纤维编织网增强混凝土加固砌体墙抗震性能试验研究

Experimental study on seismic performance of masonry walls strengthened with textile-reinforced concrete

纤维编织网增强混凝土(textile-reinforced concrete,TRC)由于具有良好的限裂能力和耐腐蚀性,且使用水泥基材料作为基体,与砌体墙具有良好的黏结能力和协同受力性能,可用于砌体墙加固。为了研究TRC对砌体墙的抗震加固效果,通过4片墙体的低周反复荷载试验,对比分析单双面碳纤维网TRC和双面玄武岩纤维网TRC加固砌体墙的抗震性能。研究表明:采用TRC加固后可以使得墙体从未加固时的脆性剪切破坏转变为延性较好的剪切破坏和弯剪破坏;TRC加固可以有效提高墙体的承载能力、变形能力、刚度、延性以及耗能能力;相较于未加固试件,双面碳纤维网TRC加固墙体的延性和耗能能力提高幅度最大,分别提高了50.60%和211.95%;单面碳纤维网TRC加固墙体的抗震性能低于双面碳纤维网TRC加固墙体的,玄武岩纤维网TRC加固墙体的抗震性能低于碳纤维网TRC加固墙体的。

Textile reinforced concrete(TRC)can be used for the reinforcement of masonry walls due to its excellent crack limiting ability and corrosion resistance,as well as its excellent adhesion and synergistic stress performance with masonry walls with using cement-based materials as a matrix.In order to study the seismic strengthening effect of TRC on masonry walls,the seismic performance of masonry walls strengthened with single and double-sided carbon fiber mesh TRC and double-sided basalt fiber mesh TRC was compared and analyzed through low cyclic loading tests on four walls.Research has shown that the use of TRC reinforcement can transform from the brittle shear failure of unreinforced walls to ductile shear failure and flexural shear failure.TRC reinforcement can effectively improve the bearing capacity,deformation capacity,stiffness,ductility,and energy dissipation capacity of walls.Compared to the unreinforced specimen,the ductility and energy dissipation capacity of the specimen strengthened with double-sided carbon fiber mesh TRC have the greatest improvement,increasing by 50.60%and 211.95%,respectively.The seismic performance of single-sided carbon fiber mesh TRC reinforced specimen is lower than that of double-sided carbon fiber mesh TRC reinforced specimen,and the seismic performance of basalt fiber mesh TRC reinforced specimen is lower than that of carbon fiber mesh TRC reinforced specimen.