配置钢筋桁架的钢筋混凝土叠合墙体界面受剪性能试验研究
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摘要
为研究配置钢筋桁架的叠合墙体的界面受剪性能,以界面凿毛程度、界面桁架数量和桁架腹筋直径(界面受剪配筋率)等为参数,开展了7个钢筋混凝土叠合墙体的界面受剪试验,分析了叠合墙体界面的破坏现象和破坏形态、剪力-界面滑移关系、受剪承载力等。研究结果表明:叠合界面双面沿垂直于受力方向做5道深分别为5 mm和10 mm的凿毛,可分别提高叠合界面的受剪承载力26%和32%;叠合界面的界面受剪配筋率由0增加至0.241%,其受剪承载力、峰值滑移与开裂滑移的比值可分别提高57%和930%;基于文中提出的叠合界面剪力-滑移模型推导的计算式,其计算值与试验值吻合较好,可为叠合墙体界面的受剪承载力设计提供参考。
To study the shear behavior of the interface of composite reinforced concrete walls with reinforcement truss,shear test on seven specimens with different parameters,including the roughness of interface,the quantity and diameter of the reinforcement truss,i.e.,the reinforcement ratio for shear interface,were carried out.The failure phenomenon and mode,the shear force-interfacial slip relationship and the shear strength of the interface of composite reinforced concrete walls were analyzed.The results show that the shear capacity of the interface of composite reinforced concrete walls can be increased by making five gouges in the direction perpendicular to the shear force on both sides of the interface.When the depth of the gouges is 5 mm and 10 mm,the shear capacity can be increase by26% and 32% respectively.It is also found that the shear capacity and the ratio of peak slip to crack slip of the composite interface can be increased by 57% and 930%,respectively,by increasing the shear reinforcement ration from 0 to 0.241%.According to the shear force-slip model of the composite interface,a calculation formula was derived.The calculated value is in good agreement with the experimental value.The proposed formula thus provides a theoretical basis for the design of shear capacity of composite interface of composite reinforced concrete walls.
To study the shear behavior of the interface of composite reinforced concrete walls with reinforcement truss,shear test on seven specimens with different parameters,including the roughness of interface,the quantity and diameter of the reinforcement truss,i.e.,the reinforcement ratio for shear interface,were carried out.The failure phenomenon and mode,the shear force-interfacial slip relationship and the shear strength of the interface of composite reinforced concrete walls were analyzed.The results show that the shear capacity of the interface of composite reinforced concrete walls can be increased by making five gouges in the direction perpendicular to the shear force on both sides of the interface.When the depth of the gouges is 5 mm and 10 mm,the shear capacity can be increase by26% and 32% respectively.It is also found that the shear capacity and the ratio of peak slip to crack slip of the composite interface can be increased by 57% and 930%,respectively,by increasing the shear reinforcement ration from 0 to 0.241%.According to the shear force-slip model of the composite interface,a calculation formula was derived.The calculated value is in good agreement with the experimental value.The proposed formula thus provides a theoretical basis for the design of shear capacity of composite interface of composite reinforced concrete walls.
引文
[1]魏奇科,王宇航,王永超,皮正波.叠合装配式地下综合管廊节点抗震性能试验研究[J].建筑结构学报,2019,40(2):246-254.(WEI Qike,WANG Yuhang,WANG Yongchao,PI Zhengbo.Experimental study on seismic performance of joints in prefabricated sandwich structures of utility tunnels[J].Journal of Building Structures,2019,40(2):246-254.(in Chinese))
[2]CLIMACO J C T S,REGAN P E.Evaluation of bond strength between old and new concrete in structural repairs[J].Magazine of Concrete Research,2001,53(6):377-390
[3]聂建国,王宇航,樊健生,张晓光.钢-混凝土组合梁加宽混凝土旧桥技术中组合横梁界面受力性能研究[J].土木工程学报,2012,45(3):99-109.(NIEJianguo,WANG Yuhang,FAN Jiansheng,ZHANGXiaoguang.Mechanical behavior of the interface of composite cross beam in old concrete bridges widened with steel-concrete composite beam[J].China Civil Engineering Journal,2012,45(3):99-109.(in Chinese))
[4]SOHEL K M A,LIEW J Y Richard,YAN J B,ZHANGM.H,CHIA K S.Behavior of steel-concrete-steel sandwich structures with lightweight cement composite and novel shear connectors[J].Composite Structures,2012,94(12):3500-3509.
