后张法悬臂浇筑预应力连续梁张拉伸长值计算与分析  

Calculation and Analysis of Tension Elongation of Cantilever Pouring Prestressed Continuous Beam with Post Tension Method

作　　者：郭迎宾 GUO Ying-bin(China Gezhouba Group No.5 Engincering Co.Ltd,Yichang 443002,China)

机构地区：[1]中国葛洲坝集团第五工程有限公司,湖北宜昌443002

出　　处：《工程建设与设计》2018年第16期98-99,共2页Construction & Design for Engineering

摘　　要：后张法预应力施工时,常采用张拉力与伸长量双控的方式控制预应力施工质量,要求达到设计控制应力时,伸长值偏差应在±6%范围内。论文结合项目实际施工过程中钢绞线伸长值的计算情况,总结了一套比较适合现场施工需要的伸长值的计算方法。In the prestressed construction of post-tensioning, we usually use the double-controlled way of tension and elongation to control the quality of prestressed construction. It requires that when the stress achieves to design control stress,the elongation deviation should be within ±6%. In this paper, combining with the construction of the elongation of steel strand in actual project construction,summarizes a set of elongation calculation method which is more suitable for the site construction needs.

关 键 词：连续梁 预应力 伸长值 

分 类 号：U442[建筑科学—桥梁与隧道工程]