Journal of Civil Structural Health Monitoring
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Evaluation of static and dynamic long-term structural monitoring for monumental masonry structure
Journal of Civil Structural Health Monitoring - Tập 9 - Trang 169-182 - 2019
This paper presents the comparative results of the static and dynamic monitoring of damaged masonry macro-elements. The structural health monitoring (SHM) has been carried out over 3 years. The crack opening displacement of the main shear cracks of the overturning mechanisms of the façade, of the bottom walls of transept and the cracks of the arches was monitored using extensometers. Moreover, dyn......
Research on bridge structure SAM based on real-time monitoring
Journal of Civil Structural Health Monitoring - Tập 12 - Trang 725-742 - 2022
To study the problems of frequent omissions and false alarms in the early warning system due to defects in the safety assessment method (SAM) of the existing bridge health monitoring systems (BHMS). In this paper, the current safety evaluation methods of BHMS are deeply studied through fuzzy comprehensive evaluation method and derive a new type of bridge health monitoring system SAM based on the s......
Crack detection in prestressed concrete structures by measuring their natural frequencies
Journal of Civil Structural Health Monitoring - Tập 8 - Trang 661-671 - 2018
When inspecting the health of a civil structure, it is important to have efficient techniques to detect the possible presence of structural damage. This work deals with the detection of damage in prestressed concrete structures, which are widely used in road bridges and long span slabs, among others. Concrete structures can be affected by different pathologies, with the transverse cracks beingone ......
Crack width measurement with OFDR distributed fiber optic sensors considering strain redistribution after structure cracking
Journal of Civil Structural Health Monitoring - - 2024
Crack monitoring is an important task in structural health monitoring. In this study, a procedure is developed to assess the crack width based on the strain curve of distributed fiber optic sensors (DFOS), taking into account of the strain redistribution of the structural substrate after cracking. Fifteen aluminum alloy plates with two or three pre-cut cracks spaced at varying intervals were insta......
Experimental study for non-destructive mechanical evaluation of ancient chestnut timber
Journal of Civil Structural Health Monitoring - Tập 1 - Trang 103-112 - 2011
The paper deals with an experimental study for in situ mechanical characterization of ancient timber members using combined Non Destructive Testing (NDT) techniques. An experimental campaign, including non-destructive and destructive tests, was developed on timber structural elements and defect-free specimens, made of old chestnut wood (Castanea sativa Mill.). The following NDT methods were employ......
Intelligent settlement monitoring system of high-speed railway bridge
Journal of Civil Structural Health Monitoring - Tập 9 - Trang 307-323 - 2019
With the large-scale construction of high-speed railway bridges, monitoring their settlement has become an increasingly important task to ensure the safe operation of a high-speed railway. This paper presents a case study of a 100-km-long portion of an intelligent settlement monitoring system for the high-speed railway bridges (SMAIS) of the Beijing–Shanghai railway. The SMAIS consists of a sensor......
Full-scale experimental investigation of wire breakage detection in deviated multi-strand tendon systems
Journal of Civil Structural Health Monitoring - Tập 6 - Trang 217-235 - 2016
The use of post-tensioning tendons with flexible filler is expected to increase in U.S. bridges in the coming years as an alternative to grouted tendons. Flexible filler results in purely unbonded behavior when used with either internal or external tendons, which creates opportunities for the application of tendon monitoring techniques that were not possible with grouted tendons. One such techniqu......
Building information modeling-based bridge health monitoring for anomaly detection under complex loading conditions using artificial neural networks
Journal of Civil Structural Health Monitoring - Tập 11 - Trang 1301-1319 - 2021
This study developed an Industry Foundation Classes (IFC) building information modeling (BIM) based framework for bridge health monitoring using behavioral prediction under complex loading conditions. The proposed framework predicts the behavior of the current bridge state under complex loading conditions then employs an anomaly detection method that compares the measured behavior of the bridge st......
Spatial shape identification of long-span suspension bridges using 3d laser scanning technology
Journal of Civil Structural Health Monitoring - - Trang 1-18 - 2023
Nowadays, terrestrial laser scanning (TLS) technology is increasingly utilized in the field of bridge maintenance, because of its efficiency and speed of execution. However, challenges still remain for the practice of long-span bridges. In fact, for long-span bridges, the accuracy of point cloud data can be specially affected by the scan geometry. Long-span bridges such as suspension bridges, cabl......
Multi-bandwidth wavelet transform of impact echo signals for delamination detection of thin concrete slabs
Journal of Civil Structural Health Monitoring - Tập 6 - Trang 649-664 - 2016
In this study, a multi-bandwidth wavelet transform of signals with mixed frequencies from multiple delamination mechanisms is proposed to achieve the time and frequency resolution required in delamination detection. It was applied to detect six embedded defects, simulating shallow and deep delamination, in a 60 in. × 36 in. × 7.25 in. reinforced concrete slab from impact echo signals recorded at 4......
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