基于探地雷达的人行天桥桥面健康评估

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2018-01-01 DOI:10.56748/ejse.182261

S. Miramini, M. Sofi, A. Aseem, A. Baluwala, L. Zhang, P. Mendis, C. Duffield

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引用次数: 5

摘要

使用探地雷达(GPR)扫描混凝土结构仍然是检测混凝土结构内部缺陷(即裂缝、空洞和分层)以及检测钢筋腐蚀损伤的最有效方法之一。本研究的目的是评估一座45年历史的人行天桥的结构健康状况。为了实现这一目标，在已知施工图的坚固混凝土地板上进行了一系列使用GPR系统的实验，以检测覆盖深度和钢筋方向。通过实验验证探地雷达检测结果后，将探地雷达检测系统用于人行桥面无损检测。根据扫描结果确定了钢筋的位置和方向。此外，通过测量b -扫描双曲线的厚度来估计棒状结构的直径。扫描输出显示没有钢筋腐蚀的迹象，也没有分层或开裂形式的混凝土损坏。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Health Assessment of a Pedestrian Bridge Deck using Ground Penetrating Radar

Scanning concrete structures using ground penetrating radars (GPR) continues to be one of the most efficient methods for defect (i.e. crack, void and delamination) detection within concrete structures as well as detection of reinforcing bars damage due to corrosion. The aim of this study was to assess the structural health of a 45-year old pedestrian bridge deck. To achieve this, a number of experiments using a GPR system were conducted on a strong concrete floor with known construction drawings to detect cover depth and rebar orientations. After validating the GPR results through the experiments, the GPR system was used for nondestructive assessment of the pedestrian bridge deck. From the scanned results, the location and orientation of the reinforcing bar were established. In addition, the diameters of the bars was estimated by measuring the thickness of the hyperbola curves in the B-scans. The scanned output shows no signs of corrosion of reinforcement or damage of concrete in the form of delamination or cracking.

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来源期刊

Electronic Journal of Structural Engineering Engineering-Civil and Structural Engineering

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The Electronic Journal of Structural Engineering (EJSE) is an international forum for the dissemination and discussion of leading edge research and practical applications in Structural Engineering. It comprises peer-reviewed technical papers, discussions and comments, and also news about conferences, workshops etc. in Structural Engineering. Original papers are invited from individuals involved in the field of structural engineering and construction. The areas of special interests include the following, but are not limited to: Analytical and design methods Bridges and High-rise Buildings Case studies and failure investigation Innovations in design and new technology New Construction Materials Performance of Structures Prefabrication Technology Repairs, Strengthening, and Maintenance Stability and Scaffolding Engineering Soil-structure interaction Standards and Codes of Practice Structural and solid mechanics Structural Safety and Reliability Testing Technologies Vibration, impact and structural dynamics Wind and earthquake engineering. EJSE is seeking original papers (research or state-of the art reviews) of the highest quality for consideration for publication. The papers will be published within 3 to 6 months. The papers are expected to make a significant contribution to the research and development activities of the academic and professional engineering community.