嵌入式波形钢板剪力键推出试验及数值分析
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摘要
为探究波形钢板剪力键的抗剪性能和破坏机理,设计了开孔和无孔2类波形钢板剪力键试件,进行推出试验研究。测试了试件的抗剪刚度、抗剪承载力、加载过程及破坏模态,随后采用有限元软件对试验全过程进行模拟,并开展波形钢板剪力键构造参数分析,探讨了混凝土强度、钢板厚度和高度的影响。根据试验和有限元分析结果,提出了波形钢板剪力键承载力计算公式。研究结果表明:波形钢板剪力键具有较高的抗剪承载力和良好的延性,当荷载-滑移曲线进入水平段后,仍能承受较大的相对变形,同时保持承载力不降低。无孔类剪力键依靠倾斜钢板材料的屈服来传递剪力,抗剪承载能力较高;开孔类剪力键主要通过倾斜钢板传递剪力,贯通钢筋和混凝土榫也能发挥一定的抗剪作用。剪力键开孔及设置贯通钢筋能增强混凝土板的整体性,开孔类剪力键试件的裂缝分布范围更大。试件破坏时,波形钢板剪力键发生明显变形,钢材达到极限强度,材料的利用效率高;波形钢板厚度、波形钢板高度和混凝土强度均是影响波形钢板剪力键抗剪承载力的关键因素,设计时需综合考虑并进行合理匹配,以便充分发挥各材料的性能;提出的波形钢板剪力键承载力计算公式与试验测试结果吻合较好。
This paper investigates the shear bearing properties and failure modes of shear connectors with corrugated steel plates by push out tests. The specimens of non-hole and hole-type shear connector with corrugated steel plate were designed, respectively. The stiffness, shear bearing capacity, loading process and failure mode were measured. Finite element models were introduced to check with push out test results and then used to perform a parametric study. The influences of concrete strength, thickness and height of steel plate were discussed. A formula for the bearing capacity of shear connector was proposed according to the experimental and finite element results. Results show that shear connectors with corrugated steel plates has great bearing capacity and ductility. When load reached the bearing capacity, the specimens could still perform a large deformation without decrease of load. The bearing capacity of non-hole shear connector completely depended on the inclined steel plates. For hole-type shear connector, the transverse bars made limited contribution to the bearing capacity. It mainly influenced by the inclined steel plates. The holes and transverse bars could increase the integrity of specimens. The specimens with hole-type shear connectors had larger distribution area of cracks. The material's ultimate strength of shear connector was reached after failure. Shear connectors performed great deformation and had high efficiency of steel utilization. The thickness, the height of corrugated steel plates and the concrete strength had great influences on the shear bearing capacities. These parameters should be matched rationally to exert their effects sufficiently. The formula proposed matched well with the test results.
This paper investigates the shear bearing properties and failure modes of shear connectors with corrugated steel plates by push out tests. The specimens of non-hole and hole-type shear connector with corrugated steel plate were designed, respectively. The stiffness, shear bearing capacity, loading process and failure mode were measured. Finite element models were introduced to check with push out test results and then used to perform a parametric study. The influences of concrete strength, thickness and height of steel plate were discussed. A formula for the bearing capacity of shear connector was proposed according to the experimental and finite element results. Results show that shear connectors with corrugated steel plates has great bearing capacity and ductility. When load reached the bearing capacity, the specimens could still perform a large deformation without decrease of load. The bearing capacity of non-hole shear connector completely depended on the inclined steel plates. For hole-type shear connector, the transverse bars made limited contribution to the bearing capacity. It mainly influenced by the inclined steel plates. The holes and transverse bars could increase the integrity of specimens. The specimens with hole-type shear connectors had larger distribution area of cracks. The material's ultimate strength of shear connector was reached after failure. Shear connectors performed great deformation and had high efficiency of steel utilization. The thickness, the height of corrugated steel plates and the concrete strength had great influences on the shear bearing capacities. These parameters should be matched rationally to exert their effects sufficiently. The formula proposed matched well with the test results.
