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（1 武漢大學(xué)土木工程學(xué)院  430072；2 湖北工業(yè)大學(xué)  武漢 430068）
【提要】  借助足尺模型試驗(yàn)，測(cè)定了三種形式的預(yù)應(yīng)力筋張拉過(guò)程中的孔道摩阻損失。試驗(yàn)結(jié)果表明，直線型和小曲率預(yù)應(yīng)力筋孔道的摩阻損失較小，而大曲率情況的孔道摩阻損失超過(guò)30%。引入非線性摩擦的概念，建立了預(yù)應(yīng)力摩阻損失模型，并將模型計(jì)算結(jié)果與試驗(yàn)結(jié)果進(jìn)行
比較，摩擦模量取10～11N/mm時(shí)二者符合較好。
【關(guān)鍵詞】  大曲率預(yù)應(yīng)力筋  孔道摩阻損失  模型試驗(yàn)
Study on Hole Friction Loss of Large Curvature Prestressed Reinforcement/Chen Yueshun 1，2，Liu Li2（1 School of Civil Engineering，Wuhan University，Wuhan 430072，China；2 Hubei University of Technology，Wuhan 430068，China）
Abstract:By means of full size model test，the hole friction loss of three kinds of prestressed reinforcements have been measured，which be little for the linear and the small curvature prestressed reinforcements，on the contrary its excess 30% for large curvatures. The conception of nonlinear friction has been imported，and then the prestressed friction loss model has been constituted. The results of model forecasting and the testing have been compared，which be accord well when friction modulus be taken to 10～11.
Keywords:large curvature prestressed reinforcement；friction loss of hole；model test
*湖北省自然科學(xué)基金和武漢市青年科技晨光計(jì)劃支持項(xiàng)目。