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不锈钢材料在建筑结构中已得到广泛应用。为研究焊接不锈钢梁的整体稳定性能,进行了纯弯状态下的静力试验研究。试验包括10个试件,材料类型为奥氏体型316。截面类型采用了双轴对称和单轴对称工字形截面,试件的端部约束采用夹支,试验过程持续加载,直至达到试件的承载力峰值。基于试验结果,研究了焊接不锈钢梁的失稳破坏形态和极限承载力;对比了试验极限弯矩与理论弹性弯矩、塑性弯矩的差异,并将试验结果与有限元分析结果进行了对比。结果表明:试件的承载能力随着跨度的增大而减小,有限元分析能够准确预测试件的承载力,与试验结果吻合良好。
Stainless steel has been widely used in building structures. In order to study the overall stability of welded stainless steel beams, a static bending test was carried out. The test consisted of ten specimens of austenitic type 316. The cross-section type uses biaxial symmetry and uniaxial symmetrical I-shaped cross-section. The end restraint of the specimen adopts the clamp, and the loading process continues until the peak load-bearing capacity of the specimen is reached. Based on the experimental results, the failure modes and ultimate bearing capacity of welded stainless steel beams are studied. The differences between ultimate bending moment and theoretical elastic bending moment and plastic bending moment are compared. The experimental results are compared with the results of finite element analysis. The results show that the bearing capacity decreases with the increase of span, and the finite element analysis can accurately predict the bearing capacity of the specimen, which is in good agreement with the experimental results.