引文
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[7] 周绪红,逯文茹,狄谨,等.钢锚箱栓钉剪力连接件群钉效应及抗剪承载力计算方法[J].中国公路学报,2014,27(12):33-45.ZHOU Xu-hong,LU Wen-ru,DI Jin,et al.Group Studs Effect and Shear Strength Calculation Method for Group Studs Shear Connector of Steel Anchor Box [J].China Journal of Highway and Transport,2014,27 (12):33-45.
[8] 张清华,李乔,卜一之.PBL剪力连接件群传力机理研究Ⅱ:极限承载力[J].土木工程学报,2011,44(5):101-108.ZHANG Qing-hua,LI Qiao,BU Yi-zhi.Load Transmission Mechanism of PBL Shear Connector Groups II:Load Capacity [J].China Civil Engineering Journal,2011,44 (5):101-108.
[9] VIANNA J D C,DE ANDRADE S A L,VELLASCO P C G D S,et al.Experimental Study of Perfobond Shear Connectors in Composite Construction [J].Journal of Constructional Steel Research,2013,81 (2013):62-75.
[10] VIANNA J D C,COSTA-NEVES L F,VELLASCO P C G D S,et al.Structural Behaviour of T-perfobond Shear Connectors in Composite Girders — An Experimental Approach [J].Engineering Structures,2008,30 (9):2381-2391.
[11] 杨飞,刘玉擎,姜智博,等.新型钢混螺栓连接件抗剪性能试验[J].中国公路学报,2018,31(12):50-58.YANG Fei,LIU Yu-qing,JIANG Zhi-bo,et al.Experiment on Shear Performance of Novel Steel-concrete Bolted Connector [J].China Journal of Highway and Transport,2018,31 (12):50-58.
[12] KIM S H,CHOI K T,PARK S J,et al.Experimental Shear Resistance Evaluation of Y-type Perfobond Rib Shear Connector [J].Journal of Constructional Steel Research,2013,82:1-18.
[13] 占玉林,李贵峰,赵人达,等.非金属剪力键界面黏结-滑移本构关系[J].中国公路学报,2016,29(11):116-121.ZHAN Yu-lin,LI Gui-feng,ZHAO Ren-da,et al.Constitutive Relationship Between Interfacial Bond and Slip of Metalloid Shear Connector [J].China Journal of Highway and Transport,2016,29 (11):116-121.
[14] ZHAN Y,MA Z J,ZHAO R,et al.Interface Behavior Between Steel and Concrete Connected by Bonding [J].Journal of Bridge Engineering,2016,21 (6):04016026.
[15] 贺君,刘玉擎,吕展,等.波形钢腹板内衬混凝土组合梁弯、剪性能试验[J].中国公路学报,2017,30(7):94-101.HE Jun,LIU Yu-qing,LYU Zhan,et al.Test on Flexural and Shearing Performance of Concrete-encased Composite Girder with Corrugated Steel Webs [J].China Journal of Highway and Transport,2017,30 (7):94-101.
[16] 宋随弟.大跨度波形钢腹板连续刚构桥受力特点及剪力键试验研究[D].成都:西南交通大学,2015.SONG Sui-di.Mechanical Characteristics of Long-span Continuous Rigid Frame Bridge with Corrugated Steel Webs and Experimental Study on Shear Connector [D].Chengdu:Southwest Jiaotong University,2015.
[17] 唐朋胜.波形钢腹板箱梁改进型剪力键的受力性能研究[D].重庆:重庆交通大学,2013.TANG Peng-sheng.The Mechanical Property Research of the Improved Shear Connector in Composite Box-girder with Corrugated Steel Webs [D].Chongqing:Chongqing Jiaotong University,2013.
[18] 胡旭辉,陈诗,唐朋胜,等.波形钢腹板改进型埋入式剪力键受力性能试验研究[J].桥梁建设,2018,48(4):45-50.HU Xu-hui,CHEN Shi,TANG Peng-sheng,et al.Experimental Study of Mechanical Properties of Improved Embedded Shear Connectors for Corrugated Steel Webs [J].Bridge Construction,2018,48 (4):45-50.
