Seismic Design System of RC Structures Based on Performance Check

基于性能校核的RC结构抗震设计系统

• 批准号: 09355014
• 负责人: OKAMURA Hajime
• 金额: $ 18.75万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09355014/
• 关键词: RC Structures; Crack, Shear Failure; Size Effect; 3D Nonlinear Analysis; Seismic Damaged Analysis; Seismic Retrofitting; 耐震補強; 3次元非線形数値解析; 接合部耐震補強; 靱性; 耐震性能; 鉄筋コンクリート; ねじり; 設計地震動; かぶり

(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

(1)对考虑两个方向裂缝的钢筋混凝土本构模型进行了改进，进行了三方向或(我们方向)裂缝圆柱试件的四方向循环剪切加载试验。通过实验与解析结果的比较， (2)将结构体积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面板的混凝土抗拉刚化模型推广到所有结构，包括通过不同尺寸柱的试验，直观地验证了钢筋混凝土的受剪区域是保护层混凝土的两倍，最后利用该值进行了三维非线性分析，估算了受剪承载力的尺寸效应并进行了抗震评价。 (3)建立了基于位置、土壤、基础和地震中心的输入地震波预测系统，并利用该系统和3D非线性分析对RC框架铁路进行损伤分析。为了通过实际损伤与分析结果的比较来检查结构的可靠性，我们对兵库县南部地震中的结构进行了研究，结果证明，3D 分析对于掌握 RC 结构的抗震性能是不可避免的，并且可以进行评估。材料强度对于包括剪切破坏在内的损伤分析很重要。(4)作为现有钢筋混凝土结构的弯曲加固施工方法，已经开发了预埋加固钢筋和钢板粘结方法，并通过实验研究了锚固方法的有效性。梁柱连接部位的负弯矩改造成为重要课题，通过实际尺寸的试验验证，在保持原结构的情况下，可提高30%的承载力。形式.Less

项目成果

Okamura,H.: "Size effect and failure of RC structures under earthquake" 3rd International Conference on Fracture Mechanics of Concrete and Concrete Structures,FRAMCOS-3,Gifu,Japan. 1263-1278 (1998)

Okamura,H.：“地震下 RC 结构的尺寸效应和失效”第三届混凝土和混凝土结构断裂力学国际会议，FRAMCOS-3，日本岐阜。

福浦,尚之: "RC非線形解析に用いる鉄筋の繰り返し履歴モデル" 土木学会論文集. No.564/V-35. 291-296 (1997)

Fukuura, Naoyuki：“RC 非线性分析中使用的钢筋的重复历史模型”，日本土木工程师协会会刊，第 564/V-35 号（1997 年）。

MAEKAWA,K.: "Path-dependent three-dimensional constitutive laws of reinforced concrete-formulation and experimental verification" Structural Engg.and Mechanics. Vol.5, No.6. 743-754 (1997)

MAEKAWA,K.：“钢筋混凝土的路径相关三维本构定律 - 配方和实验验证”《结构工程与力学》。

SALEM,H.: "Coupled bond and bridging stress transfer in cracked reinforced concrete" Proc.of 3rd International Conference on Fracture Mechanics of Concrete and Concrete Structures (FRAMCOS-3). Vol.2. 1353-1362 (1998)

SALEM,H.：“开裂钢筋混凝土中的耦合粘结和桥接应力传递”第三届混凝土和混凝土结构断裂力学国际会议 (FRAMCOS-3) 的会议记录。

東原紘道: "既往の地震動記録に基づいた免責構造の照査用地震動時刻歴の生成について" 土木学会第1回免震・制震コロキウム講演論文集. 377-382 (1996)

Hiromichi Higashihara：“根据过去的地震运动记录生成用于检查豁免结构的地震运动时间历史”，第一届地震隔离与控制研讨会论文集，日本土木工程师学会 377-382 (1996)。