Modal testing of masonry constructions by ground-based radar interferometry for structural health monitoring: A mini review

Abstract

Modal testing is one of the most effective experimental techniques for the structural health monitoring of masonry constructions, as it provides useful information for the calibration of structural models and for the assessment of structural damage. However, the application of modal testing to masonry constructions is sometimes hindered by the complexity of the conventional experimental set-up, which is generally based on contact sensors. In order to overcome this issue, several researchers are exploring the application of the ground-based radar interferometry, which is an increasingly popular measurement technique for remotely monitoring displacement and vibration of structures. Given the recently increasing number of articles on this subject, here we propose a mini review on the most significant works dealing with the application of ground-based radar interferometry for modal testing of masonry constructions. In particular, we show the current state of the art and highlight the main research gaps with the purpose of assessing the effectiveness of ground-based radar interferometry for the structural health monitoring of these constructions. Our mini review is primarily aimed at engineers and scientists who already know about modal testing and radar interferometry technique and are interested in the specific application to masonry constructions.

A Robust Deep Learning-Based Damage Identification Approach for SHM Considering Missing Data

“…θ ← θ − α∇L θ (4) Compared to shallow neural networks with hand-crafted features [40], deep learning is designed to learn more effective representations that extract the nonlinear relationships hidden in data through end-to-end training. However, the parameter space can become extremely large for deep neural networks with dense connections, which can lead to issues such as overfitting and training difficulties.…”

“…Civil infrastructures, including roads and bridges [1][2][3], buildings [4][5][6], dams [7][8][9], etc., are suffering from performance deterioration due to harsh environments, loadings, and even natural or man-made disasters. Structural health monitoring (SHM) is a critical technique that emerged in the past decades to detect and evaluate the condition of a structure in real-time [10][11][12].…”

Moderate-coherence sensing with optical cavities: ultra-high accuracy meets ultra-high measurement bandwidth and range

“…However, the limited range has hindered their practical utility, preventing them from capturing rapid changes or transient events. A combination of high accuracy in large measurement ranges is also critical for various other fields including precision manufacturing 6 – 8 , biomedical sensing 9 – 11 , and structural health monitoring 12 , 13 .…”

Satellite Synthetic Aperture Radar, Multispectral, and Infrared Imagery for Assessing Bridge Deformation and Structural Health—A Case Study at the Samuel de Champlain Bridge

“…Similarly, radar interferometry has also been used to monitor civil infrastructures with ground-based radar [6]. The extremely fast image acquisition rate of ground-based radars allows both static and dynamic testing of structures, including modal testing [7] and ambient vibration testing [8].…”