SFRC栓钉-橡胶连接件力学性能非线性有限元分析

Nonlinear Finite Element Analysis of Mechanical Properties of SFRC Rubber-sleeved Stud Shear Connector

为研究钢纤维混凝土(SFRC)栓钉-橡胶连接件的力学性能,采用ABAQUS软件对其进行非线性有限元计算,比较分析不同橡胶套高度下SFRC栓钉-橡胶连接件与SFRC普通栓钉连接件抗剪承载力、抗剪刚度等力学性能差异。研究结果表明,采用ABAQUS/standard求解器能较好地模拟SFRC栓钉-橡胶连接件推出试验;采用橡胶包裹栓钉后,连接件抗剪承载力基本保持不变,抗剪刚度显著减小(约为SFRC普通栓钉连接件的50%);橡胶套高度变化(h_(r)=25,50,75 mm)对其抗剪刚度与抗剪承载力影响较小;组合连接件橡胶套高度建议取栓钉高度的50%。

In order to study the mechanical properties of steel fiber reinforced concrete(SFRC)rubber-sleeved stud shear connector,the nonlinear finite element calculation of push-out tests was carried out by ABAQUS software.The shear bearing capacity and shear stiffness between SFRC rubber-sleeved stud shear connector with different rubber sleeve height and ordinary stud shear connector were compared and analyzed.The results show that the push-out test of SFRC rubber-sleeved shear connector can be better simulated by ABAQUS/standard solver.After stud shear connectors are wrapped around rubber strip with thickness of 5 mm and height of 50 mm,the shear bearing capacity of the connectors remains basically unchanged,and the shear stiffness is about 50%of that of ordinary stud connectors.The change of rubber sleeve height(h_(r)=25,50,75 mm)has little effect on the shear stiffness and shear bearing capacity.The height of the rubber sleeve is recommended to be 50%of the height of the stud for SFRC stud-rubber connector,which provides reference for practical engineering application of SFRC stud-rubber connector.