Research on Whole-Hole Testing Technology for Under-Anchor Tension in Prestressed Concrete Girders

Authors

ZHU Jianzhao, Ningbo Traffic Construction Engineering Test and Testing Center Co ., Ltd., Ningbo, Zhejiang 315100, ChinaFollow
DONG Hao, School of Civil Engineering, Ningbo Tech University, Ningbo, Zhejiang 315100, China
GU Jungang, Ningbo Traffic Construction Engineering Test and Testing Center Co ., Ltd., Ningbo, Zhejiang 315100, China
FENG Lu, Zhejiang Provincial Traffic Engineering Management Center, Hangzhou, Zhejiang 310011, China
LI Shuyang, Zhejiang Provincial Traffic Engineering Management Center, Hangzhou, Zhejiang 310011, China
ZHANG Shoulong, Ningbo Traffic Construction Engineering Test and Testing Center Co ., Ltd., Ningbo, Zhejiang 315100, China
CHEN Chaung, School of Civil Engineering, Ningbo Tech University, Ningbo, Zhejiang 315100, ChinaFollow

Corresponding Author

陈闯, 男, 博士, 副教授. E-mail: chenchuang@nit.zju.edu.cn

Abstract

This study aims to propose a new testing method,namely whole-hole back-pull testing technology,to reduce costs and increase efficiency in under-anchor tension testing,effectively addressing the engineering challenges of large testing volume and tight schedules.Based on the principle of the traditional back-pull method,the mechanism of whole-hole back-pull testing technology was explained through theoretical analysis and formula derivation.Technical optimization was carried out in conjunction with experimental research,and a complete application method was proposed.A feasibility analysis was carried out.The study obtained the simplified mechanical model and typical test curves of the whole-hole back-pull testing technology and proposed a formula and application method for determining the under-anchor tension according to the regularity of the test curves.Test results show that this technique has a testing deviation rate within 10%,and the impact of the testing operation on the existing under-anchor tension is about 1%,demonstrating its feasibility.However,there remains room for improvement,particularly in terms of testing equipment and environmental factors,to further enhance testing accuracy and support broader application in engineering practice.

Publication Date

12-24-2025

DOI

10.14048/j.issn.1671-2579.2025.06.023

First Page

199

Last Page

208

Submission Date

December 2025

Recommended Citation

Jianzhao, ZHU; Hao, DONG; Jungang, GU; Lu, FENG; Shuyang, LI; Shoulong, ZHANG; and Chaung, CHEN (2025) "Research on Whole-Hole Testing Technology for Under-Anchor Tension in Prestressed Concrete Girders," Journal of China & Foreign Highway: Vol. 45: Iss. 6, Article 23.
DOI: 10.14048/j.issn.1671-2579.2025.06.023
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss6/23

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