某办公楼抽柱改造方案研究

Study on the transformation scheme of column removing in an office building

介绍某办公楼抽除顶层三个框架柱的结构改造方案。从结构受力状态、构件加固范围、施工便利性等方面,对比了增大混凝土梁截面、增设混凝土空腹桁架和增设钢桁架这三种方案,选择了最适合现场条件的利用建筑构架层高度设置跨层钢桁架的方案,不影响建筑室内空间,对原结构构件的加固范围最小,并可实现先加固改造后拆除柱,施工安全可靠。

This paper introduces the structural transformation scheme of an office building with three columns removed from the top floor.From the aspects of structural stress state,reinforcement scope of structural members and construction convenience,the paper compares the three schemes of increasing concrete beam section,adding concrete vierendeel truss and adding steel truss,and selects the scheme of setting cross floor steel truss,which is most suitable for site conditions,does not affect the indoor space of the building,and has the smallest reinforcement range for the original structural components,and the construction is safe and reliable.