水泥砂浆面层加固砖砌体抗震性能研究

STUDY ON SEISMIC BEHAVIOR OF BRICK MASONRY STRENGTHENED WITH CEMENT MORTAR

目前,大部分农村居住房采用的是砌体结构房屋,大多都是自建房,缺乏正规设计和施工,安全性和抗震性普遍较差。文中以淮南桂集镇某2层砖混砌体结构自建房屋为例,参照相关规范,利用现场检测数据,通过PKPM分析结构的抗震性能是否符合规范要求,并以水泥砂浆面层厚度、原砌体砂浆强度等级、单双层加固以及原墙体厚度等为变化因素,通过增强系数来分析水泥砂浆加固对砖砌体抗震性能的影响,发现增强系数与砌筑砂浆强度等级呈反比关系,与砂浆面层厚度呈正比关系,当砂浆强度小于M1时,加强效果更好。这项研究可为相关砌体结构加固提供一定理论经验,对后续加固处理起到指导意义。

At present,most of the houses in rural areas are masonry structure houses,most are self-built houses,lacking of formal design and construction,whose safety and seismic performance is generally poor.Taking a self-built two-story brick masonry building in Guiji town of Huainan as the case,this paper analyzes the seismic per⁃formance of the building by PKPM according to relevant codes and on-site test data.Taking the thickness of cement mortar surface layer,the strength grade of original masonry mortar,the reinforcement of single and double layers,and the thickness of original wall as the changing factors,the influence of cement mortar reinforcement on the seis⁃mic performance of brick masonry is analyzed through the enhancement coefficient,it is found that the strength coef⁃ficient has an inverse relationship with the strength grade of the masonry mortar and a direct relationship with the thickness of the mortar surface.The study may provide theoretical experience for the related masonry structure rein⁃forcement and guide the subsequent reinforcement treatment.