论文部分内容阅读
混凝土叠合板与钢梁组成的楼盖体系,在地震作用时是否会发生楼板掉落是工程师关心的问题。为此进行了桁架钢筋混凝土叠合板和整浇板与钢梁栓钉连接节点试验。通过施加板面内横向低周反复荷载,获得了两种形式节点的横向抗剪承载力、破坏形态、滞回曲线、位移延性、耗能能力。试验表明两种不同板型节点的横向抗剪承载力、位移延性及耗能能力基本相同,延性系数均小于2。破坏形式为板与栓钉连接处混凝土压碎,同时栓钉发生很大的剪切变形。横向抗剪承载力小于《钢结构设计规范》(GB 50017—2003)的理论计算值,但远大于楼面重力荷载代表值所产生的横向地震作用,故地震时桁架叠合板不会掉落。节点区预制板与后浇混凝土交界侧面应采取构造措施加强连接。
Concrete floor and steel beams composed of the floor system, the earthquake occurs when the floor fall is the concern of engineers. To this end, the truss reinforced concrete composite slab and the pouring plate and steel beam stud connection test. The transverse shear strength, the failure mode, the hysteresis curve, the displacement ductility and the energy dissipation capacity of the two kinds of joints are obtained by applying the low-lateral repeated load in the plane. The tests show that the transverse shear strength, the displacement ductility and the energy dissipation capacity of the two different slab joints are basically the same, and the ductility coefficients are all less than 2. The form of failure is the crushing of the concrete at the joint of the plate with the peg and the great shearing deformation of the peg. The transverse shear capacity is less than the theoretical value of “Design Code for Steel Structures” (GB 50017-2003), but it is much larger than the lateral seismic effect caused by the representative value of the floor gravity load. Therefore, the truss composite plate will not fall during the earthquake. Nodal area prefabricated slab and concrete side of the junction should take structural measures to strengthen the connection.