宜宾长江大桥主梁施工应力测试与分析  

Testing and Analysis of Concrete Stress in Construction of Main Girder of Yibin Changjiang River Bridge

作　　者：刘扬[1] 涂荣辉[2] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410008 [2]长沙理工大学桥梁与结构工程学院,湖南长沙410076

出　　处：《桥梁建设》2008年第2期71-73,77,共4页Bridge Construction

基　　金：国家自然科学基金项目(50608009);交通部应用基础研究项目(2006319825070)

摘　　要：混凝土实测应变包含弹性应变、徐变应变及混凝土自由变形、温度应变等非应力应变。探讨了无应力应变、徐变应变以及混凝土水化热影响的剔除办法,提出用测试应变增量来反映应力的处理方法,并将该方法应用于宜宾长江大桥工程实例,结果表明应力实测值与理论计算值吻合较好。The measured strain of concrete includes the the non-stress strain like the concrete free deformation and t way to reject the influences of the non-stress strain, creep studied, a method of the tested strain increment is proposed pie of application of the method to the actual bridge of Yib .＇ elastic strain, creep strain and also emperature strain. In this paper, the stain and concrete hydration heat is for representing stress and an examin Changjiang River Bridge is given.The results of application of the method indicate that the measured values of the stress agree fairly well with the values of the theoretic calculation.

关 键 词：预应力混凝土桥 斜拉桥 施工阶段 非应力应变 徐变应变 水化热 

分 类 号：U441.5[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]