（1 山东大学齐鲁交通学院岩土工程系， 济南 250061； 2 山东交通学院交通土建工程学院， 济南 250061）

［摘要］为研究一种新型的预制混凝土板与型钢组合的装配式钢-混凝土组合结构的抗剪性能，开展了4组12个试件（3个整体式现浇钢-混凝土组合结构试件，9个装配式钢-混凝土组合结构试件）的推出试验，分析了该组合结构的破坏形态、荷载-滑移曲线及极限受剪承载力。结果表明，整体式现浇钢-混凝土组合结构试件的破坏形态为栓钉剪断；而装配式钢-混凝土组合结构试件表现为局部的栓钉剪断和混凝土剪切破坏，装配式现浇钢-混凝土组合结构试件极限滑移较整体式现浇钢-混凝土组合结构试件增加1倍，延性得到明显改善；装配式钢-混凝土组合结构试件极限受剪承载力约为整体式现浇钢-混凝土组合结构试件的80%，并满足规范要求；新旧混凝土结合面进行粗糙处理后，装配式钢-混凝土组合结构试件极限受剪承载力提高5%，抗剪钢筋直径由14mm增加为20mm时，装配式钢-混组合结构试件极限受剪承载力提高10%。

［关键词］钢-混凝土组合结构；装配式结构；推出试验；荷载-滑移曲线；极限受剪承载力

中图分类号：TU398-9文献标识码：A文章编号：1002-848X(2021)05-0061-06

Experimental study on shear performance of assembled steel-concrete composite structures

SUN Yanning1, LI Shuchen1, SUN Guofu2, WANG Xiuwei1, WANG Jiugong1

（1 Department of Geotechnical Engineering， School of Qilu Transportation, Shandong University, Jinan 250061, China; 2 School of Traffic Civil Engineering, Shandong Jiaotong University, Jinan 250061, China）

Abstract:In order to study on shear performance of a new type assembled steel-concrete composite structures which consists of precast concrete slab and formed steel, the push-out tests of 4 groups of 12 specimens (3 integral cast-in-situ steel-concrete composite structure specimens, 9 assembled steel-concrete composite structure specimens) were carried out. The failure mode, load-slip curve and ultimate shear capacity of the composite structure were analyzed. The results show that the failure mode of the integral cast-in-situ steel-concrete composite structure specimen is stud shear; while the assembled steel-concrete composite structure specimen shows local stud shear and concrete shear failure. Compared with the integral cast-in-situ steel-concrete composite structure specimen, the ultimate slip of assembled steel-concrete composite structure specimen is doubled and its ductility is significantly improved. The ultimate shear capacity of assembled steel-concrete composite structure specimen can reach 80% of that of the integral cast-in-situ composite structure specimen and meet the requirements of the code. After the interface between the new and old concrete is roughened, the ultimate shear capacity of assembled steel-concrete composite structure specimen is increased by 5%, and the ultimate shear capacity of assembled steel-concrete composite structure specimen is increased by 10% when the diameter of the shear reinforcement is increased from 14mm to 20mm.

Keywords:steel-concrete composite structure;assembled structure;pull-out test;load-slip curve;ultimate shear capacity

作者简介：孙艳宁，硕士，Email:15954785050@163.com；通信作者：孙国富，博士，副教授，Email:gfsunwt@163.com。