摘要
采用国产的304牌号不锈钢,针对冷成型SHS、RHS和焊接工字钢截面,11种不同截面规格,共39根受弯构件,进行受弯构件试验研究。考察两端简支不锈钢梁在不同的加载方式和腹板约束条件下的极限承载力和破坏形式。通过试验发现:两端简支不锈钢冷成型SHS、RHS梁在集中荷载作用下根据加载方式和腹板约束条件的不同,主要有3种破坏形式,即整体弯曲破坏、腹板压屈破坏、两者耦合破坏。两端简支不锈钢焊接工字形梁在集中荷载作用下以发生弯扭失稳为主。在对两端简支不锈钢梁截面的抗弯强度、非线性挠度以及平面外稳定等受力性能分析的基础上,将试验结果与欧洲不锈钢设计规范(EN1993-1-4)和美国不锈钢设计规范(SEI/ASCE 8-02)进行对比分析。对比结果表明:试验得到的构件抗弯强度和平面外稳定承载能力均高于上述规范计算值,规范偏于保守;按上述规范计算得到的挠度小于试验值,规范偏于不安全。
Test investigation was performed on the stainless steel flexural members with sections consist of SHS, RHS and welding H section. The flexural members were made in austenitic stainless steel type 304. The test included 39 flexural members totally with 11 differernt size sections. The test demonstrated that the simply supported SHS and RHS beams mainly have three different failure modes with different constraint to web and different load methods： flexural failure, web crippling and the combination of flexural failure and web crippling. On the other hand, the beams with welding H-sections were liable to flexural-torsional buckling. Then the test results were compared to the results obtained by EN1993 -1 -4 and SEI/ASCE 8 -02 in the following aspects： the flexural capacity, the nonlinear deflection and the stability coefficient of the welding H-beam. These comparisons indicate that： test results of flexural strength and flexural-torsional buckling strength were higher than those predictions using above design codes; deflections predicted using above design codes were smaller than tests results.
出处
《工业建筑》
CSCD
北大核心
2012年第5期33-40,共8页
Industrial Construction
基金
江苏省自然科学基金资助项目(BK2009287)
国家自然科学基金资助项目(51178098)
关键词
不锈钢梁
受弯构件
强度
挠度
稳定
stainless steel beam
flexural member
strength
deflection
stability
