试件总体表现出较方形试件更好的界面黏结效果,其名义黏结强度最大可达到1.913MPa,残余黏结强度最大为0.707MPa,而方形试件相应的指标最大值分别为1.496MPa和0.609MPa。混凝土保护层厚度与黏结长度越大,受力过程中界面能够储存的黏弹性变形能越大。
An innovative method is proposed to replace the steel reinforcement cage by steel fiber to form a shape steel and steel fiber reinforced concrete to solve the construction problems of steel reinforced concrete structure,such as position conflict between shape steel and steel bars, or difficulty of concrete placement. The bond behavior between the shape steel and steel fiber reinforced concrete is the foundation to ensure the cooperation of two materials. 8 circular specimens and 8 square specimens were designed and experimented by push-out testing to investigate the bonding properties between shape steel and steel fiber reinforced concrete without steel reinforcement cage. Some important performance indexes, including load-slip curve, bond strength and interfacial energy were obtained. The load-slip curves of the loading end and the free end show obvious differences, which are most obvious when the load reaches the peak load-bearing capacity. In addition, circular specimens show better interfacial bonding effect than the square specimens. The maximum nominal bonding strength of the circular specimen reaches 1.913 MPa and the maximum residual bond strength is 0.707 MPa, while the corresponding values for the square specimen are 1.496 MPa and 0.609 MPa respectively. The larger the thickness of concrete protective layer and bond length, the more viscoelastic deformation energy can be stored at the interface during the stress process.
An innovative method is proposed to replace the steel reinforcement cage by steel fiber to form a shape steel and steel fiber reinforced concrete to solve the construction problems of steel reinforced concrete structure,such as position conflict between shape steel and steel bars, or difficulty of concrete placement. The bond behavior between the shape steel and steel fiber reinforced concrete is the foundation to ensure the cooperation of two materials. 8 circular specimens and 8 square specimens were designed and experimented by push-out testing to investigate the bonding properties between shape steel and steel fiber reinforced concrete without steel reinforcement cage. Some important performance indexes, including load-slip curve, bond strength and interfacial energy were obtained. The load-slip curves of the loading end and the free end show obvious differences, which are most obvious when the load reaches the peak load-bearing capacity. In addition, circular specimens show better interfacial bonding effect than the square specimens. The maximum nominal bonding strength of the circular specimen reaches 1.913 MPa and the maximum residual bond strength is 0.707 MPa, while the corresponding values for the square specimen are 1.496 MPa and 0.609 MPa respectively. The larger the thickness of concrete protective layer and bond length, the more viscoelastic deformation energy can be stored at the interface during the stress process.
引文
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[16]郑华海,陈宗平,苏益声.带栓钉型钢混凝土组合构件受力性能及承载力计算方法研究[J].工业建筑,2016,46(11):97-104(Zheng Huahai,Chen Zongping,Su Yisheng.Research on mechanical behavior and bearing capacity calculation method of steel reinforced recycle aggregate concrete combined component with stud connecters[J].Industrial Construction,2016,46(11):97-104(in Chinese))
[17]Zheng Huahai,Chen Zongping,Xu Jinjun.Bond behavior of H-shaped steel embedded in recycled aggregate concrete under push-out loads[J].International Journal of Steel Structures,2016,16(2):347-360
[18]Chen Zongping,Liang Ying,Chen Yuliang.Research on bonding strength of steel and concrete with different bonding interfaces[J].Applied Mechanics and Materials,2014,470:838-841