[19] 倪伟楠,刘朵,张建东,等.波形钢腹板嵌入式连接件力学性能试验研究[J].世界桥梁,2014,42(2):70-75.NI Wei-nan,LIU Duo,ZHANG Jian-dong,et al.Experimental Study of Mechanical Performance of Embedded Connectors in Corrugated Steel Webs [J].World Bridges,2014,42 (2):70-75.
[20] 张清华,李乔,唐亮.剪力连接件的三维非线性方针分析方法[J].西南交通大学学报,2005,40(5):595-599.ZHANG Qing-hua,LI Qiao,TANG Liang.Research on 3D FEM Nonlinear Simulation Method for Shear Connectors [J].Journal of Southwest Jiaotong University,2005,40 (5):595-599.
[21] 朱旭东.钢-混凝土组合结构桥梁中波形PBL连接件抗剪承载力研究[D].衡阳:南华大学,2018.ZHU Xu-dong.Research on Shearing Capacity of Corrugated PBL Shear Connectors in Steel-concrete Composite Bridges [D].Hengyang:University of South China,2018.
[2] 丁发兴,倪鸣,龚永智,等.栓钉剪力连接件滑移性能试验研究及受剪承载力计算[J].建筑结构学报,2014,35(9):98-106.DING Fa-xing,NI Ming,GONG Yong-zhi,et al.Experimental Study on Slip Behavior and Calculation of Shear Bearing Capacity for Shear Stud Connectors [J].Journal of Building Structures,2014,35 (9):98-106.
[3] 王宇航,聂建国.基于断裂力学的组合梁栓钉疲劳性能[J].清华大学学报:自然科学版,2009,49(9):1467-1470.WANG Yu-hang,NIE Jian-guo.Fatigue Behavior of Studs in a Composite Beam Based on Fracture Mechanics [J].Journal of Tsinghua University:Science and Technology,2009,49 (9):1467-1470.
[4] 荣学亮,黄侨,任远.栓钉连接件锈蚀后静力性能和抗疲劳性能的试验研究[J].土木工程学报,2013,46(2):10-18.RONG Xue-liang,HUANG Qiao,REN Yuan.Experimental Study on Static and Fatigue Behaviors of Stud Connectors for Composite Beams After Corrosion [J].China Civil Engineering Journal,2013,46 (2):10-18.
[5] 杨勇,陈阳,蔡军伟.开孔钢板剪力连接件静力性能试验[J].中国公路学报,2017,30(3):255-263.YANG Yong,CHEN Yang,CAI Jun-wei.Experiment on Static Behavior of Perfobond Shear Connectors [J].China Journal of Highway and Transport,2017,30 (3):255-263.
[6] AHN J H,LEE C G,WON J H,et al.Shear Resistance of the Perfobond-rib Shear Connector Depending on Concrete Strength and Rib Arrangement [J].Journal of Constructional Steel Research,2010,66 (10):1295-1307.
[7] 周绪红,逯文茹,狄谨,等.钢锚箱栓钉剪力连接件群钉效应及抗剪承载力计算方法[J].中国公路学报,2014,27(12):33-45.ZHOU Xu-hong,LU Wen-ru,DI Jin,et al.Group Studs Effect and Shear Strength Calculation Method for Group Studs Shear Connector of Steel Anchor Box [J].China Journal of Highway and Transport,2014,27 (12):33-45.
[8] 张清华,李乔,卜一之.PBL剪力连接件群传力机理研究Ⅱ:极限承载力[J].土木工程学报,2011,44(5):101-108.ZHANG Qing-hua,LI Qiao,BU Yi-zhi.Load Transmission Mechanism of PBL Shear Connector Groups II:Load Capacity [J].China Civil Engineering Journal,2011,44 (5):101-108.
[9] VIANNA J D C,DE ANDRADE S A L,VELLASCO P C G D S,et al.Experimental Study of Perfobond Shear Connectors in Composite Construction [J].Journal of Constructional Steel Research,2013,81 (2013):62-75.
