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Vibrations of a Low-Frequency Floor Under Various Pedestrian Loading Scenarios

Huu Anh Tuan NGUYEN

Huu Anh Tuan NGUYEN

PhD; Faculty of Civil Engineering, University of Architecture Ho Chi Minh CityVietnam
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NGUYEN, Huu Anh Tuan
  
04 ago 2022
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Pubblicato online: 04 ago 2022
Pagine: 105 - 114
Ricevuto: 03 mar 2021
Accettato: 15 set 2021
DOI: https://doi.org/10.21307/acee-2021-034
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© 2021 Huu Anh Tuan NGUYEN, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Floor framing layout
Floor framing layout

Figure 2.

Floor response to heel drop
Floor response to heel drop

Figure 3.

Unfiltered response to two persons walking
Unfiltered response to two persons walking

Figure 4.

FFT for response to two persons walking
FFT for response to two persons walking

Figure 5.

Filtered response to two persons walking
Filtered response to two persons walking

Figure 6.

Filtered response due to one person walking
Filtered response due to one person walking

Figure 7.

Summary of RMS acceleration due to one person walking
Summary of RMS acceleration due to one person walking

Figure 8.

Summary of RMS acceleration due to two persons walking
Summary of RMS acceleration due to two persons walking

Figure 9.

Fundamental mode shape of test bay
Fundamental mode shape of test bay

Figure 10.

Simulated dynamic load induced by a person walking at1.90 Hz
Simulated dynamic load induced by a person walking at1.90 Hz

Figure 11.

Response due to a person walking at 1.90 Hz
Response due to a person walking at 1.90 Hz

Figure 12.

Response due to a 1.90-Hz person followed by a 1.80-Hz person
Response due to a 1.90-Hz person followed by a 1.80-Hz person

Figure 13.

A random scenario of two persons walking: a) loading function; b) floor response
A random scenario of two persons walking: a) loading function; b) floor response

Figure 14.

Distribution of acceleration response
Distribution of acceleration response

Figure 15.

Cumulative distribution functions of acceleration response
Cumulative distribution functions of acceleration response

Summary of FE results for different walking scenarios

RMS acceleration (m/s2) for
fP2 (Hz) fP1 (Hz)
1.8 1.9 2 2.1 2.2
0 0.0062 0.0163 0.0070 0.0052 0.0071
1.8 0.0107 0.0200 0.0102 0.0080 0.0100
1.9   0.0211 0.0195 0.0167 0.0167
2     0.0082 0.0098 0.0105
2.1       0.0075 0.0089
2.2         0.0075

Summary of response levels

Excitation Maximum aRMs (m/s2) identified by
Experiment FE model Random simulation
One person 0.0159 0.0163 0.0167
Two persons 0.0220 0.0211 0.0216
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