Experimental study on shear behavior of tie-bars in steel-plate concrete composite structure subjected to cyclic loading
Experimental study on shear behavior of tie-bars in steel-plate concrete composite structure subjected to cyclic loading
复制标题
DOI：
10.1016/j.engstruct.2018.02.070
复制
发表时间：
2018-05
影响因子：
5.5
通讯作者：
C. Zhai;B. Lu;W. Wen;Duofa Ji;Lili Xie
中科院分区：
文献类型：
--
作者：
C. Zhai;B. Lu;W. Wen;Duofa Ji;Lili Xie
在钢板-混凝土组合结构中，拉筋在传递钢板与混凝土之间的剪力方面起着重要的作用。通过12个高强混凝土拉杆推出试件的试验，研究了拉杆在单调荷载和循环荷载作用下的抗剪性能。主要分析参数包括拉杆直径、拉杆强度等级、加载程序和焊接接头结构形式。研究了拉杆的破坏形态、抗剪承载力、剪切滑移、荷载-滑移曲线、抗剪刚度、延性、耗能能力和拉应变分布，并与现有公式计算的拉杆极限抗剪承载力进行了比较。试验结果表明，坡口角焊缝焊接接头相对于本试验中的其他三种焊接接头结构形式，显著提高了拉杆在循环荷载作用下的抗剪承载力（相差33%以上）。随着拉杆直径的增加，试件的抗剪承载力、抗剪刚度和抗剪滑移均显著增加。与单调加载下的拉筋相比，循环加载下的拉筋具有较低的抗剪承载力和剪切滑移能力。抗剪承载力和抗剪滑移率的降低幅度随拉结筋直径的增大而减小，分别为28-42%和58- 67%。加载过程对拉筋拉应变分布有显著影响，根据拉应变分布规律，提出了钢板-混凝土组合结构面外受剪承载力设计的两点建议。
Tie-bars play an important role in the transfer of the shear between the steel faceplate and the concrete in steel-plate concrete composite structure. Twelve push-out specimens were tested to investigate the shear behavior of tie-bars subjected to monotonic and cyclic loadings in high strength concrete. The primary parameters analyzed in this study included tie-bar diameter, tie-bar strength grade, load procedure and welded joint structural type. The failure modes, shear capacities, shear slips, load-slip curves, shear stiffness, ductility, energy dissipation capacities and tensile strain distributions of tie-bars were studied, in addition to comparing the ultimate shear capacities of tie-bars in this experiment with those calculated by an existing formula. The experimental results indicated that the groove fillet welding significantly improved the shear capacities of tie-bars under cyclic loading with respect to other three welded joint structural types in this experiment (The difference is more than 33%). The shear capacity, shear stiffness and shear slip increased significantly with the increase of tie-bar diameter. The tie-bars subjected to cyclic loading exhibited lower shear capacities and shear slips than those under monotonic loading. The reductions of the shear capacity and the shear slip decreased approximately with the increase of tie-bar diameter, and they were 28–42% and 58–67%, respectively. The tensile strain distributions of tie-bars were affected significantly by the load procedure, and according to the distributions, two recommendations were proposed for the design for out-of-plane shear capacity of steel-plate concrete composite structure subjected to bending moment.