钢板-混凝土组合板受弯性能试验研究

Experimental study on flexural capacity of steel plate-concrete composite slabs

以钢板代替受力钢筋,通过栓钉将外侧钢板与内部混凝土板相连,二者共同作用形成钢板-混凝土组合板。根据钢板布置形式的不同,可将钢板-混凝土组合板分为单面钢板-混凝土组合板(SSC)和双面钢板-混凝土组合板(DSC)。通过对4个SSC试件和3个DSC试件的受弯试验研究,分析了不同钢板厚度、抗剪连接程度以及构造钢筋配置对组合板受弯性能和破坏形态的影响。试验结果表明,按完全抗剪连接设计的试件破坏形态与适筋梁相似,具有良好的受弯承载能力和延性;当受拉区钢板采用部分抗剪连接设计时,剪跨区栓钉易剪断导致承载力明显降低;当受压区钢板采用部分抗剪连接设计时,顶层钢板易发生局部屈曲,导致试件承载力和延性有所降低。基于试验结果,给出了钢板-混凝土组合板的受弯承载力计算式,计算值与试验值吻合较好。

Using steel plate to replace the traditional reinforcement, steel plate-concrete composite slabs are formed of steel plate skins connected to an infill of concrete plate with welded stud connectors. According to different arrangement of steel plate, the composite slabs can be divided into single side steel plate-concrete composite slabs （SSC） and double sides steel plate-concrete composite slabs （DSC）. In this paper, test of four SSC and three DSC specimens with different steel plate thickness, degree of shear connection and arrangement of the constructional reinforcement were carried out to study the effect of variables considered on the bending performances and the failure mode of the composite slabs. The tests results indicate that specimens with full shear connection show good performance on flexure strength and ductility in the loading process like reinforced beams. For specimens with partial shear connection in tension steel plates, the fracture of shear studs in shear spans decrease the flexural capacity greatly; for specimens with partial shear connection in compression steel plates, the buckling of steel plates under compression would decrease both the strength and the ductility. Based on the test results, the formulas for calculating the flexural capacity of steel plate-concrete composite slabs were also proposed. The calculation values show a good agreement with the tests results.