哈尔滨南岗会堂增层改造设计

Structure design for adding storeys of Harbin nangang hall

为解决增层改造施工过程影响既有建筑正常使用的问题,结合哈尔滨南岗会堂增层改造工程,研究了既有房屋套建巨型框架增层的设计方法与施工措施.巨型框架选用悬挂结构体系,次框架的竖向荷载通过吊柱传至主框架.主框架由内置H型钢预应力混凝土组合梁和角钢混凝土柱组成,次框架由型钢混凝土梁和型钢混凝土柱组成,施工阶段采用自承重现浇混凝土结构体系,实现既有建筑在施工过程中的正常使用.

To solve the problem of that the construction process for original buildings story-adding prevents its usual work,taking Harbin Nangang Hall as demonstration,the adding project of huge frame including main frame around old buildings and sub frame is studied.The vertical load is transmitted from sub frame to main frame by the davit.The main frame is composed by prestressed concrete beams with encased H-steel and angle-steel concrete columns,and the sub frame is composed by encased steel beams hanging and encased steel columns over the huge frame.Design and construction methods of self-supporting concrete structure are presented to ensure that original building works as usual during the construction.