防屈曲钢板剪力墙地震损伤研究

Research on seismic damage of anti buckling steel plate shear walls

防屈曲钢板剪力墙作为一种新型的抗侧力构件,实际使用时需要将墙板嵌入受弯框架,为了研究防屈曲钢板剪力墙在地震后的性能退化情况,使用有限元软件ABAQUS建立了两层单跨钢框架-防屈曲钢板剪力墙模型,在验证防屈曲钢板剪力墙有限元建模方法可行性的基础上,针对不同高厚比的防屈曲钢板剪力墙构件进行低周循环加载。研究发现:增大内嵌钢板的厚度可以有效提高防屈曲钢板剪力墙的抗剪强度;加载过程中刚度下降平缓,具有较好的稳定性;防屈曲钢板剪力墙具有较好的塑性变形能力和耗能能力。通过分析防屈曲钢板剪力墙的地震损伤可为后续地震中受损的防屈曲钢板剪力墙的加固修复提供参考。

As a new type of lateral force resistant component,anti buckling steel plate shear walls need to be embedded in bending frames during actual use.In order to study the performance deg-radation of anti buckling steel plate shear walls after earth-quakes,a two-story single span steel frame anti buckling steel plate shear wall model was established using the finite element software ABAQUS.On the basis of verifying the feasibility of the finite element modeling method for anti buckling stel plate shear walls,low cycle cyclic loading is applied to anti buckling steel plate shear wall components with different height to thickness ra-tios.Research has found that increasing the thickness of embed-ded steel plates can effectively improve the shear strength of anti buckling steel plate shear walls;During the loading process,the stiffness decreases smoothly and has good stability;Buckling re-sistant steel plate shear walls have good plastic deformation and energy dissipation capabilities.By analyzing the seismic damage of anti buckling steel plate shear walls,reference can be provided for the reinforcement and repair of damaged anti buckling steel plate shear walls in subsequent earthquakes.