某景观廊道钢结构细长柱设计研究

Research on Design of Slender Steel-structured Column in a Landscape Corridor

某钢结构景观廊道屋面悬挑跨度过大,造成悬挑钢梁根部应力比超限,为此在廊道远离悬挑根部支座一侧的局部区域增设若干钢结构细长柱,藏于建筑装饰柱中,协助承担悬挑屋盖的荷载,既解决了悬挑梁应力比超限的问题,又达到了预期的建筑效果。该文借助该项目细长柱的设计,探讨钢结构细长框架柱和钢结构细长摇摆柱这两种形式分别在项目中的应用情形,厘清新版《钢结构设计标准》(GB 50017—2017)关于框架柱性能化设计的相关思路,并给出细长框架柱和细长摇摆柱的不同应用场景建议。

The overhanging span of a landscape corridor's steel cantilever beam is too large,causing the stress ratio of the steel cantilever beam bottom to exceed the limit.Therefore,some slender steel-structured columns are added to the local area on the side of the corridor away from the cantilevered root support,which are hidden in the decorative columns and are used to carry the load of cantilevered roofs,not only solving the problem of stress ratio exceeding the limit of the cantilever beam,but also achieving the expected construction effect.Based on the design of slender steel-structured columns of this project,the application of the two forms of slender steel-structured frame column and slender steel-structured swing column in this project was discussed,and relevant thoughts on the performance-based design of frame columns in the new edition of Code for Design of Steel Structures(GB50017—2017)were clarified,with suggestions for different application scenarios of the two forms of columns.