繰り返し等荷重を受ける逆L形鋼管橋脚の強度と変形性能に関する研究

Abstract

Several types of piers of highway viaduct in the city are adopted depending on the condition of their location. In this study, cyclic loading tests for inverted L-shaped steel tubular pier models are performed. The eccentricity ratios e/r are selected as 0,1,2,3. New cyclic loading test procedure for the pier models with eccentricities is proposed. The cyclic loading tests for the inverted L-shaped steel tubular pier models showed that plastic deformation developed toward the eccentricity, where as the only elastic behavior observed. It can be seen from these test results that the energy absorption ability of the inverted L-shaped piers is extremely inferior to the pier sustaining symmetrical vertical load. Therefore, it should give special consideration to the seismic design of these type piers.