水平缝螺栓连接的全装配式复合墙体受力性能试验研究

Experimental Study on Mechanical Behavior of Fully Assembled Composite Wall with Bolted Connection on Horizontal Joints

提出一种用于全装配式复合墙体水平接缝的干式连接方法,通过预埋钢件、L形钢连接件和高强螺栓来连接预制墙体和上、下层结构.为研究采用此种干式连接方式绿色装配式复合墙体的抗震性能和连接件的受力性能,以钢连接件厚度和高强螺栓规格(直径和预拉力)为关键参数,设计5榀墙体试件进行单调加载试验,对试件的破坏模式、水平荷载-位移曲线、特征值点、抗震性能指标、连接件的应变、连接件与墙板的相对滑移进行研究.研究结果表明:水平缝采用螺栓连接的试件变形能力较强,极限位移角达1/25时仍具有较高的承载力;增加钢连接件厚度可提升试件的承载力和初始刚度,但高强螺栓规格对试件承载力和刚度无明显影响.

A dry connection method for horizontal joints of fully assembled composite walls is proposed in this paper.The prefabricated wall and the upper and lower structure are connected by pre-buried steel parts,L-shaped steel plates and high-strength bolts.In order to study the seismic performance of the composite wall and the mechanical behaviour of the joints,5 specimens were designed with the thickness of steel plate and the high-strength bolt specifications(diameter and pre-tension)as key parameters.A monotonic loading test was performed to study the failure mode,horizontal load-displacement curve,eigenvalue point,seismic performance index,strain of the joint,and relative slip of the joint and the wallboard of the test piece.The results of experimental research show that the specimens with bolted connections on horizontal joints have strong deformation ability,where the ultimate displacement angle is up to 1/25,and they still have high bearing capacity.Increasing the thickness of jointed steel plates can improve the bearing capacity and initial stiffness of the specimens,but the specifications of the high-strength bolt have no obvious influence on the bearing capacity and rigidity of the specimen.