In order to meet the needs of the rapid development of super high-rise buildings and modern industrialized residential building systems,a new type of plate-reinforced composite(PRC)coupling beam with steel bar truss deck is proposed.The failure mode,bearing capacity,deformation capacity and energy dissipation capacity of PRC coupling beams without considering the effect of floor slab,with ordinary reinforced concrete(RC)floor slab and with steel bar truss deck were studied by quasi-static test.At the same time,ABAQUS software was used to analyze the stress development of concrete,steel plate and steel skeleton of PRC coupling beam with steel bar truss deck under different peak loads.The results indicate that the shear bearing capacity and ductility of the coupling beam can be significantly improved with steel bar truss deck,and the setting of steel bar truss deck can significantly increase the peak load of the coupling beam,and the improvement of the bearing capacity of PRC coupling beam with steel bar truss deck is stronger than that with RC slab.The forward peak load of specimen PRC-S3 is 31%and 18%higher than that of PRC-NS1 and PRC-S2,respectively,but the stiffness degradation of the coupling beams with slabs were more serious after cracks were produced at the junction of beams and slabs.PRC coupling beams with steel bar truss deck have superior energy dissipation capacity,and there are significant diagonal compressive struts in the span of the coupling beams.The main compressive strut and its derivative compressive struts together constitute the truss to bear the shear force.Stress concentration occurs at the bottom of the coupling beam in the upper and lower chord reinforcement of the truss and the longitudinal reinforcement of the coupling beam,and the cumulative energy dissipation corresponding to the failure point of the coupling beam specimen PRC-S3 is 1.39 times that of the specimen PRC-NS1 without slab.
关键词
钢板-混凝土组合连梁/钢筋桁架楼承板/带板连梁/抗震性能/耗能能力/非线性有限元分析
Key words
plate-reinforced composite coupling beam/steel bar truss deck/coupling beam with slab/seismic behavior/energy dissipation capacity/nonlinear finite element analysis
维普
万方数据