摘要
利用数值模拟方法研究低强度砂浆强震损伤砖墙采用钢筋网砂浆面层加固的适宜性及加固后抗震性能。依据砖墙承载力损失程度划分损伤等级,对砖墙模型施加作用形成预损伤,对加固墙体模型完全重启动实现砖墙应力初始化,然后对加固试件施加低周往复荷载,得到损伤加固试件破坏特征及荷载-位移滞回曲线,并与原砖墙模型进行比较,验证加固方法的适宜性和增强效果。研究结果表明:本研究数值方法获得的损伤砖墙采用单面、双面钢筋网砂浆面层加固后的力学性能结果真实可靠,可作为钢筋网砂浆面层加固震损砖墙抗震性能评估的依据。
The suitability and seismic performance of retrofitted damaged brick walls with low strength mortar under strong earthquake were studied by numerical simulation.The brick wall damage degree is divided by the reduction level of the bearing capacity.External loads were then applied to the brick wall models to formulate the divided damage degree.Full restart analyses were conducted to achieve the brick wall stress initialization.Low cycle reciprocating loads were then applied to the retrofitted specimen.The failure characteristics and the load-displacement hysteresis curves of the retrofitted specimen were acquired and compared with those of the original brick walls to validate the suitability and effectiveness of the retrofitting method.Results show that the mechanical properties of the damaged brick walls retrofitted by single or double sides external steel meshed mortar layers obtained by numerical method in this study are reasonable and reliable,and can be used as the basis for the seismic performance assessment of earthquake-damaged brick walls retrofitted by external steel meshed mortar layers.
作者
吴碧野
戴君武
柏文
WU Biye;DAI Junwu;BAI Wen(Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin 150080, China)
出处
《地震工程与工程振动》
CSCD
北大核心
2021年第5期79-89,共11页
Earthquake Engineering and Engineering Dynamics
基金
国家重点研发计划重点专项(2018YFC1504404)。
关键词
损伤墙体
抗震性能评估
砂浆面层
应力滞后效应
damaged wall
seismic performance assessment
external steel meshed mortar layer
stress hysteresis effects
