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

Figure 7

Schematic snapshots showing the main front (), the reflected field (continuous line in through ), and the cylindrical diffracted waves up to 3rd order ( through ). At the incident front is first order diffracted by point . Subsequently this same front experiences first-order diffraction by points and at , while the initially formed cylindrical front experiences second-order diffraction at these points. Similarly, a third-order diffraction event produced by point is identified in .