摘要
为改善混凝土空心砌块墙体的脆性破坏模式,提高墙体的抗震性能,提出采用高延性混凝土(HDC)加固混凝土空心砌块砌体墙.设计了3片无构造柱与3片带构造柱的砌块砌体墙,分别对这两类墙体采用单面HDC及双面HDC面层进行加固,通过拟静力试验,研究墙体的破坏形态、滞回性能、承载力及变形能力,为此类结构的加固设计提供试验及理论依据.试验结果表明:对于无构造柱墙体,HDC面层可有效限制墙体斜裂缝的开展,改善墙体的脆性破坏模式,提高墙体的承载力与变形能力;对于带构造柱墙体,HDC面层提高了试件的水平承载力,加固试件的残余承载力较高,内部墙体的损伤程度较小.通过理论分析,建立了各试件的受剪承载力计算公式,且计算结果与试验值吻合较好,可为HDC加固混凝土空心砌块墙体的抗剪承载力计算提供参考.
To improve the ductile failure mode and seismic performance of concrete hollow block masonry walls,this study proposes techniques for strengthening these walls with high ductile concrete(HDC).Three unreinforced masonry walls(URM)and three confined walls were built,and then both types were strengthened using single-sided and double-sided HDC layers,respectively.Based on the cyclic loading tests,the failure mode,hysteretic behavior,shear strength and deformation capacity were studied to provide a theoretical basis for the design of such structural members.For the URM walls,HDC layer effectively restricted the development of diagonal cracks,improved the ductile failure mode of wall and increased the shear resistance and deformation capacity.For the confined masonry walls,the strengthened specimens had higher bearing capacity and residual strength,and the damage of the internal masonry walls was slighter.Based on relevant theory analysis,the formulas,for the shear capacity of tested specimens,were proposed.The calculated results matched well with the tested results.Therefore,it can be a reference for the calcula tion of the shear strength of the strengthened concrete block masonry walls.
作者
邓明科
张伟
李宁
DENG Mingke;ZHANG Wei;LI Ning(School of Civil Engineering,Xi'an University of Architecture&Technology,Xi'an 710055,China;Hualu Engineering&Technology Co Ltd,Xi'an 710065,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第9期85-93,共9页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51878545)
住房和城乡建设部项目(2019-K-043)。
关键词
高延性混凝土
混凝土空心砌块砌体
加固
抗震性能
承载力
high ductile concrete(HDC)
concrete hollow block masonry
strengthened
seismic performance
shear strength
