冷弯中厚壁矩形管屈服强度设计公式研究  

Research on design formula for yield strength of cold-formed rectangular steel tubes with medium-thick wall

作　　者：童乐为[1,2] 霍涛 侯刚 TONG Lewei;HUO Tao;HOU Gang,(State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Shanghai Engineering Research Center of Assembly Building Technology Integration,Shanghai 200011,China;East China Architectural Design ＆ Research Institute Co.,Ltd,Shanghai 200011,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]上海装配式建筑技术集成工程技术研究中心,上海200011 [3]华东建筑设计研究院有限公司,上海200011

出　　处：《建筑结构学报》2018年第12期81-90,共10页Journal of Building Structures

基　　金：科技部土木工程国家重点实验室基础研究项目(SLDRCE14-B04);国际钢协LivingSteel宝钢钢结构住宅成套技术开发及建筑用钢产业链研究项目(D07EBEJ200)

摘　　要：为研究冷弯中厚壁矩形管冷弯效应对钢材屈服强度及其他力学性能的影响,对国内现有冷弯中厚壁矩形管的板件试样材性试验和短柱试验数据按照不同截面形式、钢材等级、厂家、厚度及成型方式等进行汇总与分析。提出了适合我国钢材特点与考虑冷弯效应的冷弯中厚壁矩形管屈服强度设计建议公式,将国内外相关规范的考虑冷弯效应的屈服强度计算公式和本文建议公式的计算结果与冷弯中厚壁方（矩）形管短柱试验数据进行对比分析,以验证本文建议公式的适用性。结果表明：按北美规范AISI S100-2007、欧洲规范EN 1993-1-3：2006和加拿大规范CAN3-S136-M84：1984得到的强度计算值相比于个别短柱试验值偏大,我国GB 50018—2002《冷弯薄壁型钢结构技术规范》中的屈服强度计算值相对于采用宝钢和Q345钢材的某些短柱试验值偏大。本文建议公式计算值相对于短柱试验值均偏小且安全,可作为冷弯中厚壁矩形管考虑冷弯效应的强度设计公式。In order to comprehensively study the impact of cold-forming effect on the yield strength and other mechanical properties, existing data of material property tests on steel plate specimens and short column tests on steel tube specimens is collected. The variables covered in the test database include the section form, steel grade, manufacturer, thickness and cold-forming method of steel tubes. A design formula for the yield strength of cold-formed rectangular steel tubes with medium thicknesses is proposed, which takes due consideration of the cold-forming effect and is suitable for the characteristics of steel in China. In order to verify the applicability of the proposed formula, comparisons between the yield strength calculated based on design standards from different countries, the proposed formula and results from stub column tests are carried out. The comparisons indicate that the North America code （ AISI S100-2007 ）, the Europe code （ EN 1993-1-3：2006） and Canada code （ CAN3-S136-M84 ： 1984） overestimate some of the test results for short column specimens. In addition, the yield strengths calculated based on the GB 50018--2002 ＇Technical code of cold-formed thin-walled steel structures＇ in China are greater than the test resuhs for some short column specimens with steels manufactured by Bao Steel and a steel grade of Q345. The calculated results of the proposed design formula are smaller than those of the short column test results. Therefore, the proposed formula can be recommended as the design formula for the yield strength of rectangular cold-formed steel tubes with medium-thick wail.

关 键 词：冷弯中厚壁矩形管 冷弯效应 设计建议公式 屈服强度 

分 类 号：TU392.302[建筑科学—结构工程]