正交胶合木约束钢板剪力墙的约束板厚需求

Demand of Thickness of Restrained Panel for Steel Plate Shear Wall with Cross Laminated Timber Restrained Plane

为探究CLT板对钢板剪力墙的约束机理,基于ABAQUS对其进行有限元模拟。结果表明:相比于混凝土约束板,CLT约束板仅使得钢板剪力墙弹性阶段的最高承载力与刚度略微降低,但在一定程度上降低了结构自重,木材的高延性还可以在约束板产生较大面外变形时仍保持墙体的完整性,使得约束板可以持续发挥对钢板的约束作用。通过数据拟合,得到单面CLT板约束改进型钢板剪力墙在达到2 rad层间位移角时,约束板厚度与其面外变形关系的拟合公式。研究结果可为屈曲约束式钢板剪力墙的设计提供理论参考。

In order to explore the constraint mechanism of CLT plates on steel plate shear walls,finite element simulation was conducted based on ABAQUS.The restrain mechanism of CLT plane on CLT-SPW were studied.The results showed that compared with the concrete restrain plane,the largest capacity and stiffness of the steel plate shear wall in the elastic stage only slightly reduced by the CLT restrain plane,but the self-weight of the structure was reduced.The high ductility of wood can also maintain the integrity of the wall when the restraint plate produces large out-of-plane deformation,so that the restrain plane can continue to play a role in restraining the steel plate.Through data fitting,a formula for the relationship between the thickness of the restrain plane and the out-of-plane deformation of the restrain plane when the drift ratio of CLT-SPW reaches 2 rad were also given.The results can provide theoretical reference for the buckling-restrained steel plate shear wall design.