抗弯强度
结构工程
轮缘
梁(结构)
三点弯曲试验
弯曲模量
力矩(物理)
参数统计
失效模式及影响分析
材料科学
章节(排版)
还原(数学)
弯曲
冷弯型钢
有限元法
弯矩
工程类
计算机科学
物理
数学
几何学
操作系统
统计
经典力学
作者
Feiyun Deng,Yulong He,Lu Deng,Wenjie Zhong
出处
期刊:Buildings
[Multidisciplinary Digital Publishing Institute]
日期:2022-10-09
卷期号:12 (10): 1639-1639
被引量:4
标识
DOI:10.3390/buildings12101639
摘要
Cold-formed steel (CFS) is a typical green building material with the merits of being low-cost, lightweight, high-strength, and recyclable. CFS built-up section beams are widely used in CFS frames owing to their outstanding mechanical properties. However, a simplified and accurate method for calculating the flexural moment capacity of multi-limb built-up beams is missing in specifications. In this study, the flexural behaviors of CFS four-limb built-up beams with closed and open sections are investigated via experiments and finite element (FE) modeling. Firstly, the flexural moment capacities and failure modes of the beams are obtained by four-point bending experiments. The ultimate load capacity of the new open section beam is found to be higher than that of the closed section beam, and the failure mode is local buckling of the web and upper flange. Then, the FE models validated by the tests are developed to conduct an extensive parametric study. Numerical results show that the flexural moment capacity increases with the thickness and web depth. Finally, a simplified calculation method for the flexural moment capacities of the closed and open section beams is proposed by considering the reduction factor of gross section modulus of the built-up section.
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