摘要
对单轴对称工字形截面钢梁在跨中布置2个侧向支承、荷载类型及荷载位置不同的情况下钢梁的整体稳定性进行研究,并利用ANSYS通用有限元分析软件中的SHELL181单元,对规范和近似解析解的精度进行验证。研究结果表明,在跨中有2个支承的条件下,钢梁临界弯矩的规范与近似解析解与FEM解答之间的误差较大,需要引起设计者和规范编制者的关注。
By using shell 181 element of ANSYS general finite element analysis software,the overall stability of I-section steel beam with uniaxial symmetry is studied under the condition of two lateral supports,different load types and load positions,and the accuracy of the GB code and approximate analytical solution is verified.The results show that the critical moments of the beam with two lateral supports in the span predicted by the GB code and approximate analytical solution have a great differences with that predicted by FEM simulation,which needs special attention of the designer and the code maker.
出处
《江苏建材》
2020年第3期32-35,共4页
Jiangsu Building Materials
基金
国家自然科学基金面上项目“钢管混凝土翼缘工字形梁弯扭屈曲和畸变屈曲理论与设计方法研究(51578120)”和“方钢管混凝土框架柱低周疲劳性能的试验与理论研究(51178087)”。
关键词
侧向支承
单轴对称截面
工字形梁
有限元
临界弯矩
lateral support
uniaxial symmetric section
I-beam
finite element
critical moment
