SEISMIC DESIGN PROCEDURES FOR SOIL-STRUCTURE INTERACTION

(1)为了研究内陆型地震运动，应用位错理论对断层断裂力学进行了分析。将模拟结果与历次强震观测资料进行了对比。针对冲积层与冲积层边界的不规则性，研究了冲积层的地震波放大问题。结合神户地震，阐明了地震波的干扰机理。(3)针对神户南武地震的地面脉动，对钢筋混凝土结构施加一定的脉冲荷载，以解释本构混凝土构件内部的应力传递。对桥墩进行了分析，考虑了钢筋混凝土构件和土体的非线性行为。在响应评估中考虑了土-结构动力相互作用。从延性和滞回重复性两个方面对震害因素进行了评估。(5)考虑邻近土体的非线性特性，对地下结构进行了分析。

(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.