Taking a comprehensive office building as an example,according to the structure reinforcement design principle,this paper researched the strengthening and extending reconstruction design scheme of reinforced concrete frame structure,and analyzed the characteristics and specific construction requirements of foundation reinforcement,frame column reinforcement,beam and slab reinforcement,shear wall reinforcement and other reinforcement methods,in order to achieve good reinforcement effect.%以某综合办公楼为例，根据结构加固设计原则，对钢筋混凝土框架结构的加层加固改造设计方案进行了研究，并分析了基础加固、框架柱加固、梁板加固、剪力墙加固等加固方法的特点及具体构造要求，以达到良好的加固效果。
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