[19]Tao Zhong,Yu Qing.Residual bond strength in steel reinforced concrete columns after fire exposure[J].Fire Safety Journal,2012,53:19-27
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[21]陈宗平,周文祥,徐金俊.高温后型钢高强混凝土界面黏结滑移性能试验研究[J].建筑结构学报,2015,36(12):106-115(Chen Zongping,Zhou Wenxiang,Xu Jinjun.Experimental study on bond-slip behavior of steel reinforced high strength concrete after high temperature[J].Journal of Building Structures,2015,36(12):106-115(in Chinese))
[22]陈宗平,陈宇良,郑华海,等.型钢-再生混凝土界面黏结强度及其影响因素分析[J].工业建筑,2013,43(9):1-6(Chen Zongping,Chen Yuliang,Zheng Huahai,et al.Analysis of influence factors and bond strength of steel-recycled aggregate concrete interface[J].Industrial Construction,2013,43(9):1-6(in Chinese))
[23]应武挡,陈宗平.型钢高强混凝土界面黏结传力机理及影响因素分析[J].土木工程学报,2016,49(9):53-63,71(Ying Wudang,Chen Zongping.Interface bond force transfer mechanisms and its influence analysis between shape steel and high-strength concrete[J].China Civil Engineering Journal,2016,49(9):53-63,71(in Chinese))
[24]李俊华,王国锋,邱栋梁,等.带栓钉连接件型钢混凝土剪力传递性能研究[J].土木工程学报,2012,45(12):74-82(Li Junhua,Wang Guofeng,Qiu Dongliang,et al.Study on the force transfer behavior of SRC members with stud shear connectors[J].China Civil Engineering Journal,2012,45(12):74-82(in Chinese))
[25]杨勇.型钢混凝土粘结滑移基本理论及应用研究[D].西安:西安建筑科技大学,2003
[26]王博,白国良,代慧娟,等.再生混凝土与钢筋粘结滑移性能的试验研究及力学分析[J].工程力学,2013,30(10):54-64(Wang Bo,Bai Guoliang,Dai Huijuan,et al.Experimental and mechanical analysis of bond-slip performance between recycled concrete and rebar[J].Engineering Mechanics,2013,30(10):54-64(in Chinese))
[27]徐金俊,陈宗平,薛建阳,等.圆钢管再生混凝土界面黏结失效的推出试验研究[J].建筑结构学报,2013,34(7):148-157(Xu Jinjun,Chen Zongping,Xue Jianyang,et al.Failure mechanism of interface bond behavior between circular steel tube and recycled aggregate concrete by push-out test[J].Journal of Building Structures,2013,34(7):148-157(in Chinese))
[2]汪大绥,周建龙.我国高层建筑钢-混凝土混合结构发展与展望[J].建筑结构学报,2010,31(6):62-70(Wang Dasui,Zhou Jianlong.Development and prospect of hybrid high-rise building structures in China[J].Journal of Building Structures,2010,31(6):62-70(in Chinese))
[3]金星,岳翠兰,葛海东.型钢混凝土柱与框架梁钢筋复杂节点施工技术[J].建筑技术,2008,39(9):667-670(Jin Xing,Yue Cuilan,Ge Haidong.Construction technology for the reinforcement of complicated joints between profile steel concrete column and frame beam[J].Architecture Technology,2008,39(9):667-670(in Chinese))
[4]Paultre P,Eid R,Langlois Y,et al.Behavior of steel fiber-reinforced high-strength concrete columns under uniaxial compression[J].Journal of Structural Engineering,2010,136(10):1225-1235
[5]高丹盈,陈刚,Sadraddin H M N,等.钢筋与钢纤维混凝土的黏结-滑移性能及其关系模型[J].建筑结构学报,2015,36(7):132-139(Gao Danying,Chen Gang,Sadraddin H M N,et al.Bond-slip behavior and constitutive model between rebar and steel fibre reinforced concrete[J].Journal of Building Structures,2015,36(7):132-139(in Chinese))
[6]Bryson J,Mathey R G.Surface condition effect on bond strength of steel beams embedded in concrete[J].Journal of ACI,1962,59(3):397-406
[7]Hawkins N M.Strength of concrete encased steel beams[J].Institution of Engineers Civil Engineering Transaction,1973,CE15(1):39-46
[8]陈宗平,徐金俊,薛建阳,等.钢管再生混凝土黏结滑移推出试验及黏结强度计算[J].土木工程学报,2013,46(3):49-58(Chen Zongping,Xu Jinjun,Xue Jianyang,et al.Push-out test on the interface bond-slip behavior and calculation on bond strength between steel tube and recycled aggregate concrete in RACFSTstructures[J].China Civil Engineering Journal,2013,46(3):49-58(in Chinese))
[9]李现辉,李国强.腹板嵌入式组合梁中抗剪连接件推出试验[J].建筑结构学报,2009,30(4):78-84(Li Xianhui,Li Guoqiang.Push-out experimental study on shear connectors in embedded composite beams with notched web[J].Journal of Building Structures,2009,30(4):78-84(in Chinese))
[10]薛建阳,吴占景,隋?,等.仿古建筑钢结构双梁-柱边节点抗震性能试验研究[J].建筑结构学报,2015,36(3):80-89(Xue Jianyang,Wu Zhanjing,Sui Yan,et al.Experimental study on seismic performance of steel double-beams column exterior joints in antique style building[J].Journal of Building Structures,2015,36(3):80-89(in Chinese))
