摘要
由于冷弯薄壁构件截面厚度较薄,当无横向加劲肋时,构件可能会在集中荷载作用处发生腹板压跛现象,我国现行《冷弯薄壁型钢结构技术规范》(GB 50018—2002)仅对压型钢板给出了验算公式,但对常用的C形、Z形截面构件并未进行具体规定。综合分析国外相关标准的规定,并考虑我国结构设计的实际情况,给出了统一的冷弯薄壁构件腹板局部受压承载力的计算公式。由试验数据、数值分析和设计算例的对比可以看出,该公式适用于压型钢板及C形、Z形截面的冷弯薄壁构件,为现行规范GB 50018—2002的修订提供依据。
Because of the thin sectional plate,the web crippling may happen under concentrated load at the web of cold-formed thin-wall member without transverse stiffeners. The Technical code of cold-formed thin-wall steel structures( GB50018—2002) only provides the checking formula for profiled steel sheet,but has no specific provisions for the commonly used C-shaped and Z-shaped members. Investigated the provisions of foreign standards comprehensively,and considered the actual conditions of domestic structural design,the common formula calculating local bearing capacity for the web of cold-formed thin-wall member was given. Through comparison with experimental data,numerical analysis and design example,it shows that this formula can apply not only to the profiled steel sheet but also to the C-shaped and Z-shaped cold-formed thin-wall members,which provides the basis for amendments of current code GB 50018—2002.
出处
《建筑结构》
CSCD
北大核心
2015年第5期86-90,共5页
Building Structure
基金
国家自然科学基金青年科学基金项目(51308442)
陕西省教育厅专项科研项目(2013JK0976)
关键词
冷弯薄壁构件
腹板压跛
局部受压承载力
计算公式
数值分析
cold-formed thin-wall member
web crippling
local bearing capacity
formula
numerical analysis
