面外繰り返し水平力を受ける逆 L 形鋼製橋脚の強度と変形能に関する研究

Abstract

Various shapes of piers of city highway viaducts in the city are adopted according to the different construction site condition. Invert L-shaped steel piers (ILSP) may cause higher amount of residual displacement after strong earthquake than that of centrally loaded steel piers. In this study, out-of-plane cyclic load test have performed for ILSP under constant vertical load. The eccentricity ratios e/r (e : eccentricity between the center of gravity and vertical load, r : radius of gyration) are selected as 0,2,3. It is found that the influence of e/r on the strength and ductility capacity was investigated. And results of these experiments and elasto-plastic large displacement FEM analysis have compared.