Earthquake-resistant ability of low or middle rise steel building structures

Part.2 Earthquake-resistant ability of the investigated structures

Abstract

ABSTRACT This paper is a study of earthquake-resistant ability of 75 existing low and middle rise steel buildings. Outline of the investigated structures was reported in part.1. The main items of the investigation about earthquake-resistant ability are the story drift angle at the base shear coefficient"Co"=0.2, story stiffness ratio and horizontal load-carrying capacity. The story drift angle of almost all those buildings are smaller than 1/200. The story stiffness ratio of all buildings are larger than 0.6. The horizontal load-carrying capacity Qu/Qun are larger than 1.0 in 80% buildings. Consequently, almost surveyed buildings earthquake-resistant ability satisfied the demand of the conditions of route-3 defined at the Building Standard Low.