【摘要】 采用SAP程序中的Link单元进行了密肋壁板结构非线性时程反应分析。推导了Link单元的刚度矩阵,确定了相对转动中心高度。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抗侧恢复力模型,给出了Link单元竖向和水平连接弹簧非线性力-位移关系的计算公式。采用Link单元建立了密肋壁板结构宏观有限元分析模型,并对1/10比例振动台模型试验进行了非线性时程反应分析。结果表明:计算结果与试验结果吻合良好,这说明采用Link单元可以较好的模拟密肋壁板结构的动力非线性行为。更多还原

【Abstract】 Multi-ribbed walls are important lateral load-resisting elements in a multi-ribbed slab structure,but the nonlinear dynamic behavior of the walls is difficult to simulate appropriately.This paper presents a matrix analysis of shear walls using the Link element in SAP2000.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 springs in Link element is derived.The macro-analysis FEM model of the multi-ribbed composite slab structure is built up by Link elements.The macro model is adopted for the non-linear earthquake response of 1/10 model in shaking table test and its earthquake response is given.It shows that the model is characterized by clearness in principle,preferable calculating precision.It’s suitable for nonlinear time-history analysis of moderate-high storied multi-ribbed slab structure.更多还原