（1 山東大學齊魯交通學院巖土工程系， 濟南 250061； 2 山東交通學院交通土建工程學院， 濟南 250061）

［摘要］為研究一種新型的預制混凝土板與型鋼組合的裝配式鋼-混凝土組合結構的抗剪性能，開展了4組12個試件（3個整體式現澆鋼-混凝土組合結構試件，9個裝配式鋼-混凝土組合結構試件）的推出試驗，分析了該組合結構的破壞形態、荷載-滑移曲線及極限受剪承載力。結果表明，整體式現澆鋼-混凝土組合結構試件的破壞形態為栓釘剪斷；而裝配式鋼-混凝土組合結構試件表現為局部的栓釘剪斷和混凝土剪切破壞，裝配式現澆鋼-混凝土組合結構試件極限滑移較整體式現澆鋼-混凝土組合結構試件增加1倍，延性得到明顯改善；裝配式鋼-混凝土組合結構試件極限受剪承載力約為整體式現澆鋼-混凝土組合結構試件的80%，并滿足規范要求；新舊混凝土結合面進行粗糙處理后，裝配式鋼-混凝土組合結構試件極限受剪承載力提高5%，抗剪鋼筋直徑由14mm增加為20mm時，裝配式鋼-混組合結構試件極限受剪承載力提高10%。

［關鍵詞］鋼-混凝土組合結構；裝配式結構；推出試驗；荷載-滑移曲線；極限受剪承載力

中圖分類號：TU398-9文獻標識碼：A文章編號：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

作者簡介：孫艷寧，碩士，Email:15954785050@163.com；通信作者：孫國富，博士，副教授，Email:gfsunwt@163.com。