せん断変形をうける部材のエネルギ吸収に関する有効性と形状保持を目的とした座屈解析

抄録

Recently, many new technologies developments relating to seismic design of bridge piers against earthquakes have been proposed due to improved analysis techniques. From this, the seismic performance of the pier has been improved. When force of an earthquake is generated in the pier of a ramen structure, bending failure occurs at the base and shear deformation occurs at the center of the beam. Normally, metal materials can absorb the energy by being plasticized from earthquakes. However, when shear buckling is happened, the hysteresis of the material can not be maintained and the amount of energy absorption decreases. In this research, focusing on the ramen structure, we aim at establish a nonlinear finite element method analysis technique for shear buckling by three-dimensional elasto-plastic dynamic response analysis for the earthquakes. Then, materials with low stress and high ductility are installed in the central part of the beam as a fail-safe, and reinforcement is carried out with the stiffener. From this reason, energy can be absorbed and destruction can be limited by resist shear deformation.