NEHRP Clearinghouse

Title
Costs of Reinforcing Existing Buildings and Constructing New Buildings to Meet Earthquake Codes.
File
PB259189.pdf
Author(s)
Larrabee, R. D.; Whitman, R. V.
Source
National Science Foundation, Washington, D.C. Research Applied to National Needs., June 1976, 90 p.
Identifying Number(s)
MIT-CE-R76-25
Abstract
The costs of constructing new buildings to seismic codes are reviewed. A particular building, designed with and without seismic load is examined; design for seismic load increased with total cost 2.8 percent. Some impacts of the implementation of a new seismic code are discussed. Methods of reinforcing existing buildings are discussed. Estimated costs for reinforcing 156 buildings are presented. Reinforcing costs are on the order of $5 to $18 per square foot for masonry bearing wall buildings. Costs are lower for other structural types or buildings with previous seismic design. Costs are higher for older buildings, smaller buildings and historic buildings. The percentage of older existing buildings is estimated; an examination of U.S. codes illustrates how few existing buildings were designed for seismic load.
Keywords
Economic impact; Ground motion; Buildings; Building codes; Earthquake engineering; Earthquake resistant structures; Economic analysis; Seismic design; Seismic design decision analysis; Construction costs; Design criteria; Safety factor; Seismic risk