Steel moment frames for earthquakes in United States and Japan

Citation
M. Nakashima et al., Steel moment frames for earthquakes in United States and Japan, J STRUC ENG, 126(8), 2000, pp. 861-868
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
ISSN journal
0733-9445 → ACNP
Volume
126
Issue
8
Year of publication
2000
Pages
861 - 868
Database
ISI
SICI code
0733-9445(200008)126:8<861:SMFFEI>2.0.ZU;2-K
Abstract
Steel moment frames are used for seismic design in the United States and Ja pan and are highly regarded structural systems, but severe damage to steel frames occurred during the 1994 Northridge and 1995 Hyogoken-Nanbu earthqua kes. Examination of similarities and differences in the engineering researc h and practice for these frames in the two countries provides insight into this important seismic issue. A brief history of the engineering practice i n both countries is provided, and current practice and design methods are s ummarized and compared. The evolution of structural systems and the details and practices employed in the two countries are described. Damage from pas t earthquakes is briefly reviewed. Welding processes and material behavior are also compared, because they influence the seismic behavior of these sys tems. Many U.S. engineers believe that Japanese buildings are much stiffer and stronger but less ductile than comparable U.S. buildings. It will be sh own that this is not always the case. Significant differences in U.S. and J apanese design practices will be shown, but even greater similarities in ou r structures and design procedures will be noted. As a consequence, this pa per should help engineers from both countries learn from one another.