某工业厂房的加层改造设计

因使用功能发生改变,某5层框剪结构工业厂房,需要加层改造为9层框剪结构的高档写字楼。对原有房屋进行现场检测和抗震鉴定,结果显示房屋基本符合我国现行各项规范要求。基于结构原有大跨度预应力梁截面过高等实际情况,制定该房屋的室内加层改造设计方案,提出采用两种桩基础进行基础加固、扩大截面法和黏贴碳纤维布补强原有框架柱的加固措施,对加层改造后的结构进行抗震验算分析,施工时采取沉降观测,改造效果良好。

INSERTING LAYERS RECONSTRUCTION DESIGN FOR AN INDUSTRIAL WORKSHOP

Because of the change of functions,a five-story frame-shear wall industrial workshop was reconstructed to a nine-story frame structure building used as top quality office building. The field inspection and seismic appraisal of the original building were conducted,the results showed that the building could meet various requirements of the present Chinese code basically. Based on the actual situation,like original large-span prestressed beam section was too high, the indoor retrofitting design program was made. Strengthening designs were proposed, including strengthening its base with two kinds of pile foundations,enlarging cross-section of original frame column and sticking CFRP laminates. Structure after adding layers was analyzed,settlement monitoring during the transformation process was carried out,and the retrofitting effect was excellent.