薄壁截面杆件的自由扭转变形能力比较

The Comparison of Torsional Deformation Capacity for Thin-walled Bar with Unrestrained Torsion

近些年建筑行业对薄壁杆件的应用在迅猛增加,冷弯形成的各种杆件以及焊接、热轧薄壁杆件在钢结构中比比皆是。本文进行对比研究相同材料用量下工字形、T形开口薄壁截面杆和圆形、箱型、三角形闭口薄壁截面杆在自由扭转时的变形能力,分析了相同材料用量下工字形、箱形和三角形薄壁截面杆高宽比对截面扭转变形能力的影响。

In recent years, the application of thin - walled bars in the construction industry, such as the formation of a variety of cold bending, welding and hot rolled thin - walled bars in the steel structure, can be found everywhere. Torsional deformation capacity is studied comparatively under unrestrained torsion for I -shaped, T- shaped opening thin- walled section and circular, box, triangle closed thin- walled section with the same material consumption. And the influence of height - to - breadth ratio is analyzed for torsional deformation capacity.