SEISMIC DESIGN PROCEDURES FOR SOIL-STRUCTURE INTERACTION

(1)为了研究内陆型地震运动，将断层位错理论应用于层状场地，分析了断层破裂的力学机制。将模拟结果与以往的强震观测资料进行了比较。导出了内陆型地震动的特征。(2)针对冲积土与洪积体边界不规则的特点，研究了其对地震波的放大作用。结合科比案例阐明了波浪干扰机制。(3)针对兵库县南部地震中的冲击地震动，对钢筋混凝土结构施加一定的冲击荷载，以解释混凝土本构构件中的应力传递。强调了拉应力破坏的可能性。(4)桥墩的非线性行为的钢筋混凝土构件以及土壤的分析。考虑土-结构动力相互作用的响应评估。从延性和滞回机理的重复性两个方面对结构的地震损伤因子进行了评估。(5)地下结构的分析考虑了邻近土体的非线性特性。

(1) In order to investigate the inland type earthquake motions, fault rapture mechanics is analyzed by applying the dislocation theory to layred ground. The simulation results are compared with the observation data of past strong motions. Derived is the features of inland type ground motions.(2) Seismic wave amplification is investigated for the alluvium soil in view of the irregular boundary with the diluvium. The wave interference mechanism is clarified in connection with Kobe case.(3) In view of the impulsive ground motions in Hyogoken Nanbu Earthaquqake, certain impulse loads are applied to RC structures in order to interpret the stress transmission within the constitutive concrete members. The possibility of tensile stress failure is stressed.(4) Bridge piers are analyzed with attention to the nonlinear behavior of the reinforced concrete members as well as of the soiles. Dynamic soil-structure interaction is taken into account for the response evaluation. The seismic damage factors are assessed in terms of the ductility and repetition of hysteretic mechanism.(5) Underground structures are analyzed by taking account of the nonlinear characteristic of the neighboring soil.