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《Journal of Southeast University(Natural Science Edition)》 2010-S2
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Experimental study on seismic behaviour of masonry walls with window openings strengthened with sprayed GFRP

Gu Qian Jiang Hua Zhang Guanghai Peng Shaomin(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)  
Through the seismic experiments of three masonry wall specimens subjected to the horizontal cyclic loading combined with a constant gravity load,the seismic behaviours of unreinforced masonry walls with window openings strengthened with sprayed glass fibre reinforced polymer(GFRP) and epoxyed carbon fibre reinforced polymer(CFRP) sheets are investigated.The seismic strengthening effects by two different FRP retrofitting schemes are compared in terms of the failure modes,seismically shear capacity,hysteresis characteristic,deterioration of rigidity and energy dissipation ability of each specimens.The experimental results indicate that compared with the unstrengthened specimen,the ultimate capacity,the ductility factor and the energy dissipation coefficient of the specimen strengthened with sprayed GFRP are increased by 223.8%,125.4% and 5.6%,respectively;the increasing degree of shear capacity,the improvement of seismic behaviour and the guarantee of opening safety are significantly superior to that of the specimen strengthened with epoxy-based CFRP;and the overcoat of sprayed GFRP can bond tightly and work well together with the masonry,which can play a critical role in earthquake resistance.
【Fund】: 国家自然科学基金资助项目(50708084);; 湖北省自然科学基金重点资助项目(2008CDA043);; 教育部留学回国人员科研启动基金资助项目
【CateGory Index】: TU746.3
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