既有剪力墙开洞粘钢加固模拟研究

针对一个既有建筑物中出现的剪力墙开洞问题,运用ANSYS建立了剪力墙开洞粘钢加固前后的有限元模型,从侧移与承载力方面研究其加固效果。结果表明:既有剪力墙开洞后,墙体的承载力下降较多,墙体的顶点最大位移超过规范要求;在洞口的右上角、左下角有明显的应力集中现象;当在洞口四周及墙肢外框对开洞剪力墙进行粘钢加固时,增强了洞口周围薄弱区域,减少了加固前洞口应力集中,其承载力、侧移均满足规范要求。

Simulation study on shear wall with opening strengthened by bonded steel

With the opening issues of existing building shear wall arising, I use ANSYS to build finite element model of shear wall with opening before and after the reinforcement of sticking steel, and focus on the analyzing of its strengthening effect from the aspects of lateral sway and bearing capacity. The results show that the bearing capacity of wall body declined more, and the maximum vertex displacement of wall body was over the required specification when the wall opened hole. Besides, it has concentrated phenomenon obviously in the upper right corner and the lower left corner of shear walls with opening. When the shear wall with opening were strengthened by sticking steel around hole and the outline border of wall limb, it will strengthen the weak region, and reduce its hosted force before the reinforcement, so that the lateral sway and the bearing sway will meet the requirement of specification.