Optimum Design to Resist Earthquakes

by Emilio Rosenblueth, (F.ASCE), Prof. of Engrg.; Universided Nacional Autonoma de Mexico, Mexico, D.F., Mexico,

Serial Information: Journal of the Engineering Mechanics Division, 1979, Vol. 105, Issue 1, Pg. 159-176

Document Type: Journal Paper


Optimization is taken as minimization of the sum of expected present values of initial costs (including engineering services and construction) and (magnified) losses due to a structure's entrance into limit states. Dead, live, and seismic loads are considered. Attention is given to optimum repair and reconstruction policies; this problem is formally identical with optimization of resource allocation to research and development. Expenditures in engineering services are taken here as a constant. Except for uncertainty about maximum possible seismic intensity, uncertainties call for approximately multiplicative safety factors. Under some conditions design live loads under earthquake exceed that under gravity alone.

Subject Headings: Seismic loads | Seismic design | Earthquakes | Professional services | Seismic tests | Live loads | Uncertainty principles | Gravity loads

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