【摘要】 提出了以剪切变形为主的密肋复合墙体的弹塑性宏模型。宏模型由三根竖杆单元组成,分别模拟密肋复合墙体的墙板和边柱。宏模型以有限元为基础,但自由度比有限元模型少得多。在使用SAP 2000中的Link单元建立宏模型时,推导了Link单元的刚度矩阵,给出了相对转动中心高度的确定方法,并结合钢筋混凝土柱轴向恢复力模型和密肋复合墙体水平剪切恢复力模型,给出了Link单元塑性铰力-位移关系的计算公式。通过压、弯、剪复合作用下的密肋复合墙体的试验结果与计算结果比较表明,该计算模型原理清晰,具有较好的计算精度,适合于密肋壁板结构体系的非线性时程反应分析。更多还原

【Abstract】 An elastoplastic macro-model is presented for multi-ribbed composite walls with shear deformation.The model is composed of three vertical line elements to simulate the composite slab and end columns respectively.The model is based on the finite element but with much less degrees of freedom.When the Link element in SAP 2000 is used to establish model,the element stiffness matrix of link element is deduced.A defining method is developed to determine the location of the shear spring.Combined with hysteretic axial model of reinforced concrete columns and hysteretic shear model of composite walls,the calculating formula for force-displacement relationship of plastic hinges in link element is derived.By using this model,nonlinear analysis of the wall is performed.Comparing with the experimental results,it shows that the model is characterized by clearness in principle,preferable calculating precision.It’s suitable for nonlinear time-history analysis of multi-ribbed slab structure.更多还原