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![Sensor instrumentation of the masonry dam (source: [29], modified).](profile/Kay-Smarsly/publication/319141096/figure/fig2/AS:528012462772224@1502899389546/Sensor-instrumentation-of-the-masonry-dam-source-29-modified.png)
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![Figure 3: Sensor instrumentation of the masonry dam (source: [29],...](profile/Kay-Smarsly/publication/319141096/figure/fig2/AS:528012462772224@1502899389546/Sensor-instrumentation-of-the-masonry-dam-source-29-modified_Q320.jpg)
![Figure 4: Sensor data used for validation (source: [29], modified).](profile/Kay-Smarsly/publication/319141096/figure/fig4/AS:667648056643599@1536191109651/Sensor-data-used-for-validation-source-29-modified_Q320.jpg)
This paper summarizes the results of a study investigating multi-agent technology deployed for decentralized, autonomous dam monitoring. Multi-agent systems, representing decentralized computing systems, have been used in artificial intelligence research for many years to tackle problems that are difficult or impossible to be solved by individual c...
Contexts in source publication
Context 1
... masonry dam, built in 1906, is a 51 m high and 320 m long arc-gravity structure instrumented with an array of sensors in accordance with German guidelines [9]. As shown in Figure 3, the sensor instrumentation includes two plumb lines and two inverse plumb lines, two inclinometers as well as 18 piezometers. Not shown in Figure 3 are 40 temperature gauges and a fiber optic sensor for temperature measurements. ...
Context 2
... shown in Figure 3, the sensor instrumentation includes two plumb lines and two inverse plumb lines, two inclinometers as well as 18 piezometers. Not shown in Figure 3 are 40 temperature gauges and a fiber optic sensor for temperature measurements. For validating the monitoring system, sensor data from the masonry dam recorded over 115 weeks is used. ...
Citations
The article presents a technique for automating the calculation of local stresses from the application of a concentrated load on additional structural elements of box-section spans with riding beams based on continuous monitoring data to assess the current technical condition and then predict the state of the structure. The necessity of applying an analytical approach to assessing the stress-strain state of a structure at the initial stages of design and technical operation has been substantiated. The drawbacks of the existing analytical approach to stress assessment are shown. Taking into account the available resources, an acceptable research program was developed and implemented, which would lead to satisfactory results. In accordance with the program, a series of numerical experiments was carried out using software that makes it possible to simulate complex structures and solve them using the finite element method, aimed at obtaining an array of data, the use of which would improve the accuracy of the existing analytical solution. By using software aimed at processing scientific data arrays, mathematical dependences of the required parameters on the initial constructive data were obtained. Formulas and initial data were obtained for calculating correction factors, which improve the accuracy of calculating local compressive and bending stresses. These formulas were combined with the already existing analytical dependencies in order to obtain a simple and easily applicable method for determining the actual local stresses from the application of an indirect concentrated load. As a result of scientific research, a new method for the analytical determination of local bending and compression stresses in riding beams was proposed on the basis of an analysis of the existing methodology and a series of numerical experiments.
This paper summarizes the results of a student project conducted within the scope of the "Bauhaus Summer School 2019" at Weimar, Germany. Climate change and manmade disasters increasingly cause adverse variations in loading civil infrastructures have not been designed for. Control systems mounted on civil infrastructure provide additional capacities that help resist loads by controlling structural responses. Passive control systems, the most basic type, are add ons integrated into civil infrastructure providing counter actions against dynamic loads. The design of passive control systems is easily done and external power sources are not needed. However, one disadvantage of passive control systems is the inability to work under unknown load conditions, producing negative effects on structures. To overcome the disadvantages of passive control systems, semi-active control systems, such as semi-active tuned liquid column dampers (STLCD), have been proposed. STLCD may be distinguished according to the valve used for controlling the liquid flow, e.g. vertical valves or rotational valves, where, in the case of rotational valves, further studies are needed to investigate the effects of the opening angle to the behavior of STLCDs. In this paper, an experimental study is conducted for evaluating the optimal valve opening of a STLCD mounted on a shear-frame structure and exposed to different excitations. Specifically, a shear-frame structure, instrumented with a tuned liquid column damper system and a rotational valve, is subject to different valve openings, and the structural response is compared in time-domain and frequency-domain for the different use cases. The results of this study may serve as a basis for mathematically describing relations between the opening valve angle and the structural control performance of STLCD systems.
