chapter  10
Seismic Design by Rigid-Plastic Dynamics
Pages 28

In most cases in practice it is common to use methods based on elastic theory for seismic design. These methods are problematic for several reasons, the most serious one being, that it is expensive to design a structure to withstand a severe earthquake with stresses within the elastic range. To remedy this problem, empirical factors, normally unrelated to the physical nature of the problem at hand, are used to take into account possible ductile behavior of the materials.