高延性混凝土面层加固受弯无筋砌体墙抗震性能试验研究  

EXPERIMENTAL INVESTIGATION ON THE SEISMIC BEHAVIOR OF FLEXURAL UNREINFORCED MASONRY WALLS STRENGTHENED BY HIGH DUCTILITY CONCRETE OVERLAYS

作　　者：邓明科[1] 董志芳 樊鑫淼[1,2] 梁兴文 DENG Ming-ke;DONG Zhi-fang;FAN Xin-miao;LIANG Xing-wen(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an,Shaanxi 710055,China;China Machinery International Engineering Design&Research Institute Co.,Ltd.,Changsha,Hunan 410007,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]中机国际工程设计研究院有限责任公司,湖南长沙410007

出　　处：《工程力学》2020年第3期46-55,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(51578445)。

摘　　要：为研究高延性混凝土(HDC)加固无筋受弯砌体墙的抗震性能,设计了1片未加固砖墙、1片钢筋网水泥砂浆面层加固砖墙和3片HDC面层加固砖墙进行拟静力试验,研究其破坏机理、滞回特性和耗能能力。结果表明:1)HDC面层和砖墙具有良好的粘结性能,可有效抑制墙体的开裂和破坏,能改善墙体的脆性破坏特征;2)HDC面层对砖墙形成良好的约束作用,提高了墙体的抗震承载力;3)HDC面层可显著提高砖墙的变形和耐损伤能力,减小或免去震后修复费用,其加固效果优于传统的钢筋网水泥砂浆面层。根据统计分析,该文给出了HDC面层加固墙体基于位移角的易损性曲线。To study the seismic behavior of flexural unreinforced masonry walls strengthened with High Ductility Concrete(HDC)overlays,an unreinforced brick wall,a wall retrofitted with steel-meshed cement mortar and three walls strengthened with HDC overlays were designed.Quasi-static tests were performed to study the failure mechanism,hysteretic characteristics and energy dissipation capacity of the brick walls.The results shows that:the bonding properties between the HDC overlays and brick walls are excellent,and the HDC overlay is effective to limit the crack and damage and avoid brittle failure;the HDC overlay has good restraining effect on the brick walls and improves the seismic performance of the brick walls;the HDC overlay can significantly improve the damage tolerance and deformability and reduce or avoid the repair expenses after earthquakes.Its effectiveness is better than a traditional steel-meshed.According to the statistical analysis,this paper gives the fragility curve based on the drift of walls strengthened by HDC layers.

关 键 词：无筋砌体 受弯砌体 高延性混凝土(HDC) 抗震加固 性能指标 

分 类 号：TU362[建筑科学—结构工程] TU317