后置钢牛腿的有限元受力分析  

Finite Element Stress Analysis of Rear Steel Bracket

作　　者：沈建湘 张璞 苏小贝 SHEN Jianxiang;ZHANG Pu;SU Xiaobei(Key Office of Guangzhou Funeral Service Center Guangzhou 510030,China;Guangzhou Retirement Home Guangzhou 510900,China)

机构地区：[1]广州市民政局重点办,广州510030 [2]广州市老人院,广州510900

出　　处：《广东土木与建筑》2023年第12期77-78,81,共3页Guangdong Architecture Civil Engineering

摘　　要：接合实际项目两建筑物间加建的钢结构连廊,设计支座牛腿的情况,利用有限元软件ANSYS建立两种牛腿计算力学模型,设置接触单元,模拟后置钢牛腿节点受力状态,得出牛腿各个部位的应变和位移,及牛腿的破坏机理和各个部件的破坏形态;对比两种模型计算结果,工字型牛腿极限承载力和位移变形均优于双肋型牛腿,但钢顶板与锚板相接处的集中应力双肋型更均匀,建议设计中优先选用工字型牛腿。顶排和第二排锚栓为节点关键构件,最先屈服,随着荷载加大,中间排锚栓也逐渐屈服。Combining the steel structure corridor added between two buildings in the actual project,designing the support bracket,using the finite element software ANSYS to establish two types of bracket calculation mechanical models,setting up contact elements,simulating the stress state of the post steel bracket nodes,and obtaining the strain and displacement of each part of the bracket,as well as the failure mechanism of the bracket and the failure form of each component;Comparing the calculation results of the two models,the ultimate bear‐ing capacity and displacement deformation of the I-shaped bracket are better than those of the double ribbed bracket.However,the concen‐trated stress of the double ribbed bracket at the junction of the steel top plate and anchor plate is more uniform.It is recommended to priori‐tize the use of the I-shaped bracket in the design.The top and second row anchor bolts are key components of the node,which yield first.As the load increases,the middle row anchor bolts also gradually yield.

关 键 词：钢牛腿 接触单元 有限元分析 应力 

分 类 号：TU391[建筑科学—结构工程]