Seismic Design of Tall Structures Considering Anchor Bolt Yielding. Problem Orientation and Seismic Design Loading.

Abstract

This paper deals with the seismic design of tall structures by considering anchor bolt yielding. During earthquakes, the anchor bolts for fixing tall structures elongate due to the severe vibration of the structures caused by the strong ground shaking. The load-deformation curve of the center of gravity of the tall structure draws elasto-plastic hysteresis loops as a result of the elongation of the anchor bolts. Energy dissipation due to the hysteresis loop of the load-deformation curve can generally be considered in the seismic load evaluation. In order to evaluate the seismic load reduction due to the energy dissipation of yield members of the tall structures, the following have been carried out in this study: (1) investigation of the previous typical studies on nonelastic seismic design; (2) investigation of the relation between the structural type, yield mechanism and the deformation-restoring force characteristics; (3) analysis of the structural responses and of the seismic load reduction for the tall structures.