Improvement of Structural Safety against Near-Field Earthquake in Urban Areas

这项研究的目的是(A)考虑兵库县南部地震期间强地面运动的特点，调查建筑物、高架公路和桥梁、铁路立交桥的结构破坏原因；(B)研究神户市地铁等地下结构严重破坏的原因；(C)开发使用响应控制装置的新的先进民用基础设施，并建立重要角色的抗震结构的新设计。1.薄壁钢桥墩的弹塑性地震反应和损伤预测；2.考虑约束混凝土本构模型和简化剪切设计方程的杆件受力-挠度预测的新数学模型；3.温度和应变率对结构钢断裂韧性的影响；4.橡胶减震装置对桥梁的先进防脱；基础隔震体系橡胶叠层支座力学性能预测模型的建立；5.竖向激励楼板竖向振动对钢筋混凝土框架结构非线性结构响应的影响。6.编制了适用于地下结构的含多向裂纹钢筋混凝土结构的动力非线性有限元程序。

The objectives of the research are (a) to investigate the cause of structural damage in buildings, elevated highway and bridges, railway overpasses, considering the characteristics of strong ground motion during the hyogo-Ken Nanbu Earthquake, (b) to study the cause of heavy damage in underground structures such as the subway in Kobe City and (c) to develop new advanced civil infra-facilities using response control devices and to establish a new design for earthquake resistant structures of important roles.The final research results includes ; 1. prediction of inelastic seismic response and damage of thin-walled steel bridge piers, 2. new mathematical model for predicting member force-deflection relation considering constitutive model developed for confined concrete as well as simple shear design equations, 3. effect of temperature and strain rate on fracture toughness of structural steel, 4. advanced unseating prevention of bridge by shock absorbing device made of rubber, and development of model predicting mechanical properties of rubber laminated bearing for base isolation system, 5. effect of vertical vibration of floor slab by vertical excitation on non-linear structural response of R/C frame structure, and 6. development of dynamic nonlinear FEM program dealing with R/C structures with multi-directional cracks applicable to under ground structure.