This presentation provides two high rise buildings response due to Seismic and Wind events using Accelerometers at the top and bottom of the buildings

1. Structural Health Monitoring
For
High Rise Building
due to Wind & Seismic Events

2. Monitoring
System
Setup in the
Sail@Marina
for the Two
Towers

3. Monitoring
Setup in the
Sail@Marina
for Two
Towers

4. Building Movements
Events due to
Earthquakes and Wind
30 September 2009 6:16PM due to Seismic
24 July 2010 10:58 AM due to Seismic
27 July 2009 5:20 PM due to Wind

5. Mode shapes from Republic Plaza
from Ambient Tests

6. 1. Earthquake Event Details
The 2009 Sumatra earthquakes
occurred just off the southern
coast of Sumatra, Indonesia. The
major shock hit at 17:16:10 local
time on September 30, 2009
(10:16:10 UTC)
Singapore time:
30 September 2009 06:16PM
Latitude : 0.8 S
Longitude: 99.93 E
Magnitude: 7.9
Region: SOUTHERN SUMATERA
map: wikimapia

7. Direction &
Location Details
Tower1 and
Tower2 sensors
got triggered by the
Sumatra
earthquake.
Trigger Time:
30/09/2009 06:56
PM
N-S
N-S
E-W
E-W
1st 2nd

8. Tower
responses
Tower1:
Peak Frequency response is 0
.9 Hz.
Tower1 wind sensor shows
there is no wind during the
event.
Tower2:
Peak Frequency response is1.
0 Hz.
Tower2 wind sensor also not
registered any significant wind
during the event.
TOWER 2
Upper Level
North-South
Lower Level
North-South
Upper Level
East-West
Lower Level
East-West
Vibration (Hz): 1.0 1.0 1.0 1.0
Max Acceleration (g):
With BPF (0.05Hz - 10.00Hz)
0.012 0.003 0.012 0.003
Max ground displacement
(cm):
1.4 0.8 1.8 0.6
TOWER 1
Upper Level
North-South
Lower Level
North-South
Upper Level
East-West
Lower Level
East-West
Vibration (Hz): 0.9 0.9 0.9 0.8
Max Acceleration (g):
With BPF (0.05Hz - 10.00Hz)
0.008 0.002 0.006 0.002
Max ground displacement
(cm):
1.6 0.4 1.2 0.4

9. Acceleration and
Frequency
Tower: 1 @ Level: 68
Direction:
North - South
Max Acceleration:
8mg
Peak frequency :
0.9Hz Frequency[Hz]
54.84.64.44.243.83.63.43.232.82.62.42.221.81.61.41.210.80.60.40.20
FourierAmplitude
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
Time [sec]
1601501401301201101009080706050403020100
Acceleration[g]
0.012
0.010
0.008
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
-0.012

10. Tower: 1@ Level: 68
Direction:
East - West
Max Acceleration:
5mg
Peak frequency :
0.9Hz Frequency[Hz]
54.84.64.44.243.83.63.43.232.82.62.42.221.81.61.41.210.80.60.40.20
FourierAmplitude
0.30
0.28
0.26
0.24
0.22
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
Time [sec]
1601501401301201101009080706050403020100
Acceleration[g]
0.012
0.010
0.008
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
-0.012
Acceleration and
Frequency

11. Tower: 2@ Level: 62
Direction:
North - South
Max Acceleration:
12mg
Peak frequency :
1Hz
Frequency[Hz]
54.84.64.44.243.83.63.43.232.82.62.42.221.81.61.41.210.80.60.40.20
FourierAmplitude
0.300
0.280
0.260
0.240
0.220
0.200
0.180
0.160
0.140
0.120
0.100
0.080
0.060
0.040
0.020
Time [sec]
1501401301201101009080706050403020100
Acceleration[g]
0.014
0.012
0.010
0.008
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
-0.012
-0.014
Acceleration and
Frequency

12. Tower: 2 @Level: 62
Direction:
East - West
Max Acceleration:
12mg
Peak Frequency :
1Hz
Time [sec]
1501401301201101009080706050403020100
Acceleration[g]
0.014
0.012
0.010
0.008
0.006
0.004
0.002
0.000
-0.002
-0.004
-0.006
-0.008
-0.010
-0.012
-0.014
Frequency[Hz]
54.84.64.44.243.83.63.43.232.82.62.42.221.81.61.41.210.80.60.40.20
FourierAmplitude
0.300
0.280
0.260
0.240
0.220
0.200
0.180
0.160
0.140
0.120
0.100
0.080
0.060
0.040
0.020
Acceleration and
Frequency

13. The 2010 Sumatra
earthquakes occurred just off
the north coast of Sumatra,
Indonesia. The major shock
hit at 9:11 AM local time on
July 24, 2010 (2:11 UTC)
Singapore time: 24 July 2010
10:11AM
Latitude : 1.15 N
Longitude: 99.72 E
Magnitude: 6.26
Region: NORTHERN
SUMATERA
map: wikimapia
2. Earthquake Event Details

14. Tower1 and Tower2
sensors got triggered
by the Sumatra
earthquake.
Trigger Time: 24 July
2010 10:58 AM
Direction &
Location Details
N-S
N-S
E-W
E-W
1st 2nd