[5]魏欣.新梁旧板叠合构件受剪性能研究[D].扬州:扬州大学,2016:1-5.(WEI Xin.Research on the shear behaviors of new-beam and old-slab composite component[D].Yangzhou:Yangzhou University,2016:1-5.(in Chinese))
[6]王滋军,刘伟庆,魏威,等.钢筋混凝土水平拼接叠合剪力墙抗震性能试验研究[J].建筑结构学报,2012,33(7):147-155.(WANG Zijun,LIU Weiqing,WEIWei,et al.Experimental study on seismic behavior of reinforced concrete composite shear wall with level splice[J].Journal of Building Structures,2012,33(7):147-155.(in Chinese))
[7]杨联萍,余少乐,张其林,崔家春.双面RTRCW试件界面受剪性能试验[J].同济大学学报,2017,45(5):664-672.(YANG Lianping,YU Shaole,ZHANGQilin,CUI Jiachun.Experimental study on shearing performance of adhesive interface of doublesuperimposed specimens[J]Journal of Tongji University(Natural Science),2017,45(5):664-672.(in Chinese))
[8]British Standards Institution.Eurocode 2:design of concrete structures:part 1:general rules and rules for buildings:DD ENV 1992-1-1[S].London:British Standards Institution,1992.
[2]CLIMACO J C T S,REGAN P E.Evaluation of bond strength between old and new concrete in structural repairs[J].Magazine of Concrete Research,2001,53(6):377-390
[3]聂建国,王宇航,樊健生,张晓光.钢-混凝土组合梁加宽混凝土旧桥技术中组合横梁界面受力性能研究[J].土木工程学报,2012,45(3):99-109.(NIEJianguo,WANG Yuhang,FAN Jiansheng,ZHANGXiaoguang.Mechanical behavior of the interface of composite cross beam in old concrete bridges widened with steel-concrete composite beam[J].China Civil Engineering Journal,2012,45(3):99-109.(in Chinese))
[4]SOHEL K M A,LIEW J Y Richard,YAN J B,ZHANGM.H,CHIA K S.Behavior of steel-concrete-steel sandwich structures with lightweight cement composite and novel shear connectors[J].Composite Structures,2012,94(12):3500-3509.
[5]魏欣.新梁旧板叠合构件受剪性能研究[D].扬州:扬州大学,2016:1-5.(WEI Xin.Research on the shear behaviors of new-beam and old-slab composite component[D].Yangzhou:Yangzhou University,2016:1-5.(in Chinese))
[6]王滋军,刘伟庆,魏威,等.钢筋混凝土水平拼接叠合剪力墙抗震性能试验研究[J].建筑结构学报,2012,33(7):147-155.(WANG Zijun,LIU Weiqing,WEIWei,et al.Experimental study on seismic behavior of reinforced concrete composite shear wall with level splice[J].Journal of Building Structures,2012,33(7):147-155.(in Chinese))
[7]杨联萍,余少乐,张其林,崔家春.双面RTRCW试件界面受剪性能试验[J].同济大学学报,2017,45(5):664-672.(YANG Lianping,YU Shaole,ZHANGQilin,CUI Jiachun.Experimental study on shearing performance of adhesive interface of doublesuperimposed specimens[J]Journal of Tongji University(Natural Science),2017,45(5):664-672.(in Chinese))
[8]British Standards Institution.Eurocode 2:design of concrete structures:part 1:general rules and rules for buildings:DD ENV 1992-1-1[S].London:British Standards Institution,1992.
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