Background for Preliminary Expected Future Loss Computations. Optimum Seismic Protection for New Building Construction in Eastern Metropolitan Areas

摘要

An example of expected future seismic loss computation together with suggested damage status and earthquake intensity categories for the Boston area are reported. The probabilities used in the example were chosen for illustrative purposes and no claim is made that they are reliable for the Boston area. The major components of uncertainty in the analysis of seismic design is the uncertainty of the effects of each earthquake on the structural system studies. A computational analysis model is proposed which relates damaged probabilities to Modified Mercalli intensities and to scatter in acceleration vs. intensity data. Damage state categories are based on probabilities for 8 to 13-story structures founded on firm ground and designed according to Boston building code requirements. A table of suggested damage states provides initial estimates which might apply for a particular type of building on firm ground in Boston.