Improved concrete bridge deck evaluation using GPR by accounting for signal depth-amplitude effects

被引：91

作者：

Barnes, Christopher L. ^{[1
]}

Trottier, Jean-Francois ^{[1
]}

Forgeron, Dean ^{[1
]}

机构：

[1] Dalhousie Univ, Nova Scotia CAD CAM Ctr, Off B233, Halifax, NS B3J 2X4, Canada

来源：

NDT & E INTERNATIONAL | 2008年 / 41卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ground penetrating radar; deck; chloride ingress; corrosion; damage; repair estimates;

D O I：

10.1016/j.ndteint.2008.03.005

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ground-penetrating radar (GPIZ)surveys have tended to provide unpredictable accuracy in estimating areas of corrosion-induced damage in reinforced concrete bridge decks. Six in-service reinforced concrete bridge decks with exposed (unpaved) concrete wearing surfaces were surveyed using GPR to evaluate internal corrosion-induced damage for comparison against the chain drag and half-cell potential survey methods. A normalization procedure for removing GPR signal losses resulting from depth-dependent two-way travel time variations in the data was developed and thresholds for predicting chain-drag and half-cell potential-based estimates of deterioration quantity and location were established. Thresholds established using the amplitude-time correction provided significant improvements in the spatial and quantitative predictive capabilities of GPR for delineating corrosion-induced damage. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：427 / 433

页数：7

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