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Experimental identification of modal parameters for the model of a building subjected to short-term kinematic excitation Cover

Experimental identification of modal parameters for the model of a building subjected to short-term kinematic excitation

Studia Geotechnica et Mechanica
Volume 40 (2018): Issue 4 (December 2018)
By:   
Open Access
|Dec 2018
Figures & tables

Figures & Tables

Figure 1

The slab-and-column model: (a) physical; (b) theoretical.

Figure 2

The shake table: (a) main elements and (b) possible directions of kinematic excitation.

Figure 3

Measurement instruments—PULSE system by Brüel & Kjær.

Figure 4

Kinematic excitations: (a) “sine”; (b) “trapezium”.

Table 1

Data on kinematic excitations.

Measurement No.Name of excitationAmplitude of excitation (mm)Time duration of excitation (s)
1“sine”20.5
2“sine”40.5
3“trapezium”21
4“trapezium”41
5“trapezium”22
6“trapezium”42
Table 2

Key results of experimental research.

Measurement
No. 1No. 2No. 3No. 4No. 5No. 6
Values of limit expressions—formulas (11, 12)Y1c249.353496.455422.826843.34401.447788.547
(mm)
Y2c349.069695.045591.9671,180.66562.0361,103.95
(mm)
Y3c398.909794.343676.5421,349.31642.3351,261.64
(mm)
Zc6,283.1912,566.410,000.020,000.010,000.020,000.0
(mm/s2)
Coefficients of the stiffness matrix have been determined based on formula (13)k11,037.61,042.31973.876976.5461,025.741,044.4
(N/m)
k21,918.931,927.071,800.511,805.641,896.41,931.1
(N/m)
k32,561.72,571.532,402.582,409.762,530.532,577.21
(N/m)
Natural frequencies of the model have been determined based on formulas (14, 15)f10.6650.6670.6440.6450.6610.667
(Hz)
f22.3432.3492.2702.2742.3302.351
(Hz)
f33.9293.9373.8063.8113.9063.942
(Hz)
Figure 5

The results obtained from the first measurement: (a) displacement plots in the time domain t and (b) displacements determined in accordance with formula (7).

Figure 6

Results obtained from the second measurement: (a) displacement plots in the time domain t; and b) displacements determined in accordance with formula (7).

Figure 7

The results obtained from the third measurement: (a) displacement plots in the time domain t and (b) displacements determined in accordance with formula (7).

Figure 8

The results obtained from the fourth measurement: (a) displacement plots in the time domain t and (b) displacements determined in accordance with formula (7).

Figure 9

The results obtained from the fifth measurement: (a) displacement plots in the time domain t and (b) displacements determined in accordance with formula (7).

Figure 10

The results obtained from the sixth measurement: (a) displacement plots in the time domain t and (b) displacements determined in accordance with formula (7).

DOI: https://doi.org/10.2478/sgem-2018-0030 | Journal eISSN: 2083-831X (formerly 0137-124X) | Journal ISSN: 0137-6365
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Language: English
Page range: 321 - 332
Submitted on: Nov 8, 2018
Accepted on: Nov 14, 2018
Published on: Dec 31, 2018
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Keywords:
experimental studies,
input-output method,
identification of modal parameters,
kinematic excitation
Related subjects:
Geosciences,
Geosciences, other,
Materials sciences,
Composites,
Porous materials,
Physics,
Mechanics and fluid dynamics

© 2018 Krzysztof Majcher, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 40 (2018): Issue 4 (December 2018)
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