[10] VIANNA J D C,COSTA-NEVES L F,VELLASCO P C G D S,et al.Structural Behaviour of T-perfobond Shear Connectors in Composite Girders — An Experimental Approach [J].Engineering Structures,2008,30 (9):2381-2391.
[11] 杨飞,刘玉擎,姜智博,等.新型钢混螺栓连接件抗剪性能试验[J].中国公路学报,2018,31(12):50-58.YANG Fei,LIU Yu-qing,JIANG Zhi-bo,et al.Experiment on Shear Performance of Novel Steel-concrete Bolted Connector [J].China Journal of Highway and Transport,2018,31 (12):50-58.
[12] KIM S H,CHOI K T,PARK S J,et al.Experimental Shear Resistance Evaluation of Y-type Perfobond Rib Shear Connector [J].Journal of Constructional Steel Research,2013,82:1-18.
[13] 占玉林,李贵峰,赵人达,等.非金属剪力键界面黏结-滑移本构关系[J].中国公路学报,2016,29(11):116-121.ZHAN Yu-lin,LI Gui-feng,ZHAO Ren-da,et al.Constitutive Relationship Between Interfacial Bond and Slip of Metalloid Shear Connector [J].China Journal of Highway and Transport,2016,29 (11):116-121.
[14] ZHAN Y,MA Z J,ZHAO R,et al.Interface Behavior Between Steel and Concrete Connected by Bonding [J].Journal of Bridge Engineering,2016,21 (6):04016026.
[15] 贺君,刘玉擎,吕展,等.波形钢腹板内衬混凝土组合梁弯、剪性能试验[J].中国公路学报,2017,30(7):94-101.HE Jun,LIU Yu-qing,LYU Zhan,et al.Test on Flexural and Shearing Performance of Concrete-encased Composite Girder with Corrugated Steel Webs [J].China Journal of Highway and Transport,2017,30 (7):94-101.
[16] 宋随弟.大跨度波形钢腹板连续刚构桥受力特点及剪力键试验研究[D].成都:西南交通大学,2015.SONG Sui-di.Mechanical Characteristics of Long-span Continuous Rigid Frame Bridge with Corrugated Steel Webs and Experimental Study on Shear Connector [D].Chengdu:Southwest Jiaotong University,2015.
[17] 唐朋胜.波形钢腹板箱梁改进型剪力键的受力性能研究[D].重庆:重庆交通大学,2013.TANG Peng-sheng.The Mechanical Property Research of the Improved Shear Connector in Composite Box-girder with Corrugated Steel Webs [D].Chongqing:Chongqing Jiaotong University,2013.
[18] 胡旭辉,陈诗,唐朋胜,等.波形钢腹板改进型埋入式剪力键受力性能试验研究[J].桥梁建设,2018,48(4):45-50.HU Xu-hui,CHEN Shi,TANG Peng-sheng,et al.Experimental Study of Mechanical Properties of Improved Embedded Shear Connectors for Corrugated Steel Webs [J].Bridge Construction,2018,48 (4):45-50.
[19] 倪伟楠,刘朵,张建东,等.波形钢腹板嵌入式连接件力学性能试验研究[J].世界桥梁,2014,42(2):70-75.NI Wei-nan,LIU Duo,ZHANG Jian-dong,et al.Experimental Study of Mechanical Performance of Embedded Connectors in Corrugated Steel Webs [J].World Bridges,2014,42 (2):70-75.
[20] 张清华,李乔,唐亮.剪力连接件的三维非线性方针分析方法[J].西南交通大学学报,2005,40(5):595-599.ZHANG Qing-hua,LI Qiao,TANG Liang.Research on 3D FEM Nonlinear Simulation Method for Shear Connectors [J].Journal of Southwest Jiaotong University,2005,40 (5):595-599.
[21] 朱旭东.钢-混凝土组合结构桥梁中波形PBL连接件抗剪承载力研究[D].衡阳:南华大学,2018.ZHU Xu-dong.Research on Shearing Capacity of Corrugated PBL Shear Connectors in Steel-concrete Composite Bridges [D].Hengyang:University of South China,2018.