Earthquake Resistant Design Analysis and Construction to Registration

Did We not make the earth habitable? And the mountains as pegs? (78:6-7). The purpose of earthquake resistant design is to allow inelastic deformation and structural damage at preferred locations in the structure without endangering structural integrity and to prevent structural collapse during a major earthquake. In general most earthquake code provisions implicitly require that structures be able to resista. Minor Earthquakes without any damage.b. Moderate earthquakes without negligible structural damage and some nonstructural damage.c. Major earthquakes with some structural and some nonstructural damage but without collapse. The structure is capable to undergo fairly large deformations by yielding in some members.Each seismic zone coefficient provides expected peak ground acceleration values on rock/firm soil corresponding to the maximum considered earthquake. The design basis earthquake is taken as 2/3 of maximum considered earthquake.A Code designed structure is thought highly unlikely to collapse under ground motion that is one and one half (1.5) times as strong as the design earthquake ground motion.