摘要:随着既有建筑总量的不断增多，既有结构的运营管理问题越来越突出。然而，在工程实践中，既有结构信息的集成是困扰其运营管理的一大难题。利用BIM技术及IFC标准，针对既有结构提出了一条集成鉴定与加固信息的途径。通过IFC标准中的属性集扩展的方法，在结构与构件层次集成基本的鉴定信息，同时参照5种常见的加固方法，在构件层次集成结构的加固信息。通过该方法集成的信息，能够在支持IFC文件的软件上读入，并在此基础上建立了既有结构维护管理系统。工程实例应用表明该系统有实用价值。

Abstract: With the growing amount of existing structures, it becomes a more obvious problem for the maintenance management of existing structures. However, in the engineering practice, integration of information for existing structures is a tricky problem in the maintenance management. By using the BIM technology and IFC standard, a practical way to integrate appraisal and strengthening information for existing structures is proposed. By means of extending property in IFC standard, the basic appraisal information in the levels of structural system and structural members can be integrated. And for the five common strengthening methods for reinforced concrete structural members, the strengthening information of members can also be integrated. The integrated information could be read by any piece of software that support IFC standard. Finally, a system for maintenance of existing structures is designed on the basis of the proposed model, and it has been validated to be applicable by a practical engineering practice.