New technological developments and methods help infrastructure operators to detect early safety risks, achieve longer life spans for their assets and reduce maintenance costs.
New Technologies for Structural Testing and Health Monitoring
The safety, maintainability, and livability of the world’s civil infrastructure depend on structural testing and structural health monitoring (SHM) applications. Typically short in duration, structural tests are implemented within the lab environment and need some kind of a stimulus signal. In contrast, structural health monitoring refers to continuous monitoring of structures in the field under natural operating conditions. Read this paper that focuses on SHM, discussing concepts that can apply to structural tests as well.
Structural Health Monitoring of the 2008 Olympic Venues
CGM Engineering Performing built a health monitoring (SHM) to determine the stability, reliability, and livability of multiple large structures throughout China, including the new Olympic venues in Beijing, by using the NI CompactDAQ and CompactRIO platforms along with NI LabVIEW.
Monitoring the Structural Health of the Rion-Antirion Bridge
ADVITAM developed a structural monitoring system to measure and define the behavior of the Rion-Antirion Bridge during normal operation, strong winds, and earthquakes, by using a combination of four PXI/SCXI chassis linked with the NI LabVIEW Real-Time Module to incorporate the conditioning, acquisition, processing, control, storage, and sharing of measurements.
Reducing Seismic Risk for an Ancient Roman Amphitheater
IRS built a distributed monitoring system to identify structural damage and reduce seismic risk of the Arena di Verona—one of the largest open-air opera theater in the world, built in the first century, by creating a system to continuously communicate with existing measurement sensors, track changes in a crack, and the onset of structural vibrations related to environmental changes, using a system that integrates NI CompactRIO with EtherCAT hardware, the NI wireless sensor network (WSN) platform, and NI LabVIEW software.
Meazza Stadium Uses NI CompactRIO to Usher in a New Frontier in Structural Monitoring
The POLITECNICO DI MILANO created a new, continuous, real-time vibration monitoring system for the evaluation of the structural integrity of the Meazza Stadium in Milan, by developing a sensor network in strategic points of the structure with distributed acquisition and data storage using the NI CompactRIO platform.
Modal Analysis in NI LabVIEW
Several severe bridge collapses around the world in the past few years have led to hundreds of lives and billions of dollars lost. Unfortunate accidents like these can be avoided through better design, validation, and monitoring of critical structures such as bridges. For this reason, modal analysis has become increasingly popular in R&D departments and online real-time monitoring systems. National Instruments continues to provide modal analysis solutions from laboratory test to online monitoring. The following paper examines the hardware architecture as well as the specific modal parameter extraction algorithms used in industry to uncover the modal parameters of a structure.
Using Vibrating Wire Sensors with CompactRIO
Vibrating wire sensors are a class of sensors that are very popular in geotechnical and structural monitoring with a reputation for long term stability and wide usage for monitoring structures such as dams, tunnels, mines, bridges, foundations, piles, unstable slopes, and excavations. This paper explains how to use them in combination with NI CompactRIO.