空间曲线预应力束摩阻损失参数.pdfVIP

第21 卷　第3 期 西 安公路交通大学学报 Vol. 21　No. 3 2001 年7 月 Journal of Xi′an Highway University July 2001 : 1007-4112( 2001) 03-0042-03 1 2 2 2 刘志文, 宋一凡, 赵小星, 贺拴海 ( 1. , 2000 2; 2. , 710064) : 针对空 曲线预应力束摩阻损失较大的情况, 结合某座立交工程中的曲线梁桥的预应力摩 阻损失测试, 利用最小二乘原理得出了预应力摩阻损失参数L、k , 为施工提供依据, 亦可为其它曲 线预应力束的预应力损失计算提供一定的参考。 : 空 曲线; 预应力束; 摩阻损失; 参数L、k; 最小二乘原理 : U448. 21: A The Parameters Lk for Describing the Attrition Loss of Prestress Tightwire with Space Curve 1 2 2 2 L I U Zhi-w en , S ON G Yi-f an , ZH A O X iao-x ing , H E S huang -hai ( 1. Department of Bridge Engineering, T ongji University, Shanghai 2000 2, China; 2. School of Highw ay , Chang an Universit y, Xian 710064, China) : Abstract T he attrition loss of prestress tightw ire w ith space curve used in cuve girder bridge is more bigger than the one of beeline tightw ire. T aking a curve girder bridge at a crossroad as an example, and using the least square method, the parameters Lk for describing the attrition loss . Lk w as calculated T he results show that the parameters can provide a reference for the con- struction of curve girder bridge and for the calculation of other curve prestress bridges attrition loss of prestress. Key words: space curve; prestress tightw ire; attrition loss for prestress; parameters Lk; least square method 1 , , , , [ 1] ,