New Method to Rapidly Check Concrete Bridges with External Tendons – KIT Researchers Facilitate Predictive Maintenance of Infrastructure Facilities in Germany
The new ResoBridge method has been developed to check bridges during running traffic within one day. It measures the vibrations of the tensioning ropes of externally prestressed concrete bridges. The test method developed by Karlsruhe Institute of Technology helps control the state of infrastructure facilities and optimizes early planning of necessary repairs. In the future, it may also be used to check cable-stayed bridges and constructions as well as hybrid towers of wind power plants.
Nearly 40,000 bridges exist in Germany. They have to withstand enormous loads. In particular, they have to cope with the growing heavy goods vehicle traffic. To guarantee safety of bridges, regular inspections are required. However, visual methods allow the damage to be detected in a rather advanced state only. Other methods, such as ultrasound, radiography or magnet-inductive testing, are time-consuming and expensive. Moreover, the bridges partly have to be closed for the traffic.
The ResoBridge method developed by Lothar Stempniewski and Steffen Siegel of the KIT Institute of Concrete Structures and Building Materials (IMB) represents an inexpensive and reliable alternative. The patented method is suited for concrete bridges with external tendons that are not cast into the concrete. These bridges are equipped with a hollow concrete box underneath the road. Six steel ropes inside the box ensure stability. Such externally prestressed concrete bridges can be found all over Germany.
The ResoBridge method is based on an acceleration sensor measuring natural vibrations of the tensioning ropes. The values measured are compared to results of earlier measurements. “A decreasing frequency indicates decreasing tension of the rope. Significant changes of the values suggest damage of the wires or braids,” explains Steffen Siegel, IMB. The method measures the frequency spectra with an accuracy of up to 0.01 Hertz. To detect changes, an initial value has to be determined as a reference. The KIT researchers were involved in the development of an instrument that stores all values measured and indicates frequency changes.
The instrument is easy to operate. Measurement of the values, inclusive of the assembly and disassembly of the sensor at the measurement point, takes a few minutes only. The check of a bridge will take one day without the bridge having to be closed for the traffic. Hence, ResoBridge saves time and costs. All bridge data are recorded centrally. The method can also be used to compare various tensioning units and bridges. Presently, the method is being further developed for use on other constructions. Future application to cable-stayed bridges and constructions as well as to hybrid towers of wind power plants is envisaged.
The Latest on: Predictive Maintenance
via Google News
The Latest on: Predictive Maintenance
- ABB’s Asset Management Solution for Metals Set to Boost Efficiency and Productivity At CELSA Barcelonaon February 4, 2020 at 8:38 am
It offers CELSA a complete overview of its production assets’ health, avoiding unnecessary maintenance, reducing exposure to hazardous areas and speeding repairs. “ABB’s digital solution will provide ...
- ONYX InSight, Castrol partner to deliver independent oil sensor study for the wind industryon February 4, 2020 at 5:53 am
ONYX InSight, provider of predictive maintenance to the wind industry, and lubricants expert Castrol have embarked on a multi-phase study designed to uncover the potential of combining oil and ...
- Digital MRO Market 2020 Analysis Research and Development Forecast by 2025on February 3, 2020 at 5:23 am
New York, February 03, 2020: Market Research Engine has published a new report titled as "Digital MRO Market Size by Technology (Predictive Maintenance, AR/VR, 3D Printing, Blockchain, Artificial ...
- Predictive Maintenance Market Demanded Globallyon February 3, 2020 at 4:20 am
A recently published titled Predictive Maintenance Market is an in depth study providing entire analysis of the industry for the period 2018 to 2025. Also analyzes the market status, Predictive ...
- Predictive Maintenance Market Future Scope – IBM, SAP SE, Software AGon January 30, 2020 at 10:33 pm
Pune, Maharashtra, January 31, 2020 (Wired Release) Prudour Pvt. Ltd. The latest report introduced by MarketResearch.Biz gives deep insights into the drivers and restraints in the Worldwide Predictive ...
- Automotive Predictive Maintenance Market - Global Industry Analysis, Size, Share, Growth, Trends, and Forecast, 2019 - 2027on January 30, 2020 at 2:34 pm
Automotive Predictive Maintenance Market: Scope of the Report A new study on the global automotive predictive maintenance market published presents a wealth of information on key market dynamics, ...
- Predictive maintenance with Nest HVAC alertson January 30, 2020 at 1:32 pm
The adaptable self-learning device also programs itself. It builds a heating schedule based on user behavior by observing heating or cooling demands and is now being tested with a feature that ...
- Predictive maintenance tool from C3.ai uses artificial intelligence AI to forecast aircraft maintenanceon January 30, 2020 at 4:34 am
That prototype period ended in December. During that period, the C3.ai predictive maintenance software was able to forecast about one-third of unscheduled maintenance events to subsystems.
- Global Predictive Maintenance Market Application, Revenue Status, Leading Player, Demand, Growth, Future Opportunity & Forecast to 2026on January 29, 2020 at 9:50 pm
A new market research report by Big Market Research on Predictive Maintenance market reveals that the market is estimated to grow with a substantial growth rate from 2019-2026. This report is a ...
- How Wireless Tech is Changing Predictive Maintenanceon January 28, 2020 at 10:10 am
To avoid such costly incidents, extend the life of equipment, and reduce operational inefficiencies in the process, industrial plant operators are increasingly turning to predictive maintenance (PdM) ...
via Bing News