喷射型ECC加固砌体墙抗震性能试验研究  

Experimental study on seismic performance of masonry wall strengthened with sprayed ECC

作　　者：李晓琴[1] 黎可然 张田 许蔚[1] 梁丽敏 LI Xiaoqin;LI Keran;ZHANG Tian;XU Wei;LIANG Limin(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;Institute of Subsurface Energy Systems,Clausthal University of Technology,Clausthal-Zellerfeld 38678,Germany;Yunnan Construction Investment Holding Green and High-Performance Concrete Co.,Ltd.,Kunming 650501,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]克劳斯塔尔工业大学地下能源系统研究所,克劳斯塔尔-采勒费尔德38678 [3]云南建投绿色高性能混凝土股份有限公司,昆明650501

出　　处：《振动与冲击》2025年第8期251-258,296,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(52168029);云南省兴滇英才计划青年拔尖人才项目(云人社通[2020]150号YNWR-QNBJ-2020-049)。

摘　　要：纤维增强工程水泥基复合材料(engineered cementitious composites,ECC)具有应变硬化、多缝开裂等特点,被广泛应用于工程加固。而现有ECC加固应用研究主要局限于人工涂抹,加固效率偏低,针对大量亟需加固的农村砌体结构,研究提出喷射型ECC高效率加固砖墙的方法,对4片砌体墙进行了拟静力试验,对比分析了未加固墙体、喷射型ECC加固墙体与人工涂抹ECC加固墙体的抗震性能。结果表明:喷射型ECC加固效率为人工涂抹的5.27倍,ECC面层与墙体表面黏结性能良好,对墙体形成了有效约束,改善了砌体墙的非延性破坏特征;同时,喷射型ECC与人工涂抹加固效果相当,可以有效提高墙体的承载能力、变形能力以及耗能能力,提升墙体综合抗震性能。Engineered cementitious composites(ECC)are widely used in structural strengthening due to the characteristics of strain hardening and multiple cracking.However,existing research on ECC strengthening is mainly manually applied,which is with low retrofitting efficiency.For strengthening a large number of rural masonry structures,the sprayed ECC retrofitting method was investigated.Pseudo-static tests were conducted on four un-strengthened and strengthened masonry walls,of traditionally manually applied and the new sprayed ECC.The results indicate that the strengthening efficiency of sprayed ECC is 5.27 times that of the manual application.The ECC strengthening layers are with good adhesion performance to the wall surface,providing effective strengthening effects and improving the non-ductile failure characteristics of the masonry wall.Meanwhile,the strengthening effect of sprayed ECC is comparable to that of manual plastering,which can effectively enhance the masonry wall’s bearing,deformation and energy dissipation capacities and enhance the comprehensive seismic performance of the masonry wall.

关 键 词：喷射型工程水泥基复合材料(ECC) 砌体墙 加固 抗震性能 

分 类 号：TU362[建筑科学—结构工程]