Studies on the Seismic Design of Low-Rise Steel Buildings.

摘要

The seismic analysis and earthquake resistant design of steel low-rise shear buildings,moment frame buildings,and x-braced frame buildings are studied. A number of two-and three-story buildings were designed according to the recommendations of modern building codes. The forces and deformations generated in the buildings under the North-South component of the El Centro 1940earthquake were assessed by means of time-history analysis. It was found that the base story was the critical link in the lateral seismic load resisting system for the shear buildings,the moment frame buildings proportioned with weak columns,and the x-braced buildings considered. Two simpler methods of analysis,the modal method used in conjunction with inelastic response spectra and the quasi-static building code approach modified to explicitly taking inelastic behavior into account,were evaluated for use in calculating response quantities. The authors concluded that the quasi-static building code approach is the most appropriate procedure for use in the practical design of low-rise steel buildings of the types considered. Finally,the application of the results of these studies to the practical design of low-rise steel buildings is discussed.