- Structural Dynamic 1 (182.94 KiB) Viewed 36 times
Structural Dynamic
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answerhappygod
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Structural Dynamic
Structural Dynamic
1. Using the Strong-motion Virtual Data Centre https://www.strongmotioncenter.org/vdc, https://www.geonet.org.nz, or otherwise; source the ground motion recordings for: A. El Centro, Imperial Valley, USA earthquake, 19-May-1940 04:36 UTC, M7.0 recorded at El Centro, CA - Array Sta 9; Imperial Valley Irrigation District - 302 Commercial. B. 22 February 2011 Christchurch earthquake as recorded at Christchurch Botanical Gardens Station (CBGS). Use N89W component only The 5% and 10% damped response spectra for both events are presented in the figures below. Spectral acceleration - Elcentro NS Spectral acceleration - 2011 Christchurch EQ-CBGS 1.6 0.9 5% 10% E = 5% 10% 1.4 0.8 1.2 0.7 0.6 Spectral Acceleration (g) 0.5 Spectral Acceleration (9) 0.8 0.4 0.6 0.4 0.21 0.2 0.1 0 0 0.2 0.4 0.6 1.4 1.6 1.8 2 0 0 0.2 0.4 0.6 1.4 1.6 1.8 2 0.8 1 1.2 Period (s) 0.8 1 1.2 Period (s) a. Describe the steps you have taken to source the raw ground motion record, and plot the acceleration time histories for both earthquakes [2%] b. For the two events respectively, comment on the seismic demand and likely damage caused to, i. A two-storey timber residential house constructed in early 2000s. ii. Three storey unreinforced building constructed in 1930s. iii. A 10 storey reinforced concrete building constructed in 1980s. iv. A 20-storey high-rise building constructed in 2020. Assume buildings followed NZ construction standards of the time, and buildings are constructed where the ground motion was recorded. Provide your reasoning based on the ground motion characteristics (e.g. peak amplitudes, frequency content, duration) and any other factors you deem relevant.
1. Using the Strong-motion Virtual Data Centre https://www.strongmotioncenter.org/vdc, https://www.geonet.org.nz, or otherwise; source the ground motion recordings for: A. El Centro, Imperial Valley, USA earthquake, 19-May-1940 04:36 UTC, M7.0 recorded at El Centro, CA - Array Sta 9; Imperial Valley Irrigation District - 302 Commercial. B. 22 February 2011 Christchurch earthquake as recorded at Christchurch Botanical Gardens Station (CBGS). Use N89W component only The 5% and 10% damped response spectra for both events are presented in the figures below. Spectral acceleration - Elcentro NS Spectral acceleration - 2011 Christchurch EQ-CBGS 1.6 0.9 5% 10% E = 5% 10% 1.4 0.8 1.2 0.7 0.6 Spectral Acceleration (g) 0.5 Spectral Acceleration (9) 0.8 0.4 0.6 0.4 0.21 0.2 0.1 0 0 0.2 0.4 0.6 1.4 1.6 1.8 2 0 0 0.2 0.4 0.6 1.4 1.6 1.8 2 0.8 1 1.2 Period (s) 0.8 1 1.2 Period (s) a. Describe the steps you have taken to source the raw ground motion record, and plot the acceleration time histories for both earthquakes [2%] b. For the two events respectively, comment on the seismic demand and likely damage caused to, i. A two-storey timber residential house constructed in early 2000s. ii. Three storey unreinforced building constructed in 1930s. iii. A 10 storey reinforced concrete building constructed in 1980s. iv. A 20-storey high-rise building constructed in 2020. Assume buildings followed NZ construction standards of the time, and buildings are constructed where the ground motion was recorded. Provide your reasoning based on the ground motion characteristics (e.g. peak amplitudes, frequency content, duration) and any other factors you deem relevant.