D y n a m i c characteristics and wind induced response of a steel frame tower

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Gambar

Fig. 1. (a) General arrangement of the Prospect tower. (b) Mass distribution as modelled by STRAND6
Fig 1 a General arrangement of the Prospect tower b Mass distribution as modelled by STRAND6 . View in document p.2
Fig. 2. Power spectra of acceleration.

Fig 2.

Power spectra of acceleration . View in document p.4
Fig. 3. Computed and measured mode shapes.

Fig 3.

Computed and measured mode shapes . View in document p.5
Fig. 4. Mode 1 Y-Y axis.

Fig 4.

Mode 1 Y Y axis . View in document p.6
Fig. 5. Free vibration decay curves obtained from acceleration records.

Fig 5.

Free vibration decay curves obtained from acceleration records . View in document p.7
Fig. 7. Run test for stationarity using 40 samples.

Fig 7.

Run test for stationarity using 40 samples . View in document p.8
Fig. 6. Free vibration decay mapped, from laser trace.

Fig 6.

Free vibration decay mapped from laser trace . View in document p.8
Fig. 8. Autocorrelation function of first mode acceleration.

Fig 8.

Autocorrelation function of first mode acceleration . View in document p.9
Fig. 9. Time history of tower acceleration, wind speed and direction.

Fig 9.

Time history of tower acceleration wind speed and direction . View in document p.10
Fig. 10. Locus of tower acceleration.

Fig 10.

Locus of tower acceleration . View in document p.11
Fig. 11. Standard deviation of acceleration response versus wind speed fluctuation.

Fig 11.

Standard deviation of acceleration response versus wind speed fluctuation . View in document p.11
Fig. 12. Standard deviation of acceleration response versus lateral turbulence.

Fig 12.

Standard deviation of acceleration response versus lateral turbulence . View in document p.12
Fig. 13. Standard deviation of acceleration response versus mean wind speed. (Before ancillaries were installed.)

Fig 13.

Standard deviation of acceleration response versus mean wind speed Before ancillaries were installed . View in document p.13
Fig. 14. Standard deviation of acceleration response versus mean wind speed. (After ancillaries were installed.)

Fig 14.

Standard deviation of acceleration response versus mean wind speed After ancillaries were installed . View in document p.14
Fig. 16. Turbulence intensity versus mean wind speed.

Fig 16.

Turbulence intensity versus mean wind speed . View in document p.15
Fig. 15. The ratio of along-wind to cross-wind standard deviation of acceleration versus mean wind speed

Fig 15.

The ratio of along wind to cross wind standard deviation of acceleration versus mean wind speed. View in document p.15
Fig. 17. Peak factor versus mean wind speed.

Fig 17.

Peak factor versus mean wind speed . View in document p.16

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