水道港口2011，Vol.32Issue(3)：207-212,6.
钻孔法检测在役混凝土梁残余预应力技术研究
Residual prestressing detection technology of in-service concrete beams by hole-drilling method
田双珠 1邓雷飞 2郭畅1
作者信息
- 1. 交通运输部天津水运工程科学研究所水工构造物检测、诊断与加固技术交通行业重点实验室,天津,300456
- 2. 长沙理工大学水利工程学院,长沙,410076
- 折叠
摘要
Abstract
In order to ensure the wharf operational security, the concrete strain at the bottom measuring point of the in-service prestressed concrete beam was measured by hole-drilling method.The extant stress at beam bottom was calculated according to the physical relations.So the strain was gathered during detection when the stickup angles of strain gauge changed.Through correcting factors,the extant stress at beam bottom and the average value were computed.The finite element model considering the reinforcement stress output and the concretes compressive stress was established.Based on the analysis result,the relationship between the reinforcement stress and the concretes compressive stress at beam bottom center was built by the linear regression method.Therefore,the residual stress of in-service prestressed concrete beam was calculated.The comparison between the measurement result and the result calculated according to code shows that the measurement result has better applicability and practicability.关键词
钻孔法/有限元/残余预应力Key words
hole-drilling method/ finite element/ residual prestressing分类
建筑与水利引用本文复制引用
田双珠,邓雷飞,郭畅..钻孔法检测在役混凝土梁残余预应力技术研究[J].水道港口,2011,32(3):207-212,6.