15. Tower1:
Peak Frequency response is
0.85Hz.
Tower1 wind sensor shows there
is no wind during the event.
Tower2:
Peak Frequency response is
1.1 Hz.
Tower2 wind sensor also not
registered any significant wind
during the event.
Tower2 lower level sensor didn’t
trigger for this event.
Tower 1
Upper Level
North-South
Lower Level
North-South
Upper Level
East-West
Lower Level
East-West
Vibration (Hz): 0.850 1.10 0.848 1.15
Max Acceleration (g):
With BPF (0.05Hz - 5.00Hz)
0.003 0.001 0.002 0.001
Max ground displacement
(cm):
0.30 0.15 0.20 0.20
Tower2
Upper Level
North-South
Lower Level
North-South
Upper Level
East-West
Lower Level
East-West
Vibration (Hz): 1.2 -- 1.10 --
Max Acceleration (g):
With BPF (0.05Hz - 5.00Hz)
0.0015 -- 0.0015 --
Max ground displacement
(cm):
0.15 -- 0.20 --
Tower
responses

16. Tower: 1 @ Level: 68
Direction:
North - South
Max Acceleration:
3mg
Peak frequency :
0.9Hz Frequency [Hz]
21.81.61.41.210.80.60.40.20
FourierAmplitude
0.05
0.04
0.03
0.02
0.01
0
Time [sec]
1601501401301201101009080706050403020100
Acceleration[g]
0.004
0.003
0.002
0.001
0
-0.001
-0.002
-0.003
Acceleration and
Frequency

17. Tower: 1@ Level: 68
Direction:
East - west
Max Acceleration:
2mg
Peak frequency :
0.9Hz Frequency [Hz]
21.81.61.41.210.80.60.40.20
FourierAmplitude
0.05
0.04
0.03
0.02
0.01
0
Time [sec]
1601501401301201101009080706050403020100
Acceleration[g]
0.002
0.001
0
-0.001
-0.002
Acceleration and
Frequency

18. Tower: 2@Level: 62
Direction:
North - South
Max Acceleration:
2mg
Peak Frequency :
1.2 Hz
Frequency [Hz]
21.81.61.41.210.80.60.40.20
FourierAmplitude
0.02
0.018
0.016
0.014
0.012
0.01
0.008
0.006
0.004
0.002
0
Time [sec]
1501401301201101009080706050403020100
Acceleration[g]
0.002
0.001
0
-0.001
-0.002
Acceleration and
Frequency

19. Tower: 2 @Level: 62
Direction:
East - West
Max Acceleration:
2mg
Peak Frequency :
1.1Hz Frequency [Hz]
21.81.61.41.210.80.60.40.20
FourierAmplitude
0.02
0.018
0.016
0.014
0.012
0.01
0.008
0.006
0.004
0.002
0
Time [sec]
1501401301201101009080706050403020100
Acceleration[g]
0.002
0.001
0
-0.001
-0.002
Acceleration and
Frequency

20. 3. Wind Details
Other than
Earthquakes, Wind
can also cause the
Towers to oscillate.
Tower2 under Wind
condition:
Wind Speed : 12.5 m/s
Wind Direction: 270
(Degree) from West

21. Tower2 sensors got
triggered by the wind.
Trigger Time:
27/07/2009 5:20 PM
Frequency [Hz]
21.91.81.71.61.51.41.31.21.110.90.80.70.60.50.40.30.20.10
FourierAmplitude
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
Frequency [Hz]
21.81.61.41.210.80.60.40.20
FourierAmplitude
0.050
0.045
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
Direction &
Location Details
N-S
E-W

22. Tower2:
Primary Frequency
Response is 0.21 Hz.
Tower2 lower level sensor
didn’t trigger for this event.
Tower1 did not register any
trigger in this period.
Tower 2
Upper Level
North-South
Lower Level
North-South
Upper Level
East-West
Lower Level
East-West
Vibration (Hz): 0.210 -- 0.210 --
Max Acceleration (g):
With BPF (0.05Hz - 5.00Hz)
0.001 -- 0.001 --
Max ground displacement
(cm):
0.515 -- 0.849 --
Tower
responses

23. Tower: 2 @ Level: 62
Direction:
North - South
Max Acceleration:
1mg
Peak Frequency :
0.21Hz
Time [sec]
1601501401301201101009080706050403020100
Acceleration[g]
0.002
0.001
0.000
-0.001
-0.002
Frequency [Hz]
21.91.81.71.61.51.41.31.21.110.90.80.70.60.50.40.30.20.10
FourierAmplitude
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
Acceleration and
Frequency

24. Tower: 2@Level: 62
Direction:
East - West
Max Acceleration:
1mg
Peak Frequency :
0.21Hz
Frequency [Hz]
21.81.61.41.210.80.60.40.20
FourierAmplitude
0.050
0.045
0.040
0.035
0.030
0.025
0.020
0.015
0.010
0.005
Time [sec]
1601501401301201101009080706050403020100
Acceleration[g]
0.002
0.001
0.000
-0.001
-0.002
Acceleration and
Frequency