3D-FE model field-calibration and rating studies on existing r/c buildings

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2006

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Demirok, Emel

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Dynamic instrumentation and a series of ambient vibration tests were performed on a four storey strengthened R/C building within the scope of this study. Traffic load and wind load were accepted as natural dynamic loads and the vibrations were recorded by sensitive accelerometers.For that study, 12 uniaxial, 1 triaxial accelerometers and a 15 channel data logger system were used. Four sets of dynamic measurements were recorded over a period of 6 months. Recorded readings were analyzed using UPC, PC and CVA algorithms and Artemis software. The natural freqeuncies, mode shape of the tested building were determined. The experimental results were compared against each other. A 3D-FE model of the building was prepared and analytical results were also compared against experimental results.The calibration (updating) of the analytical model was carried out using the experimentally obtained mode shapes and freqeunices. The results of the study indicate that first few mode shapes and freqeuncies of the building can be obtained successfully within zero to 10 Hz range using ambient monitoring. Field calibrated FE models can effectively simulate the first translational and torsional modes of the building. Calibration studies indicate that the upper floor is more flexible than the nominal model and there are weaknesses between the shear wall and roof slab connections.

Subject Keywords

Structural engineering.

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http://etd.lib.metu.edu.tr/upload/12607223/index.pdf
https://hdl.handle.net/11511/15894

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Demirok, “3D-FE model field-calibration and rating studies on existing r/c buildings,” M.S. - Master of Science, Middle East Technical University, 2006.