Seismic Design System of RC Structures Based on Performance Check

(1)改进了考虑两个方向裂缝的钢筋混凝土本构模型，改进了考虑四个方向裂缝的钢筋混凝土本构模型。进行了三、两方向裂纹圆柱试件的循环剪切加载试验。通过实验与分析结果的比较，验证了本构模型的准确性。(2)将结构体积划分为钢筋混凝土区和素混凝土区，将两个方向上有足够钢筋的板的混凝土张拉加筋模型扩展到包括钢筋局部布置在内的所有结构。通过不同尺寸柱的试验，直观地验证了钢筋混凝土受剪区是覆盖混凝土的两倍。最后利用该值进行了三维非线性分析，可进行具有尺寸效应的抗剪承载力估算和广阔损伤场下的抗震性能评价。(3)从位置、土壤、地基和地震中心输入地震波预测系统已基本建立。利用该方法和三维非线性分析方法，对兵古肯南部地震中钢筋混凝土框架铁路结构进行了损伤分析，通过实际损伤与分析结果的对比，验证了结构的可靠性。验证了三维分析对于掌握钢筋混凝土结构的抗震性能是不可避免的，同时也验证了材料强度评估对于包括剪切破坏在内的损伤分析的重要性。(4)作为既有钢筋混凝土结构的挠曲加固施工方法，开发了预埋加固钢筋和钢板粘结剂，并对其有效性进行了试验研究。发展加固杆板锚固法已成为解决梁柱连接处负弯矩问题的重要课题。通过实际尺寸试验验证了弯矩承载力。结果表明，在保持原有结构形式的情况下，承载力可提高30%。少

(1) Reinforced concrete constitutive models considering cracks in two directions have been p Improved for the one in four directions. Cyclic shear loaded experiments of cylinder specimens with cracks in three or (our directions have been conducted. Comparing between experimental and analytical results, accuracy of the constitutive models has been proved.(2) Dividing structure volume into reinforced concrete zone and plain concrete zone, concrete tension-stiffening model for panels with sufficient rebars in two directions has been extended for all structures including localized arrangement of rebars. It is visually verified that reinforced concrete zone for shear is double of cover concrete through experiment of columns of various sizes. Finally 3D nonlinear analysis with this value has been conducted, estimation of shear capacity with size effect and evaluation of seismic performance in the spacious damage field can be done.(3) Input seismic wave predicting system from location, soil, … More base and the seismic center has been established nearly. Using this and 3D nonlinear analysis, damaged analysis of RC framed railway structures in Hyogo-ken Nanbu Earthquake has been conducted in order to check the reliability through comparison between real damages and analytical results. As a result, it is verified that 3D analysis is inevitable to grasp the seismic behaviors of RC structures and that evaluation of achieved material strength is important for damaged analysis including shear failure.(4) As flexure retrofitting construction methods for existing RC structures, embedded retrofitting bars and bond of steel plate have been developed and the effectiveness has been investigated experimentally. Development of anchor method of retrofitting bar or plate has become an important subject for negative moment at connection part of beam and column. Moment capacity has been checked through experimental with real size. As a result, it is verified that the capacity can be increased 30% keeping the former structural form. Less