摘要
对3个尺寸为2640 mm×1560 mm 240 mm的砌体墙进行了水平地震作用力下的拟静力抗震性能试验研究。试件包括1个未加固砌体墙片作为对照组,两个分别采用双层单侧、四层单侧玄武岩纤维编织网(Basalt textile reinforced concrete,简称BTRC)加固的墙片。墙顶施加0.6 MPa的轴向荷载以模拟6层砌体结构底部承重墙承受的上部荷载,分别研究了结构破坏形态、滞回曲线、侧向承载力、刚度退化、耗能等抗震性能。结果表明,BTRC单侧加固可改变砌体墙的破坏形态并显著提高其侧向承载能力。其中,未加固试件在加载后呈现对角剪切斜裂缝穿过灰缝和砖块,墙体被分成几部分并丧失整体性,而BTRC单侧加固试件都是在墙脚第一皮砌块砖附近发生剪切滑移破坏。此外,BTRC加固层表面出现相对较细的裂缝,BTRC单侧加固可避免墙体的严重破坏。
The seismic behaviors of three masonry walls with dimensions of 2640 mm×1560 mm×240 mm were performed by pseudo-static tests.The specimens include an unreinforced masonry wall specimen as the control group,and two wall specimens reinforced by two-layer one-sided and four-layer one-sided basalt textile reinforced concrete(BTRC),respectively.An axial load of 0.6 MPa was applied on the top of the wall to simulate the upper load of the 6-story masonry structure.The seismic behaviors of the specimens,such as failure mode,hysteresis curve,lateral bearing capacity,stiffness degradation and energy dissipation,were studied respectively.The results show that the one side reinforcement of BTRC can change the failure mode of masonry wall and significantly improve its lateral bearing capacity.After loading,the unreinforced specimens showed diagonal shear and oblique cracks through the ash joint and brick,and the wall was divided into several parts and lost its integrity.However,the one side reinforced specimens of BTRC all suffered shear slip failure near the first brick at the wall foot.In addition,relatively fine cracks appear on the surface of the BTRC reinforcement layer,which shows one side BTRC reinforcement can avoid serious damage to the masonry walls.
作者
陈氏凤
王激扬
沈军
万成霖
胡兴荣
刘承斌
胡志华
CHEN Shifeng;WANG Jiyang;SHEN Jun;WAN Chenglin;HU Xingrong;LIU Chengbin;HU Zhihua(Zhejiang College of Construction,Hangzhou 311231,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Zhejiang Zhongxin Detection Co.,Ltd.,Quzhou 324000,China;Hangzhou Future SCI-TECH City Construction Co.,Ltd.,Hangzhou 311100,China)
出处
《混凝土》
CAS
北大核心
2022年第4期56-60,共5页
Concrete
基金
国家自然科学基金(51578495)
住房和城乡建设部科技项目(2019-K-041)
中国地震局重点实验室重点专项(2019EEEVL0302)。
