结构工程师2011，Vol.27Issue(z1)：113-116,4.
基于光纤Bragg光栅的预应力损失监测技术研究
Application and Analysis of Flexure-Shear Failure of Underpinning Joints of RC Columns
张际斌 1宋正峰 1高娟2
作者信息
- 1. 中冶建筑研究总院有限公司建筑工程检测中心,北京100088
- 2. 北京工商大学嘉华学院,北京101118
- 折叠
摘要
Abstract
Underpinning joints of RC columns bear complicated flexure-shear effect in shift engineering. The loading process was divided into pre-cracking and post-cracking segments of new to old concrete interface. The mechanical properties of the interface in different stages under flexure-shear were analyzed based on the plane section assumption by using formula of adhesive strength behavior of new and old concrete. The analysis was compared with test results. According to the comparison, it was found that the mechanical properties are closely related with concrete strength grade of the column, the support span, and the sectional characteristic. Also, the design method of bearing capacity of the new to old concrete interface of underpinning joints considering different loading stages is more pertinent and reasonable than traditional design method in practical projects.关键词
预应力损失/光纤Bragg光栅/钢绞线/全时程全长/监测Key words
shift engineering/ underpinning joint/ flexure-shear effect/ plane section assumption/ adherence of new to old concrete引用本文复制引用
张际斌,宋正峰,高娟..基于光纤Bragg光栅的预应力损失监测技术研究[J].结构工程师,2011,27(z1):113-116,4.
