赵根田, 侯智译, 高鹏, 王达. 拟静力作用下群钉连接件抗剪性能研究[J]. 工程力学, 2020, 37(7): 201-213. DOI: 10.6052/j.issn.1000-4750.2019.09.0513
引用本文: 赵根田, 侯智译, 高鹏, 王达. 拟静力作用下群钉连接件抗剪性能研究[J]. 工程力学, 2020, 37(7): 201-213. DOI: 10.6052/j.issn.1000-4750.2019.09.0513
ZHAO Gen-tian, HOU Zhi-yi, GAO Peng, WANG Da. STUDY ON SHEAR PERFORMANCE OF GROUP STUD CONNECTOR UNDER THE QUASI-STATIC LOAD[J]. Engineering Mechanics, 2020, 37(7): 201-213. DOI: 10.6052/j.issn.1000-4750.2019.09.0513
Citation: ZHAO Gen-tian, HOU Zhi-yi, GAO Peng, WANG Da. STUDY ON SHEAR PERFORMANCE OF GROUP STUD CONNECTOR UNDER THE QUASI-STATIC LOAD[J]. Engineering Mechanics, 2020, 37(7): 201-213. DOI: 10.6052/j.issn.1000-4750.2019.09.0513

拟静力作用下群钉连接件抗剪性能研究

STUDY ON SHEAR PERFORMANCE OF GROUP STUD CONNECTOR UNDER THE QUASI-STATIC LOAD

  • 摘要: 为研究低周往复荷载作用下群钉连接件的劣化过程和退化机理,以栓钉直径、混凝土强度等级、加载方式为参数设计9个试件进行试验,并采用ABAQUS进行精细分析,研究群钉抗剪连接件的破坏模式、刚度退化、损伤累积、抗剪承载力及能量耗散等指标。结果表明:混凝土强度相同时,试件的抗剪承载力随栓钉直径的增加而提高,而抗剪刚度和能量耗散等指标变化不明显。对于直径较大的栓钉,各项性能指标还会出现劣化。混凝土强度增加,试件的抗剪承载力和抗剪刚度提高,耗能增加,滑移值减小。低应力循环加载时,试件较早出现损伤累积,其损伤累积速度随栓钉直径的增大而增加。高应力循环加载时,试件表现出损伤累积滞后现象,在第3个循环节开始出现损伤快速累积。群钉多层排列时,栓钉传力不均匀,靠近加载端的栓钉承担的剪力大于其他栓钉。当混凝土强度在C35和C45之间时,建议采用直径16 mm的栓钉与之搭配。

     

    Abstract: To study the deterioration process and degradation mechanism of stud connectors under low-cycle reciprocating load, nine specimens were designed with the stud diameter, concrete strength and loading scheme as the parameters. The specimens were subjected to quasi-static low-cycle reciprocating load. Based on the experimental results, the model performance was simulated by the finite element software ABAQUS. The failure mode, stiffness degradation, damage accumulation and energy dissipation performance of stud shear connectors were analyzed. The results show that when the concrete strength is the same, the shear strength of the specimen increases with the increase of the diameter of the bolts. The effect on the shear stiffness and energy dissipation performance is not obvious. With studs of a large diameter, the performance index of the specimen will decline. The increase in concrete strength can improve the shear strength, shear stiffness and energy dissipation of the specimen, but the displacement of the specimens is decreased. When a reciprocating cycle is loaded at a low stress, early damage accumulation occurs in the test. The speed of injury accumulation increases with the increase of the diameter of the bolts. When a high stress cycle is loaded, the test shows an accumulation lag of damage, and rapid damage accumulation begins in the third cycle section. When the group studs are arranged in multiple layers, the shear force of the studs near the loading end is greater than that of the other studs as a result of the uneven transfer among the studs. When the concrete strength is between C35 and C45, it is recommended to use studs of a diameter of 16 mm to match it.

     

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