集束式长短剪力钉抗剪性能参数影响研究
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摘要
为了明确剪力钉直径和间距变化对集束式长短剪力钉抗剪性能的影响,通过10组共计34个推出试验,分析了集束式长短剪力钉试件与标准推出试件之间抗剪承载力、抗剪刚度和破坏形态的变化规律,获得了集束式长短剪力钉的荷载-滑移关系,提出了考虑剪力钉顶杆直径和间距变化的集束式长短剪力钉的抗剪承载力计算公式,明确了集束式剪力钉布置下群钉的折减系数.试验结果表明:抗剪承载力和抗剪刚度随着剪力钉直径和纵向间距的增大而增大;群钉的抗剪承载力折减系数为0.71.
A new type of cluster long and short shear nails was arranged in steel-concrete composite bridges.In order to clarify the influence of shear diameter and spacing on its shear behavior,ten groups of a total of 34 push-out tests were carried out.Based on the test results,the failure model,shear strength and shear stiffness of the group shear connectors with different length and diameter specimen were compared with the standard specimen.In addition,the load-slip relationship of the group stud connectors with different length and diameter considering diameter and spacing variation was proposed,a shear strength calculation formula was given,and the reduction factor of the ultimate bearing capacity per stud was acquired.Test results show that the shear-bearing capacity and stiffness increases with the increase of stud diameter and longitudinal spacing,and the reduction coefficient of group shear connectors is 0.71.
A new type of cluster long and short shear nails was arranged in steel-concrete composite bridges.In order to clarify the influence of shear diameter and spacing on its shear behavior,ten groups of a total of 34 push-out tests were carried out.Based on the test results,the failure model,shear strength and shear stiffness of the group shear connectors with different length and diameter specimen were compared with the standard specimen.In addition,the load-slip relationship of the group stud connectors with different length and diameter considering diameter and spacing variation was proposed,a shear strength calculation formula was given,and the reduction factor of the ultimate bearing capacity per stud was acquired.Test results show that the shear-bearing capacity and stiffness increases with the increase of stud diameter and longitudinal spacing,and the reduction coefficient of group shear connectors is 0.71.
引文
[1]苏庆田,韩旭,任飞.多排焊钉推出试验试件力学性能[J].同济大学学报(自然科学版),2014,42(7):1011-1016.
[2]SHIM C S,LEE P G,YOON T Y.Static behavior of large stud shear connectors[J].Engineering Structures,2004,26(12):1853-1860.
[3]郑舟军,陈开利,童智洋.剪力钉推出试验受力机理研究[J].钢结构,2009,24(9):28-32.
[4]黄彩萍,张仲先,郑舟军,等.钢混组合结构中剪力钉群的力学性能及破坏机理试验研究[J].武汉理工大学学报,2015,37(2):100-105.
[5]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.
[6]OKADA J,YODA T,LEBET J P.A study of the Grouped arrangement of stud connectors on the shear strength behavior[J].Journal of Structural Mechanics&Earthquake Engineering,2006,23(1):75-89.
[7]姬同庚.栓钉连接件剪切刚度试验研究[J].世界桥梁,2013,41(6):62-66.
[8]蔺钊飞,刘玉擎,贺君.焊钉连接件抗剪刚度计算方法研究[J].工程力学,2014,31(7):85-90.
[9]OLLGARD J G.Shear strength of stud connectors in lightweight and normal weight concrete[J].AISC Eng'g Jr,1971,71(10):53-64.
[10]XUE D,LIU Y,YU Z,et al.Static behavior of multi-stud shear connectors for steel-concrete composite bridge[J].Journal of Constructional Steel Research,2012,74(8):1-7.
[2]SHIM C S,LEE P G,YOON T Y.Static behavior of large stud shear connectors[J].Engineering Structures,2004,26(12):1853-1860.
[3]郑舟军,陈开利,童智洋.剪力钉推出试验受力机理研究[J].钢结构,2009,24(9):28-32.
[4]黄彩萍,张仲先,郑舟军,等.钢混组合结构中剪力钉群的力学性能及破坏机理试验研究[J].武汉理工大学学报,2015,37(2):100-105.
[5]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.
[6]OKADA J,YODA T,LEBET J P.A study of the Grouped arrangement of stud connectors on the shear strength behavior[J].Journal of Structural Mechanics&Earthquake Engineering,2006,23(1):75-89.
[7]姬同庚.栓钉连接件剪切刚度试验研究[J].世界桥梁,2013,41(6):62-66.
[8]蔺钊飞,刘玉擎,贺君.焊钉连接件抗剪刚度计算方法研究[J].工程力学,2014,31(7):85-90.
[9]OLLGARD J G.Shear strength of stud connectors in lightweight and normal weight concrete[J].AISC Eng'g Jr,1971,71(10):53-64.
[10]XUE D,LIU Y,YU Z,et al.Static behavior of multi-stud shear connectors for steel-concrete composite bridge[J].Journal of Constructional Steel Research,2012,74(8):1-7.