[11]米文杰.仿古建筑结构设计分析[J].建筑结构,2013,43(23):62-66(Mi Wenjie.Structural design and analysis of the imitation antique architecture[J].Building Structure,2013,43(23):62-66(in Chinese))
[12]GB/T 706-2008热轧型钢[S].北京:中国标准出版社,2009(GB/T 706-2008 Hot rolled section steel[S].Beijing:Standards Press of China,2009(in Chinese))
[13]杨勇,郭子雄,薛建阳,等.型钢混凝土粘结滑移性能试验研究[J].建筑结构学报,2005,26(4):1-9(Yang Yong,Guo Zixiong,Xue Jianyang,et al.Experiment study on bond slip behavior between section steel and concrete in SRC structures[J].Journal of Building Structures,2005,26(4):1-9(in Chinese))
[14]Roeder C W,Chmielowski R.Shear connector requirements for embedded steel sections[J].Journal of Structural Engineering,ASCE,1999,125(2):142-152
[15]李俊华,邱栋梁,俞凯,等.高温后型钢混凝土粘结滑移性能研究[J].工程力学,2015,32(2):190-200,206(Li Junhua,Qiu Dongliang,Yu Kai,et al.Study on bond-slip behavior between shaped steel and concrete in SRC structures after exposed to high temperature[J].Engineering Mechanics,2015,32(2):190-200,206(in Chinese))
[16]郑华海,陈宗平,苏益声.带栓钉型钢混凝土组合构件受力性能及承载力计算方法研究[J].工业建筑,2016,46(11):97-104(Zheng Huahai,Chen Zongping,Su Yisheng.Research on mechanical behavior and bearing capacity calculation method of steel reinforced recycle aggregate concrete combined component with stud connecters[J].Industrial Construction,2016,46(11):97-104(in Chinese))
[17]Zheng Huahai,Chen Zongping,Xu Jinjun.Bond behavior of H-shaped steel embedded in recycled aggregate concrete under push-out loads[J].International Journal of Steel Structures,2016,16(2):347-360
[18]Chen Zongping,Liang Ying,Chen Yuliang.Research on bonding strength of steel and concrete with different bonding interfaces[J].Applied Mechanics and Materials,2014,470:838-841
[19]Tao Zhong,Yu Qing.Residual bond strength in steel reinforced concrete columns after fire exposure[J].Fire Safety Journal,2012,53:19-27
[20]Wang Weihua,Han Linhai,Tan Qinghua,et al.Tests on the steel-concrete bond strength in steel reinforced concrete(SRC)columns after fire exposure[J].Fire Technology,2017,53(2):917-945
[21]陈宗平,周文祥,徐金俊.高温后型钢高强混凝土界面黏结滑移性能试验研究[J].建筑结构学报,2015,36(12):106-115(Chen Zongping,Zhou Wenxiang,Xu Jinjun.Experimental study on bond-slip behavior of steel reinforced high strength concrete after high temperature[J].Journal of Building Structures,2015,36(12):106-115(in Chinese))
[22]陈宗平,陈宇良,郑华海,等.型钢-再生混凝土界面黏结强度及其影响因素分析[J].工业建筑,2013,43(9):1-6(Chen Zongping,Chen Yuliang,Zheng Huahai,et al.Analysis of influence factors and bond strength of steel-recycled aggregate concrete interface[J].Industrial Construction,2013,43(9):1-6(in Chinese))
[23]应武挡,陈宗平.型钢高强混凝土界面黏结传力机理及影响因素分析[J].土木工程学报,2016,49(9):53-63,71(Ying Wudang,Chen Zongping.Interface bond force transfer mechanisms and its influence analysis between shape steel and high-strength concrete[J].China Civil Engineering Journal,2016,49(9):53-63,71(in Chinese))
[24]李俊华,王国锋,邱栋梁,等.带栓钉连接件型钢混凝土剪力传递性能研究[J].土木工程学报,2012,45(12):74-82(Li Junhua,Wang Guofeng,Qiu Dongliang,et al.Study on the force transfer behavior of SRC members with stud shear connectors[J].China Civil Engineering Journal,2012,45(12):74-82(in Chinese))
[25]杨勇.型钢混凝土粘结滑移基本理论及应用研究[D].西安:西安建筑科技大学,2003
[26]王博,白国良,代慧娟,等.再生混凝土与钢筋粘结滑移性能的试验研究及力学分析[J].工程力学,2013,30(10):54-64(Wang Bo,Bai Guoliang,Dai Huijuan,et al.Experimental and mechanical analysis of bond-slip performance between recycled concrete and rebar[J].Engineering Mechanics,2013,30(10):54-64(in Chinese))
[27]徐金俊,陈宗平,薛建阳,等.圆钢管再生混凝土界面黏结失效的推出试验研究[J].建筑结构学报,2013,34(7):148-157(Xu Jinjun,Chen Zongping,Xue Jianyang,et al.Failure mechanism of interface bond behavior between circular steel tube and recycled aggregate concrete by push-out test[J].Journal of Building Structures,2013,34(7):148-157(in Chinese))
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