Quantitative Evaluation of Residual Strength and Deformability of Reinforced Concrete Members with Damaged Portion

具有损伤部分的钢筋混凝土构件残余强度和变形能力的定量评价

• 批准号: 13650531
• 负责人: KAWAGUCHI Naotaka
• 金额: $ 0.7万
• 依托单位: Kokushikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650531/
• 关键词: reinforced concrete; FRP; eccentric tension; eccentric compression; bending; torsion; cyclic loading; residual strength; 疲労; 繰り返し; 破壊; 変形能力; ねじり剛性; 損傷評価; ねじり耐力; ねじり変形能力; 繰返しねじり

(l)Where the preloading was in the elastic range, no changes were observed either in the yield strength or ultimate strength in the final stage of loading(2)When the member yielded due to preloading, the yield strength in the final stage of loading decreased by approximately 10 %. The ultimate strength remained unchanged or increased slightly (by 5 to 10 %) when the member was subjected to pure bending or eccentric tension. The ultimate strength decreased by approximately 10 % under eccentric compression and by 20 to 30 % when a torsional force was applied(3)When the member yielded due to preloading , the final curvature increased by 10 to 50 %. The rate of increase was high when pure bending or eccentric tension was applied. Thus, when the member yielded due to preloading, deformability apparently increased but flexural rigidity decreased considerably(4)A relationship between the torsional loading amplitude and fatigue life (S-N curve) was obtained. The S'N curve under torsion was characterized by a discontinuity at a loading amplitude around 80 %. The point of discontinuity represented the yielding of the longitudinal or transverse reinforcement. It was determined to be the point where rate of decrease of fatigue life increased(5)The test on the member reinforced with fiber reinforced plastics(FRP) rods found no structural problems as compared with ordinary reinforced concrete members

（l）如果预加载在弹性范围内，则在加载的最后阶段没有观察到屈服强度或最终强度的变化（2）当成员由于预加载而屈服时，加载的最后阶段的屈服强度降低了约10％。当成员受到纯弯曲或偏心张力时，最终强度保持不变或略有增加（增加5％至10％）。在偏心压缩下，当扭转力施加扭转力时，最终强度降低了约10％，当成员由于预加载而产生扭转力时，最终曲率增加了10％至5​​0％。当纯净弯曲或偏心张力时，增加速率很高。因此，当成员由于预加载而产生时，显然会增加可变形性，但弯曲刚度大大降低（4）扭转负荷振幅与疲劳寿命（S-N曲线）之间的关系。扭转下的S'n曲线的特征是在80％左右的负载振幅下处于不连续性。不连续点表示纵向或横向加固的屈服。它被确定为疲劳寿命降低率增加的点（5）与普通钢筋混凝土成员相比

项目成果

土木学会: "繰返しねじりを受ける鉄筋コンクリート部材の耐力と変形"土木学会 第56回年次学術講演会講演概要集第5部. 5. V-444 (2001)

日本土木工程学会：《反复扭转下钢筋混凝土构件的年强度和变形》日本土木工程学会第56届年会学术会议摘要第5.5.V-444部分（2001）

N,Kawaguchi, H,Kuga, T,Yoda: "Residual Capacity of Concrete Members Reinforced With AFRP and CFRP Rods under Reversed Torsion or Bending"Concrete under Severe Conditions 2. Vol.3. 1489-1498 (1998)

N,Kawaguchi, H,Kuga, T,Yoda：“反向扭转或弯曲下用 AFRP 和 CFRP 棒加固的混凝土构件的残余能力”恶劣条件下混凝土 2. Vol.3。

N,Kawagnchi: "Ultimate Strength and Deformation Characteristics of Concrete Members Reinforced with AFRP Rods Under Combined Axial Tension or Compression and Bending"Fiber-Reinforced-Plastic Reinforcement for Concrete Structures, -International. Syposiunr

N，Kawagnchi：“在轴向拉伸或压缩和​​弯曲组合下用 AFRP 杆加固的混凝土构件的极限强度和变形特性”混凝土结构用纤维增强塑料加固，-国际。

N,Kawaguchi, H,Kuga, T,Yoda: "Torsional Strength of Concrete Members with Non-Prestressed Aramid FRP Reinforcement"Proceedings of the Fifth East Asia-Pacific Conference on Structural Engineering and Construction. VoL2. 1047-1052 (1995)

N,Kawaguchi, H,Kuga, T,Yoda：“非预应力芳纶 FRP 加固混凝土构件的扭转强度”第五届东亚太平洋结构工程与施工会议论文集。

N,Kawaguchi, H,Kuga, T,Yoda: "Torsional Capacity of Non-Prestressed Concrete Members Subjected to Reversed Torsion"Proceedings of the Third International Symposium FRP Reinforcement for Concrete Structures. Vol.2. 333-340 (1997)

N,Kawaguchi, H,Kuga, T,Yoda：“反向扭转下非预应力混凝土构件的扭转能力”第三届国际混凝土结构玻璃钢加固研讨会论文集。