钢筋混凝土框架结构震后加固方案优选

The optimal method for scheme selection of reinforcement of reinforced concrete frame structures damaged by earthquakes

目前,绝大多数震损结构的震后加固依靠工程技术人员的主观经验,确定的加固方案难以综合考虑安全性、适用性、经济性、时间性和可行性等诸方面因素;并且加固方案主要针对各损伤构件提出,缺乏对加固后整体结构抗震性能恢复的评估。为解决这一问题,本文以钢筋混凝土框架结构为研究对象,提出了一种基于模糊决策理论和动态权重理论的结构震后加固方案优选方法。该方法中首先给出了适用于该问题的层次分析模型,随后明确给出了方案优选过程中涉及到的各类定性指标取值所针对的物理意义。通过该方法可以综合考虑时间、人员、材料供应、地震现场情况等多重因素影响,对多个加固方案进行比较优选,并有效减少决策时间和人为主观误差。文中最后以一栋实际震损的四层钢筋混凝土框架结构的加固方案优选为例,验证了所提出方法的有效性。

Until now, the method selection for reinforcement of buildings damaged by earthquakes mainly depends on personal experience of the engineers. The reinforcement scheme cannot consider multiple factors on safety, ap- plicability, economical efficiency, timeliness and feasibility comprehensively. Furthermore, the scheme is proposed based on performance recovery of the damaged components but not the whole structure. In order to solve these prob- lems, a method was proposed in this paper based on the theories of fuzzy decision and dynamic weights （ only for reinforced concrete frame structures now）. In this method, an appropriate analytic hierarchy model was given first. After that, physical meaning of the values of various quantitative indices that need to be considered during rein- forcement of buildings was defined. By this method, the comparison between multiple schemes can be preformed and the factors such as available time, professional ability of engineers, supply of materials and the situation of earthquake field can be considered. Also, the time in decision and subjective error from the engineers can be re- duced. Finally, to verify the feasibility of the method proposed in this paper, the method was applied on the scheme selection for a real damaged building （four -story reinforced concrete frame structure） in reinforcement of it.