后锚固钢牛腿的有限元分析

Finite Element Analysis of Post Anchored Steel Corbel

结合工程实际,选用ABAQUS有限元分析软件,对后锚固钢牛腿进行了非线性有限元分析。结果表明:加载初期,顶排中间锚栓(该锚栓为关键构件)位置应力较大;钢牛腿顶板与锚板连接处应力明显大于其他位置,受力较集中;随着载荷增大,钢牛腿顶板与锚板相连位置的应力明显增大,且顶排锚栓孔附近应力增大,局部逐步达到屈服应力,存在受力集中问题;钢牛腿顶板与锚板相连处在整个钢牛腿中最先达到全截面屈服,而顶排锚栓孔附近区域只是逐渐出现屈服现象;所分析后锚固钢牛腿承载能力能满足工程需求。

Based on practical engineering,the nonlinear finite element analysis of the post anchored steel corbel is carried out in this paper,by the finite element software ABAQUS.The results show that at the initial stage of loading,the stress at the middle anchor bolt of the top row is large,and the anchor bolt is a key component.The stress at the position where the steel corbel top plate is connected with the anchor plate is significantly greater than that at other positions,where the stress is concentrated.With the increase of load,the stress value at the connection position between the top plate of the steel bracket and the anchor plate significantly increases,and the stress near the top row anchor bolt holes is relatively high,reaching yield stress locally and resulting in a problem of stress concentration.The connection between the steel corbel top plate and the anchor plate first reaches the full section yield,and gradually yields near the top row anchor bolt hole.The bearing capacity of the post anchored steel corbel designed in this project meets the engineering requirements.