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View article: Analyzing Concrete Cracking Along Civil Infrastructure using Distributed Fiber Optic Sensing
Analyzing Concrete Cracking Along Civil Infrastructure using Distributed Fiber Optic Sensing Open
Crack monitoring using distributed fiber optic sensing (DFOS) in civil engineering has evolved significantly during recent years. Scientific and commercial applications often focus on distributed strain sensing based on Rayleigh scattering…
View article: Water Vapor Transport in Dry Sand During Evaporation Monitored by Quasi‐Distributed Fiber‐Optic Sensing Technology
Water Vapor Transport in Dry Sand During Evaporation Monitored by Quasi‐Distributed Fiber‐Optic Sensing Technology Open
Water vapor transport in the dry soil layer (DSL) plays a critical role in water and energy exchange between soil and atmosphere in semi‐arid and arid regions. However, monitoring water vapor transport in extremely dry soils remains challe…
View article: Destructive Testing of the Pinkabach Railway Bridge – Large scale Testing of Sensor Systems for Fatigue Crack Monitoring and System Identification
Destructive Testing of the Pinkabach Railway Bridge – Large scale Testing of Sensor Systems for Fatigue Crack Monitoring and System Identification Open
The work presents experiments carried out on an out-of-service steel railway bridge, the so called Pinkabach bridge. The objective was to test advanced and novel sensor systems, i.e. Distributed Fiber Optic Sensing (DFOS) and Acoustic Emis…
View article: Large scale monitoring of a highway bridge with remote sensing and distributed fiber optic techniques during load tests
Large scale monitoring of a highway bridge with remote sensing and distributed fiber optic techniques during load tests Open
Many bridges in western countries are at the end of their lifetime and hence Structural Health Monitoring is vital to ensure their safe operation. Load test are one way to assess the utilization grade and to decide if actions have to be ta…
View article: Drive-by Structural Monitoring using GNSS measurements at alpine bridges
Drive-by Structural Monitoring using GNSS measurements at alpine bridges Open
Most bridges in Europe were built in the 1960s and 1970s and are now reaching the end of their design life. It is therefore important to monitor these bridges to ensure a safe operation for many years to come. Load tests are a common way o…
View article: A Framework for Bootstrapping Event Classification Datasets
A Framework for Bootstrapping Event Classification Datasets Open
Machine learning models require large amounts of training samples: in most cases, thousands of unique instances are required for each class of events. Constructing such a dataset is an extremely expensive task in terms of the time it takes…
View article: Performance Comparison of Different Vibration Control Strategies
Performance Comparison of Different Vibration Control Strategies Open
Structural engineers are always struggling with the unpredictable complexities of the extreme vibration due to natural or human induced loads. It is not possible to eliminate the vibration from structures entirely what so ever. Therefore, …
View article: Effect of sensors locations and magnitudes of dynamic loads on dynamical properties in structural health monitoring
Effect of sensors locations and magnitudes of dynamic loads on dynamical properties in structural health monitoring Open
The monitoring of civil structures and infrastructures are gaining momentum due to the recent technological developments of the various sensors. Typically, almost all structures are vulnerable to dynamic loads which even add more challenge…
View article: The Global DAS Month of February 2023
The Global DAS Month of February 2023 Open
During February 2023, a total of 32 individual distributed acoustic sensing (DAS) systems acted jointly as a global seismic monitoring network. The aim of this Global DAS Month campaign was to coordinate a diverse network of organizations,…
View article: DYNAMIC BRIDGE MONITORING WITH REMOTE SENSING TECHNIQUES
DYNAMIC BRIDGE MONITORING WITH REMOTE SENSING TECHNIQUES Open
Dynamic monitoring of bridges is usually performed with mounted sensors on the structure. Typically used technologies are accelerometers, electric strain gauges or fibre bragg grating sensors. All of them have the drawback that access to t…
View article: STRUCTURAL PERFORMANCE MONITORING EMPLOYING LINEAR OBSERVER
STRUCTURAL PERFORMANCE MONITORING EMPLOYING LINEAR OBSERVER Open
Structural performances are heavily relying on the overall health conditions (damaged or healthy) of any dynamical system. Hence, it is essential to keep them monitored to avoid any partial/fully damaged situation. Due to the availability …
View article: Interoperable, platform independent structural health monitoring with long‐term availability
Interoperable, platform independent structural health monitoring with long‐term availability Open
Within the FFG‐project PreMainSHM the area of preventive structural health monitoring is raised to a new level of networked systems. This applies not only to the networking of self‐sustaining sensors and their sensor data, but also to the …
View article: Drive-by infrastructure monitoring: a workflow for rigorous deformation analysis of mobile laser scanning data
Drive-by infrastructure monitoring: a workflow for rigorous deformation analysis of mobile laser scanning data Open
This paper presents a practical and efficient workflow for deformation monitoring of transport infrastructure. We propose using commercially available mobile laser scanning (MLS) systems to scan civil infrastructure while driving by in a c…
View article: Global Distributed Fibre Optic Sensing recordings of the February 2023 Turkey earthquake sequence.
