Seismic Design System of RC Structures Based on Performance Check

(1)将考虑双向裂缝的钢筋混凝土本构模型改进为考虑四向裂缝的钢筋混凝土本构模型。进行了三向裂纹圆柱试件的循环剪切试验。通过与实验结果的对比，验证了本构模型的准确性。(2)将结构体划分为钢筋混凝土区和素混凝土区，将双向配筋的混凝土受拉刚化模型推广到包括局部配筋的所有结构。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保护层混凝土受剪区的两倍。最后，利用该数值进行三维非线性分析，估算考虑尺寸效应的受剪承载力，评价大损伤范围内的抗震性能。(3)输入地震波预测系统从场地、土壤、 ...更多信息 基地和地震中心已基本建成。利用该方法和三维非线性分析方法，对兵库县南部地震中钢筋混凝土框架铁路结构进行了损伤分析，通过真实的损伤与分析结果的对比，验证了结构的可靠性。结果表明，为了掌握钢筋混凝土结构的抗震性能，三维分析是不可避免的，材料强度的评估对于包括剪切破坏在内的损伤分析是重要的。(4)作为既有钢筋混凝土结构抗弯加固的施工方法，提出了预埋加固钢筋和粘贴钢板的加固方法，并对加固效果进行了试验研究。发展锚法加固钢筋或板已成为解决梁柱连接处负弯矩问题的重要课题。通过真实的尺寸试验，对抗弯承载力进行了校核.结果表明，在保持原有结构形式的基础上，可提高处理能力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