A Strain-Based Load Identification Model for Beams in Building Structures
| Autor: | Jihoon Lee, Yousok Kim, Kappyo Hong, Se Woon Choi, Hyo Seon Park |
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| Rok vydání: | 2013 |
| Předmět: |
Engineering
strain sensing load identification structural health monitoring steelbeams Compressive Strength steel beams Flange lcsh:Chemical technology Biochemistry Load cell Article Analytical Chemistry Fiber Bragg grating Tensile Strength Transducers Pressure Computer Simulation lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation Strain gauge Strain (chemistry) Computer simulation Construction Materials business.industry Equipment Design Structural engineering Models Theoretical Atomic and Molecular Physics and Optics Equipment Failure Analysis Computer-Aided Design Stress Mechanical Structural health monitoring business Beam (structure) |
| Zdroj: | Sensors; Volume 13; Issue 8; Pages: 9909-9920 Sensors, Vol 13, Iss 8, Pp 9909-9920 (2013) Sensors (Basel, Switzerland) SENSORS(13): 8 |
| ISSN: | 1424-8220 |
| Popis: | A strain-based load identification model for beam structures subjected to multiple loads is presented. The number of sensors for the load identification model is the same as the number of load conditions acting on a beam structure. In the model, the contribution of each load to the strains measured by strain sensors is defined. In this paper, the longitudinal strains measured from multiplexed fiber Bragg grating (FBG) strain sensors are used in the load identification. To avoid the dependency on the selection of locations for FBG sensors installed on a beam structure, the measured strain is expressed by a general form of a strain sensing model defined by superimposing the distribution shapes for strains from multiple loads. Numerical simulation is conducted to verify the model. Then, the load identification model is applied to monitoring of applied loads on a 4 m-long steel beam subjected to two concentrated loads. In the experiment, seven FBG sensors and nine electrical strain gages (ESGs) were installed on the surface of the bottom flange. The experimental results indicate a good agreement between estimated loadings from the model and the loads applied by a hydraulic jack. |
| Databáze: | OpenAIRE |
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