Seismodeck: Response Lab

Seismodeck walks a building through a four-step seismic response screening: Site, Structure, Spectrum, Results. The user enters the site class, the mapped short-period and one-second accelerations, the risk category, and the long-period transition. The structure step takes the lateral system, each story's height, effective weight, and lateral stiffness, and a fundamental period from the approximate formula or from the user's own analysis model. The spectrum step draws the design response spectrum with the building period marked and lists the site coefficients and corner periods; values from a site-specific study can replace the mapped ones. The results step reports the seismic response coefficient with the bound that governs it, base shear, the story force distribution, story shears, design story drift against the allowable limit, the P-delta stability coefficient, and a checklist of…