【摘要】 考虑节点半刚性的影响下,建立了预压装配式预应力混凝土框架在竖向荷载作用下的内力分析模型,采用螺旋弹簧模拟节点连接的半刚性,导出了梁端节点相对转动刚度K不同时的杆件单元刚度矩阵,并对试验框架进行了受力验算。研究表明,在节点半刚性的影响下,预压装配式PC框架梁端弯矩有所降低,较按节点刚接计算,框架受力更接近于实际状态,与试验值吻合较好。更多还原

【Abstract】 Considering the effect of the semi-rigid joints,this paper makes the internal force analysis model of the prestressed precast concrete(PC)frame under a vertical load.We simulate the semi-rigid joint connection in the form of the helical spring to develop the beam element stiffness matrix due to different relative rotation stiffness of the joints at beam ends,and then,make a loaded analysis of the testing frame.The research indicates that the beam ends of the prestressed PC frame have a somewhat lower moment under the influence of the semi-rigid joints.Compared with the simulation of rigid joints,the beam end moment is more approximate to the actual state and experimental results.更多还原