钢-聚氨酯组合剪力墙抗剪承载力研究

Study on Shear Resistance of Steel Polyurethane Composite Shear Wall

以等效拉-压杆简化模型模拟钢-聚氨酯组合剪力墙在水平位移荷载作用下的受力机理,受拉区以钢板受拉条带作为拉杆的简化基础,受压区以组合压杆形式模拟结构面外变形对结构承载力的影响。利用该简化模型推导新型组合剪力墙抗剪承载力的计算公式,所以实体模型的抗剪承载力即为简化模型中拉杆与组合压杆的承载力之和。经过对弹簧刚度k的参数分析,得到k与结构水平位移之间的线性表达式,最终计算的荷载-位移曲线与有限元模拟曲线吻合的较好。说明简化模型适用于该新型组合剪力墙,并且也验证了理论计算的正确性。

The simplifide model of ension-compression strip model is proposed to simulate the mechanical behavior of steel polyurethane composite shear wall under horizontal displacement loading.The steel strip is used as simplification basis of the tie rod in the tension zone,and the influence of out-plane deformation of compression rod structure on the structural bearing capacity in the compression zone is simulated.The simplified model is used to derive formula for the shear capacity of the new type composite shear wall,so the shear capacity of new shear wall is the sum of the bearing capacity of the tie rod and the combined compression rod in the simplified model.After the parameter analysis of the spring stiffness k,a linear expression between k and the horizontal displacement of the structure is obtained.Finally,the calculated curve and the finite element simulation curve agree well.It shows that the simplified model is applicable to this new type of composite shear wall and the correctness of the theoretical calculation is also verified.