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《Journal of Engineering Geology》 2012-05
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PHYSICAL MODELLING OF TIME DEPENDENT PULLOUT BEHAVIOR ASSOCIATED WITH GFRP ANCHOR

ZHU Honghu ZHANG Chengcheng SHI Bin ZHOU You ZHANG Daijun(School of Earth Sciences and Engineering,Nanjing University,Nanjing210093)  
The GFRP anchors have advantages over the steel anchors in terms of better corrosion resistance,higher strength-to-weight ratio and so forth,in recent years,they have been gradually utilized to stabilize slopes and other geo-structures.However,stability condition of these geo-structures may be significantly affected by the time-dependent mechanical characteristics of GFRP anchors.According to the pullout mechanism of GFRP anchors,a visco-elastic model which is based on the Merchant rheological model,is proposed to describe the time dependent pullout behavior of GFRP anchors.The finite difference method is used to solve the third-order partial governing equation derived from the proposed model.The distributions of tensile force,shear stress,and displacement and their variations with time are calculated.Furthermore,a parametric study is conducted to study the influence of model parameters on the time-dependent pullout behavior of GFRP anchors.Conclusions relevant to the reinforcement mechanism of GFRP anchor are drawn subsequently.
【Fund】: 国家重点基础研究发展计划(973计划)课题(2011CB710605);; 中央高校基本科研业务费资助项目(1092020603);; 江苏省高等学校大学生实践创新训练计划项目(XZ1110284066)
【CateGory Index】: TD353.6
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