[1]王卫锋,刘春燕,范学明..预应力混凝土连续刚构桥实测应变与应力的转换[J].郑州大学学报(工学版),2006,27(01):36-39.[doi:10.3969/j.issn.1671-6833.2006.01.009]
 WANG Weifeng,LIU Chunyan,Fan Xueming.Measured strain and stress conversion of prestressed concrete continuous rigid bridge[J].Journal of Zhengzhou University (Engineering Science),2006,27(01):36-39.[doi:10.3969/j.issn.1671-6833.2006.01.009]
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预应力混凝土连续刚构桥实测应变与应力的转换()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
27
期数:
2006年01期
页码:
36-39
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Measured strain and stress conversion of prestressed concrete continuous rigid bridge
作者:
王卫锋刘春燕范学明.
华南理工大学交通学院,广东,广州,510640, 广州大鹏房地产有限公司,广东,广州,510095, 华南理工大学建筑学院,广东,广州,510640
Author(s):
WANG Weifeng; LIU Chunyan; Fan Xueming
关键词:
应力应变转换 徐变系数识别 西江大桥 应力监测
Keywords:
DOI:
10.3969/j.issn.1671-6833.2006.01.009
文献标志码:
A
摘要:
混凝土实测应变除弹性应变外还包含混凝土的自由变形、徐变和温度应变等非应力应变,介绍了预应力混凝土连续刚构桥中应力间接测量的方法和步骤.在混凝土实测应变与应力的转换中,采用无应力计去除非应力应变,利用预埋在主梁中性轴的应变计进行混凝土徐变系数识别,并采用叠加法对徐变应变进行分离.混凝土内部应力测量关键在于应力应变转换,而应力应变转换关键在于徐变系数的识别.在西江大桥施工监控期间,先采用中性轴应力来识别徐变系数,再进行徐变应变分离的方法,应力实测值与弹性理论计算值比较接近.
Abstract:
In addition to elastic strain, the measured strain of concrete also includes non-stress strains such as free deformation, creep and temperature strain of concrete, and the methods and steps of indirect stress measurement in continuous rigid bridges of prestressed concrete are introduced. In the conversion of measured strain and stress in concrete, the non-stress gauge is used to remove the non-stress strain, the strain gauge embedded in the neutral axis of the main beam is used to identify the creep coefficient of concrete, and the creep strain is separated by the superposition method. The key to the internal stress measurement of concrete lies in the stress-strain conversion, and the key to stress-strain conversion lies in the identification of the creep coefficient. During the construction monitoring of Xijiang Bridge, the neutral axial stress was used to identify the creep coefficient, and then the creep-strain separation method was carried out, and the measured value of stress was close to the calculated value of elastic theory.

更新日期/Last Update: 1900-01-01