长细比对轴压下高强拼合冷弯薄壁型钢受力性能影响研究
Study on influence of slenderness ratio on mechanical properties of high strength assembled cold-formed thin-walled steel under axial compression
韩建强 1李秋绪 2张玉敏 1王宇亮1
作者信息
- 1. 华北理工大学建筑工程学院,唐山 063210;河北省地震工程与防灾重点实验室,唐山 063210
- 2. 华北理工大学建筑工程学院,唐山 063210
- 折叠
摘要
为研究长细比对轴压下壁厚小于 1mm的高强拼合冷弯薄壁型钢力学性能的影响,基于《冷弯薄壁型钢结构技术规范》(GB 50018-2002)设计并制作了壁厚为 0.8mm的S550 级单肢C形截面立柱和开口双肢组合截面立柱共 12 根试件.长细比分别为 30、40、50、60、70、80,通过控制基本试件尺寸不变,分别改变试件高度进行试验研究.分析结果表明,立柱截面相同时,壁厚为0.8mm的S550 级冷弯薄壁型钢试件的轴压承载力随长细比增大呈下降趋势,按照《冷弯薄壁型钢结构技术规范》(GB 50018-2002)中的相关公式计算是偏于安全的;相同长细比条件下,开口双肢组合截面立柱的极限承载力是单肢C形截面立柱的 2.03～2.13 倍.
Abstract
In order to study the influence of slenderness ratio on the mechanical properties of high-strength assembled cold-formed thin-walled steel with wall thickness less than 1mm under axial compression,a total of 12 specimens of S550 single-limb C-shaped cross-section column and open double-limb combined cross-section column with wall thickness of 0.8mm were designed and manufactured based on the Technical specification for cold-formed thin-walled steel structures(GB 50018-2002).The slenderness ratios were 30,40,50,60,70 and 80 respectively.The height of the specimens was changed respectively for experimental research by controlling the size of the basic specimens.The analysis results show that when the cross section of the column is the same,the axial compression bearing capacity of the S550 cold-formed thin-walled steel specimen with a wall thickness of 0.8mm decreases with the increase of the slenderness ratio,and it is safe to calculate according to the relevant formula in the Technical specification for cold-formed thin-walled steel structures(GB 50018-2002).Under the same slenderness ratio,the ultimate bearing capacity of the open-ended double-limb composite section column is 2.03～2.13 times that of the single-limb C-shaped section column.
关键词
高强冷弯薄壁型钢/长细比/拼合截面/力学性能Key words
high strength cold-formed thin-walled steel/slenderness ratio/split section/mechanical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据