Global Distributed Fibre Optic Sensing recordings of the February 2023 Turkey earthquake sequence. Open
As part of a global distributed acoustic sensing (DAS) campaign, multiple DAS interrogators (from academia and industry) recorded simultaneously from 1st till 28th February 2023 in different regions of the globe. The objective is to define…
View article: DYNAMIC RESPONSE MITIGATION ADOPTING MULTI-DAMPING TECHNOLOGICAL STRATEGY
DYNAMIC RESPONSE MITIGATION ADOPTING MULTI-DAMPING TECHNOLOGICAL STRATEGY Open
Troublesome disturbance into the dynamical system is unavoidable not only due to extreme exogenous dynamic excitation but also for operational loading conditions.Hence, it is essential to employ appropriate vibration mitigation strategy to…
View article: STATIC AND DYNAMIC STRUCTURAL MONITORING OF CIVIL INFRASTRUCTURE OBJECTS WITH GNSS
STATIC AND DYNAMIC STRUCTURAL MONITORING OF CIVIL INFRASTRUCTURE OBJECTS WITH GNSS Open
Continuous monitoring of civil structures, especially critical infrastructure, is important to ensure a safe operation and to enable condition-based maintenance.For a complete assessment of the structure's performance its static and dynami…
View article: 3D concept creation of permanent geodetic monitoring installations and the a priori assessment of systematic effects using Virtual Reality
3D concept creation of permanent geodetic monitoring installations and the a priori assessment of systematic effects using Virtual Reality Open
Logistic processes of construction sites are transferred into virtual and full 3D environments to increase the interoperability for all project partners. These digital twins are emerging for the construction process of modern building proc…
View article: Large-scale distributed fiber optic sensing network for short and long-term integrity monitoring of tunnel linings
Large-scale distributed fiber optic sensing network for short and long-term integrity monitoring of tunnel linings Open
Structural integrity assessment is essential in modern tunneling to ensure safe construction works. State-of-the-art monitoring approaches like displacement readings of geodetic prisms are often limited in the spatial as well as the tempor…
View article: A Method for Efficient Quality Control and Enhancement of Mobile Laser Scanning Data
A Method for Efficient Quality Control and Enhancement of Mobile Laser Scanning Data Open
The increasing demand for 3D geospatial data is driving the development of new products. Laser scanners are becoming more mobile, affordable, and user-friendly. With the increased number of systems and service providers on the market, the …
View article: Uncertainties of Parameters Quantification in SHM
Uncertainties of Parameters Quantification in SHM Open
The uncertainties of parameters quantification due to various known and unknown conditions are crucial to understand structural health monitoring (SHM) systems. For instance, the amplitudes and the variation of loading conditions play a vi…
View article: Distributed Fiber Optic Shape Sensing of Concrete Structures
Distributed Fiber Optic Shape Sensing of Concrete Structures Open
Civil structural health monitoring (CSHM) has become significantly more important within the last decades due to rapidly growing construction volume worldwide as well as aging infrastructure and longer service lifetimes of the structures. …
View article: InSARTrac: a novel approach for remote acquisition of 3D slope displacement vectors
InSARTrac: a novel approach for remote acquisition of 3D slope displacement vectors Open
The recent advent of terrestrial interferometric synthetic aperture radar (InSAR) has greatly enhanced the ability of monitoring slope deformation. However, the displacements obtained are one-dimensional, offering little insight into the u…