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随着科学技术的进步和施工能力的提高,改建或加固将得到更多建设主管部门的青睐。目前对建筑物的加固有多种方法,其中对于钢筋混凝土结构或钢结构中某些构件,由于使用功能改变或设计标准提高、以及使用期间意外受损等种种原因,都会使结构在使用阶段承载力不足,安全性受到影响,因此经常要对这些结构进行加固来恢复或提高其工作性能。本论文用工程实例分析了因荷载增加造成结构部分损坏后,采用体外预应力对钢筋混凝土梁进行了主动加固的原理和方法,为今后分析类似问题提供了一定的帮助。
With the advancement of science and technology and improvement of construction capacity, reconstruction or reinforcement will be favored by more construction authorities. At present, there are many ways to reinforce a building. For some components in a reinforced concrete structure or a steel structure, the structure may be carried during the use stage due to various reasons such as functional changes or design standards being improved and accidental damage during use Insufficient force, safety is affected, so often to reinforce these structures to restore or improve their work performance. In this paper, the principle and method of using active prestressed reinforced concrete beams to reinforce the structure partially damaged by the increase of loads are analyzed with engineering examples, which will be helpful for the analysis of similar problems in the future.