Unified Earthquake Response Analysis for Reinforced Concrete Structures

钢筋混凝土结构统一地震反应分析

• 批准号: 01460173
• 负责人: MACHIDA Atsuhiko
• 金额: $ 4.22万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01460173/
• 关键词: Reinforced Concrete Structure; Inelastic Earthquake Response Analysis; Segment; Moment Curvature Relationship; Constitutive Law; Clough Model; Shear Rigidity; Synthetic Earthquake; せん断剛性; 地震応答解析法; 弾塑性応答; 復元力モデル; 地震応答解析; 鉄筋コンクリ-ト; 応力ーひずみ関係

(1) A program for inelastic earthquake response analysis of reinforced concrete structures has been developed, in which the restoring forces of the members are determined based on stress-strain relationship of the materials. This program can be applied to rather simple structures such as single-column type piers. However, because of the long computation time needed, the program is not practical for complicated structures such as rigid-frame type structures.(2) A second program has been developed in which each member of a structure is divided into segments ; and within a segment, the same moment-curvature relationship is assumed. With this idealization, this program can be practically applied to complicated structures.(3) In the case of adopting Clough hysteresis model as the moment-curvature relationship in the second program using the proper load-carrying capacities and taking the segment lengths to be equal to the lengths of the plastic hinges, the results given by the second program … More agree well with experimental results of shaking-table tests and pseudodynamic tests in the range before the decrease of load-carrying capacities. Even after the load-carrying capacities have decreased, the response can still be determined accurately by the program as long as the curvature in the reduced load-carrying capacity is taken into account in the moment-curvature relationship.(4) When shear cracks occurs after flexural yielding, the procedure of lowering the load-carrying capacity in the moment-curvature relationship does not necessarily reflect the true nature of the phenomenon. Strictly speaking, the shear rigidity should also be decreased accordingly. This is an area of research that needs further investigation.(5) The elapsed time when the maximum acceleration occurs and also the number of times of acceleration with amplitude close to the maximum value have significant influence on the response of reinforced concrete structures. This should be taken into account in generating the synthetic earthquake for use in response analysis. Less

(1)本文编制了钢筋混凝土结构弹塑性地震反应分析程序，该程序根据材料的应力-应变关系确定构件的恢复力。该程序可用于比较简单的结构，如单柱式桥墩。然而，由于计算时间长，该程序不适用于复杂的结构，如刚架结构。(2)第二个程序已经开发，其中每个构件的结构被划分为段，并在一个段内，相同的弯矩曲率关系被假定。有了这种理想化，该程序就可以实际应用于复杂结构。(3)在第二种程序中弯矩-曲率关系采用Clough滞回模型，并采用适当的承载力，且假定梁段长度等于塑性铰长度的情况下， ...更多信息 在承载力下降前的范围内，与振动台试验和拟动力试验结果吻合较好。即使在承载能力降低之后，只要在弯矩-曲率关系中考虑了降低承载能力中的曲率，程序仍然可以准确地确定响应。(4)当弯曲屈服后出现剪切裂缝时，弯矩-曲率关系中承载能力降低的过程并不一定反映该现象的真实性质。严格地说，剪切刚度也应相应地减小。这是一个需要进一步调查的研究领域。(5)最大加速度出现的时间和幅值接近最大值的加速度次数对钢筋混凝土结构的响应有显著影响。在生成用于反应分析的合成地震时应考虑这一点。少

项目成果

大場 新哉: "材料の応力ー歪関係に基づいたRC部材の地震応答解析手法に関する研究" 土木学会第45回年次学術講演会講演概要集. 45ーV. 656-657 (1990)

Shinya Ohba：“基于材料应力-应变关系的RC构件地震反应分析方法的研究”日本土木工程学会第45届学术年会摘要45-V 656-657。

貞末 和宏: "RC2層ラ-メン橋脚における中層梁に着目した仮動的実験に関する研究" コンクリ-ト工学年次論文報告集. 14. (1992)

定末一宏：《以RC二层刚架桥墩中层梁为重点的拟动力实验研究》混凝土工程年论文报告14。（1992）

Kazuhiro Sadasue: "Inelastic Earthquake Response of R/C Frame Piers Considering Ductility of The Members" Pre-print of 46th Annual Meeting of JSCE. 46-V. 756-757 (1991)

Kazuhiro Sadasue：“考虑构件延展性的 R/C 框架墩的非弹性地震响应”JSCE 第 46 届年会预印本。

大場,睦好,町田: "材料の応力ーひずみモデルに基づくRC部材の応答解析" 土木学会年次学術講演会. (1990)

Ohba、Mutsuyoshi、Machida：“基于材料应力应变模型的 RC 构件响应分析”日本土木工程学会学术年会（1990 年）。

A.machida: "Evaluation of Ductility of R/C Members and Influence of Ductibity on Inelastic Response Behaviour of R/C Frome Stractures" Preliminary Proceedings of International Worksbop on Concrete Shear in Earthquake. III. 1-10 (1991)

A.machida：“R/C 构件延展性的评估以及延展性对 R/C Frome 结构非弹性响应行为的影响”国际地震混凝土剪力工作组初步论文集。