Time-dependent behavior of bond between reinforcement and concrete

钢筋与混凝土之间的粘结随时间变化的行为

• 批准号: 04650522
• 负责人: OHNO Yoshiteru
• 金额: $ 1.41万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650522/
• 关键词: Long-term deflection; Crack width; Sustained loading; Bond creap; Shrinkage; Slippage of steel; Shape of rib; Bond analysis; 鉄筋コンクリート; はり; 鉄筋; コンクリート; 付着応力とすべり関係; 持続載荷; かぶり厚さ

1. Relationship of bond stress-slip between concrete and deformed bar under susutained loading :(1) The relationships between the bond stress and the slip under sustained loading were investigated and modeled based on the result of the prism tests.(2) Time dependent behavior of the distribution of the steel strain and the additional end slips of steels in the prisms were analyzed by using the bond stress-slip model.2. Additional deflection in reinforced concrete contilever beams due to slippage of bar at fixed edge under sustained loading :(1) Bond analysis equations for members on which defferent end bending moment acts were also presented. The analysis used the model of the relationships between bond stress and slip proposed in the part 1. Crack widths and deflections that occured by the slippage of steel were calculated by the bond analysis.(2) The increase in end slip was dominated by shrinkage of concrete and was scarcely influenced by the magnitude of steel stress.(3) The deflection in the cantilever beams increased remarkably within one day of sustained loading. The long-term deflection was influenced significantly by the end slip of steel.(4) Time-dependent behavior of the tension prisms and the cantilever beams was analyzed sufficiently and accurately by considering the change in the relationship between bond stress and slip under sustained loading and creep and shrinkage of concrete.3. A equation of long-term crack width was obtained by the bond analisys : A additional crack width due to creep of compressive concrete, bond creep and shrinkage of concrete between cracks was considered in the equation.

1.持续荷载作用下混凝土与变形钢筋之间的粘结应力-滑移关系：（1）基于棱柱体试验结果，研究了持续荷载作用下混凝土与变形钢筋之间的粘结应力-滑移关系，并建立了模型。(2)采用粘结应力-滑移模型分析了钢筋应变分布和附加端滑移随时间的变化规律.钢筋混凝土悬臂梁在持续荷载作用下由于固边钢筋滑移引起的附加挠度：（1）给出了不同端部弯矩作用下构件的粘结分析方程。分析中使用了第1部分中提出的粘结应力和滑移之间的关系模型。通过粘结分析计算了钢筋滑移引起的裂缝宽度和挠度。(2)端部滑移的增加主要是由混凝土的收缩，几乎不受钢筋应力大小的影响。(3)悬臂梁的挠度在持续加载的一天内显著增加。钢筋端部滑移对长期挠度影响显著。(4)通过考虑持续荷载作用下粘结应力与滑移关系的变化以及混凝土的徐变和收缩，充分准确地分析了受拉棱柱和悬臂梁的时变性能.通过粘结分析，得到了长期裂缝宽度的计算公式：该公式考虑了受压混凝土徐变、粘结徐变和裂缝间混凝土收缩引起的附加裂缝宽度。

项目成果

劉鍵,大野義照,李振宝,鈴木計夫: "持続荷重下における異形鉄筋とコンクリート間の付着応力〜すべり関係(その3影響要因に関する持続載荷実験)" 日本建築学会大会講演梗概集,C(構造II). (1993)

Kei Liu、Yoshiteru Ohno、Zhenbao Li、Keio Suzuki：“持续荷载下变形钢筋与混凝土之间的粘附应力-滑移关系（关于三个影响因素的持续荷载实验）”日本建筑学会会议论文集，C（结构） ）二）（1993）。

Yoshiteru Ohno, Zhenbao Li and Kazuo Suzuki: "Relationships of Bond Stress-Slip Between Concrete and Deformed Bar Under Sustained Loading" Journal of Structual Construction Engineering (Transactions of AIJ). No.467. 111-120 (1994)

Yoshiteru Ohno、Zhenbao Li 和 Kazuo Suzuki：“Relationships of Bond Stress-Slip Between Concrete and Deformed Bar Under Continuous Loading”Journal of Structural Construction Engineering（AIJ 汇刊）。

李振宝,五味久忠,大野義照,鈴木計夫,西永稚一: "鉄筋コンクリートの長期ひび割れ幅の算定" 日本建築学会近畿支部研究報告集. 34. 73-80 (1994)

李金宝、五味久忠、大野义辉、铃木庆男、西永千和：《钢筋混凝土长期裂缝宽度的计算》日本建筑学会近畿分会研究报告34. 73-80 (1994)。

Yoshiteru Ohno, Zhenbao Li and Kazuo Suzuki: "Additional Deflection in Reinforced Concrete Concrete Contilever Beams due to Slippage of Bar at Fixed Edge Under Sustained Loading" Journal of Structual Construction Engineering (Transactions of AIJ). No.467.

Yoshiteru Ohno、Zhenbao Li 和 Kazuo Suzuki：“持续荷载下固定边缘钢筋滑移导致钢筋混凝土混凝土连续臂梁的额外挠度”《结构建筑工程杂志》（AIJ 汇刊）。

大野義照,李振宝,鈴木計夫: "持続荷重下における異形鉄筋とコンクリート間の付着応力-すべり関係" 日本建築学会構造系論文報告集. 459. (1994)

Yoshiteru Ohno、Zhenbao Li、Keio Suzuki：“持续荷载下变形钢筋与混凝土之间的粘附应力-滑移关系”日本建筑学会结构工程学论文集 459。（1994）