Micro Seismic Hazard Analysis

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Effect of transfer function onAmplitude spectrum0.050N. Brasilia - Layer 1 - CCALA EW0.045Layer No. 10.040Surface levelFourier Amplitude Spectrum0.0350.0300.0250.0200.0150.0100.0050.0000 2 4 6 8Frequency (Hz)Transfer functionFigure 1. Fourier amplitude spectrum for CCALA signal - EW component, surface level.0.050ON Soil profile - <strong>Analysis</strong> No. 1 - Profile No. 10.045Layer No. 40.040Base level(Bedrock)Fourier Amplitude Spectrum0.0350.0300.0250.0200.0150.0100.0050.0000 2 4 6 8Frequency (Hz)Figure 2. Fourier amplitude spectrum for CCALA signal- EW component,, base level.
Approach to simulate the non-linearbehaviour of soils• Complex transfer function only valid forlinear behaviour of soils• Linear approach must be modified toaccount for the non-linear behaviour ofsoils
Page 3 and 4: Basic physical concepts and definit
Page 7 and 8: Site effects due to low stiffness s
Page 9: Site effects due to low stiffness s
Page 12 and 13: Characteristic site period• The p
Page 14 and 15: Natural frequency of buildings• A
Page 16 and 17: Examples of natural frequencies ofb
Page 18 and 19: Vertical standing waves• Vertical
Page 20 and 21: Summarising: building resonance and
Page 22 and 23: Soft ground effect - summary• Sof
Page 24 and 25: MichoacanearthquakeCollapsed 21-Sto
Page 26 and 27: Theoretical methods• Numerical me
Page 28 and 29: How do we carry out a groundrespons
Page 30 and 31: What do we use to quantify theexpec
Page 32 and 33: SHAKE• The equivalent linear appr
Page 34 and 35: 1D ground response analysisAssumpti
Page 36 and 37: Transfer Function as technique for
Page 38 and 39: Define the transfer function (2)•
Page 42 and 43: Procedure to account for nonlineari
Page 44 and 45: General, simplified profile as assu
Page 46 and 47: Standard Spectral Ratio Technique (
Page 48 and 49: Nakamura’s or H/V method (1)• S
Page 50 and 51: Nakumura’s or H/V method (3)• M
Page 52: Nakumura’s or H/V method (5)• I
Page 55 and 56: Site effects due to surface topogra
Page 57 and 58: Liquefaction
Page 59 and 60: Liquefaction - general (2)• Commo
Page 61 and 62: Liquefaction - governing factors (2
Page 63 and 64: Liquefaction - governing factors (4
Page 65 and 66: Liquefaction - governing factorssum

Micro Seismic Hazard Analysis

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