A Superposition Based Diffraction Technique to Study Site Effects in Earthquake Engineering

Figure 9

Frequency domain response for the V-shaped canyon topography. Column 2 displays frequency-space contour maps for the spatial distribution of the amplitude of the transfer function obtained with a BEM algorithm and with the current SBD technique with up to 3 orders of diffraction. Column 1 shows the amplitude functions at constant locations for different receivers over the canyon surface while columns 3 and 4 display the amplitude function for constant dimensionless frequencies and for receiver over the free surface.

(a)

(b) BEM

(c)

(d)

(e)

(f) 1st-order diffraction

(g)

(h)

(i)

(j) 2nd-order diffraction

(k)

(l)

(m)

(n) 3rd-order diffraction

(o)

(p)