The University of Miami civil engineers developed the continual analytics techniques based on fracture mechanics and acoustic-emission analytics that together with the software infrastructure make it possible to perform more accurate and real-time monitoring of bridge deterioration. For civil structural health monitoring, this introduces a shift from time- to event-based analytics by exploiting a rolling, potentially complex, significant event-based threshold that triggers the analytics.
The system was deployed on a single laboratory test specimen to assess the validity of the messaging and analytical tools in a simulated bridge environment.
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Infrastructure sensing. Future-proofing our existing and new infrastructure has become a constant theme in government and industry discussions. To achieve this, we need to understand the performance of our infrastructure … Expand.
Smart bridge technologies are being implemented in the redesign, providing more efficient and real-time monitoring and inspection. This tragedy may have been prevented had the bridge been equipped with a network of smart bridge sensors providing continuous monitoring of various properties. For instance, the six-lane, 2. Soon after opening in , the sensors detected abnormal vibrations in the cables holding the bridge, which led engineers to install additional weight to dampen the cables.
Only a handful of other smart bridges across the globe incorporate sensors of various types, including accelerometers, strain gauges, anemometers, weigh-in-motion devices, and temperature sensors. The Tsing Ma Bridge in Hong Kong, the world's seventh longest suspension bridge, is equipped with more than sensor channels.
The bridge, which can handle wind speeds up to miles kilometers per hour, uses GPS sensors mounted on the towers and cables to measure wind speed. Additional smart bridges in action include the following. The St. Anthony Falls Bridge , the I bridge which replaced the Minneapolis bridge that collapsed, was constructed in a joint venture between Flatiron-Manson and Figg Bridge Engineers.
Completed in September , the bridge was constructed with two parallel structures, one for each direction of traffic, using prestressed concrete box girders. The river span used precast segmental construction and the remaining three spans used cast-in-place concrete. Over off-the-shelf sensors collect data regarding structural behavior and corrosion on the St. Anthony Falls Bridge. Structural deformations are measured by vibrating wire strain gauges VWSGs , 24 resistive strain gauges, and 12 fiber optic displacement sensors.
These fiber optic sensors, which provide overall curvatures of the river span for calculating deflections, are mounted in six pairs at the top and bottom of the exterior box girder of Span 2 the middle span that crosses the river.
Temperatures in the bridge and thermal gradients throughout the structure are measured by thermistors, including those integrated into the strain gauges. The race to deploy sensors and communications technologies for Smart Cities and Smart Streets is on.
These technologies can be used to better…. July 15, Transportation Management. Consortium launches to create smart, connected region in North Texas. June 03, City of Austin to accelerate smart city technologies through NTT partnership. June 01, Image: Mineta Transportation Institute. Researchers provide framework for integrating transportation into smart cities. Researchers with the Mineta Transportation Institute MTI recently published a report examining existing smart cities in order to develop a….
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