摘要
大跨度混凝土连续刚构桥中的预应力损失将会严重危害其耐久性。针对实桥中空间长预应力束张拉时其摩阻损失较大的情况,对预应力长束的摩阻参数测试方法进行了探讨,并在广明高速公路某特大桥现场实施了预应力摩阻参数测试。研究结果表明,其测试及分析方法可有效地测定大跨度混凝土桥梁预应力体系的摩阻参数μ和k。
The durability of long-span continuous concrete rigid frame bridge can be damaged by prestress loss seriously.In this paper,it will focus on the testing methods of attrition parameters based on the condition that the bridges＇ long prestress tightwire is under big attrition loss.Moreover,the prestress attrition parameter test is carried out in Guangming Expressway in the field of study.The results show that the method can be used to determine the attrition parameter μ and k of long-span concrete rigid frame bridge effectively.
出处
《公路工程》
2011年第1期25-27,58,共4页
Highway Engineering
基金
广东省交通厅科技计划项目(2007-16)
关键词
长预应力束
测试方法
摩阻损失
摩阻参数
long prestress tightwire
testing method
attrition loss
attrition parameter
