ABSTRACT
Seismic design involves two distinct steps — determining (or estimating) the forces that will act on
a structure and designing the structure so as to both resist these forces and keep deflections within
prescribed limits. This chapter provides a basic explanation of the seismic design of buildings, by first
discussing how earthquake forces are caused in buildings and the systems that have been developed
to deal with these forces, then reviewing the most common types of buildings and their typical
seismic performance, then discussing selected key aspects of seismic design, and, finally, discussing the
force-determination aspect currently used in building codes.