填充墙RC框架结构加固方法的研究现状及展望

A review of the methods of strengthening RC frames with masonry infilled wall structures

综述了用于提高填充墙钢筋混凝土(RC)框架结构抗震性能和改善结构损伤模式的几类加固措施,从工艺、加固效果和破坏形式3个角度进行了分析。在建筑结构设计过程中,填充墙通常被视为一种典型的脆性非均质非结构构件,忽视了填充墙与RC框架之间的相互作用。地震调查报告表明,在结构遭受地震作用时,填充墙通常先于钢筋混凝土框架发生破坏,未经合理设计的填充墙RC框架结构将在地震作用下产生严重不良后果。试验结果和数值模拟分析结果证明,砌块的强度越低、砂浆的强度越高,结构的承载能力和刚度退化越慢、耗能能力越好。文中根据目前已有的建筑材料改性试验结果,从改性机理出发,分析了一系列有利于提高结构抗震性能的新型材料,并对结构的设计方案进行了探讨。

This paper reviews several kinds of strengthening methods to improve the seismic performance and modify the structural damage mode of infilled reinforced concrete(RC)frame structure,and analyze different reinforcement methods from three perspectives:the strengthening technology,strengthening effect and damage form.In the process of building structure design,a masonry wall is usually regarded as a typical brittle and heterogeneous component,the interaction between masonry wall and RC frame is not taken into consideration.Many studies about earthquakes show that the masonry wall is more likely to be destroyed before RC frame structures,unreasonably designed infilled RC frame structures may lead to adverse consequences.The results of tests and numerical simulation show that using lower strength brick or higher strength mortar can slow the structure’s bearing capacity and stiffness degradation,and the energy dissipation capacity of the structure can improve.This review paper also analyzes a series of new construction materials that can improve the seismic capability of an infilled RC frame structure from the perspective of modification mechanism,and the design method for filling walls is discussed.