焊接工字形梁屈曲荷载的规范计算法

根据受弯构件的弯扭屈曲理论,介绍了不同国家<钢结构>设计规范对焊接工字形受弯构件屈曲荷载的计算,并和我国<钢结构>设计规范GB 50017-2003的计算进行比较,结果略有差别,说明我国规范临界弯矩最大值是以不超过边缘曲服为条件,而国外的临界弯矩最大值以截面部分曲服为条件,导致差别.这与我国钢材质量及安全性具有自己的特殊性有关,有待进一步研究钢材缺陷对钢结构设计的影响.

The normalized computing method for the welding I-shape beam exerted by a buckling load

This text is to show that different countries' design specification in "steel construction" helps compute the buckling load of the welding I-shape beam by the bucking theory on the curved components. And it also compares this way with the design specification GB 50017-2003 in our country. The slightly different comparing result proves that the norm of our country has its own particularity in this respect. The maximum value of critical bending moment can be fixed according to a condition of never exceed its yield limit at components' edges in our specification, and that the maximum value of critical bending moment can be fixed according to a condition of the part section yield in foreign specification, so it make for the difference. It relate to that the specification possess own particularity for the quality and security of steel products in our country, the effect of the defects of steel products with the design of steel structure need to be studied ulteriorly.