钢-橡胶集料混凝土组合结构中群钉效应分析  

Analysis of Stud Group Effect in Steel Rubber Aggregate Concrete Composite Structure

作　　者：邱凯 刘洋 王有志[1] 田长进 杜业峰 QIU Kai;LIU Yang;WANG Youzhi;TIAN Changjin;DU Yefeng(School of Civil Engineering,Shandong University,Jinan 250061,China;Shandong Luqiao Construction Co Ltd,Jinan 250014,China)

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]山东鲁桥建设有限公司,山东济南250014

出　　处：《土木工程与管理学报》2021年第6期188-196,共9页Journal of Civil Engineering and Management

摘　　要：为了研究钢–橡胶集料混凝土组合结构中栓钉的群钉效应,以不同橡胶掺量的混凝土为参数开展ABAQUS有限元精细分析,明确不同混凝土环境下栓钉的工作状态,揭示栓钉间距、尺寸对群钉效应的影响规律,进而提出考虑橡胶含量及折减系数的栓钉抗剪承载能力计算公式。研究结果表明:群钉效应使栓钉的单钉平均抗剪承载能力及抗剪刚度降低,并且导致了栓钉变形及荷载传递不均匀现象;栓钉单钉平均抗剪承载能力折减系数及不均匀系数随着橡胶掺量的增加逐渐增大;栓钉最优层间距为110 mm(6.8倍栓钉钉身直径),此时栓钉抗剪承载能力及抗剪刚度最大;提出的单钉平均抗剪承载能力计算公式,可为橡胶混凝土中栓钉群的合理布置提供数据支撑与理论指导。In order to study the group nailing effect of steel rubber aggregate concrete composite structure,ABAQUS finite element analysis was carried out with concrete with different rubber content as parameters to clarify the working state of stud under different concrete environment,and reveal the influence of stud spacing and size on group nail effect,and then put forward the calculation method of shear bearing capacity of stud considering rubber content and reduction coefficient in this paper.The results show that:the group effect reduces the average shear bearing capacity and shear stiffness of single stud,and leads to the uneven deformation and load transfer;the average shear bearing capacity reduction coefficient and non-uniformity coefficient increase gradually with the increase of rubber content;the optimal layer spacing of stud is 110 mm(6.8 times the diameter of stud),the formula can provide data support and theoretical guidance for the rational arrangement of stud groups in rubber concrete.

关 键 词：橡胶集料混凝土 群钉效应 折减系数 抗剪承载能力计算公式 

分 类 号：TU398[建筑科学—结构工程]