摘要
宿淮高速公路五河口斜拉桥工程,进行了索塔足尺模型试验。针对环向预应力筋张拉伸长值比理论伸长值偏大这一现象,对环向预应力筋的张拉控制进行了研究,测试了6束预应力筋的摩阻系数。同时,还对初始张拉控制应力进行了试验分析,提出了相应的张拉控制程序。最后,对索塔锚固区共290束环向预应力筋实测张拉伸长值结果进行了概率统计分析,证实了理论伸长值修正算法中各项修正的必要性。
Aimed at the phenomenon of the deviation of measured elongation ann calculated,one the test and study on tension control of ring tendons with small curvature are carried out in this paper combined with Wuhekou Cable-stayed Bridge. The friction coefficients of six tendons are tested. At the same time, the test of the initial stress for tension control is analyzed and the corresponding procedure for tension control is Presented. Finally, the statistic analysis of 290 measured corresngationsis constructed, which confirms the necessity of several modified items in the calculation method of elongation for small curvature tendons.
出处
《公路》
北大核心
2006年第5期7-10,共4页
Highway
关键词
斜拉桥
环向预应力筋
伸长值
摩阻系数
cable-stayed bridge
ring tendons
elongation
friction coefficient
