弹塑性工字形钢梁换算截面法的适用性  

Applicability of the conversion section method for elastic plastic I-shaped steel beams

作　　者：宋旭旭 张文福[2] 宗兰[2] 黄斌 许庆 

机构地区：[1]安徽建筑大学,安徽合肥230601 [2]南京工程学院,江苏南京211167

出　　处：《江苏建材》2019年第1期33-35,共3页Jiangsu Building Materials

基　　金：国家自然科学基金项目(51178087)和(51578120);南京工程学院科研基金项目(YKJ201617)

摘　　要：采用换算截面法将弹塑性工字形钢梁换算成纯弹性工字形钢梁来解决其弯扭屈曲的问题。应用ANSYS有限元软件,分别对弹塑性工字形钢梁和换算截面后的纯弹性工字形钢梁进行了弯扭屈曲分析。分析显示,两种截面的临界弯矩值相差很小,说明在对弹塑性工字形钢梁进行弯扭屈曲分析时,换算截面法非常适用。换算后的工字形钢梁为纯弹性的,有助于简化弹塑性工字形钢梁弯扭屈曲问题的分析过程。This paper uses the method of conversion section to convert elastic plastic I-shaped steel beams into pure elastic I-shaped steel beams,so as to solve the problems of bending and buckling. Using the ANSYS finite element software, the bending and buckling analysis of elastic plastic I-shaped steel beam and pure elastic I-shaped steel beams after conversion section are carried out. The results show that the critical moment error is very small, which indicates that the conversion section method is suitable for the bending and buckling analysis of elastic plastic I-shaped steel beams. The converted I-shaped steel beam is purely elastic, which helps to simplify the analysis of the bending and buckling problems of elastic plastic I-shaped steel beams.

关 键 词：工字形钢梁 弹塑性 换算截面法 弯曲屈曲 有限元法 

分 类 号：TU391[建筑科学—结构工程]