Evaluation of Structural Integrity for Nuclear Power Plant Pipe to Seismic Load

核电站管道抗震荷载结构完整性评价

• 批准号: 06650094
• 负责人: ANDO Kotoji
• 金额: $ 1.28万
• 依托单位: Yokohama National 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650094/
• 关键词: Seismic Load; Nuclear Power Plant Pipe; Crack; J Integral; Leak Before Break; Fracture; Plastic Collapse; Staticall Indterminate Structure; 軽水炉一次系配管; 終局強度; 安全裕度; き裂成長; leak Before Break; き裂開口面積; 延性不安定破壊

The purpose of this research is to make more improvement in degree of safety of pipe, for seismic load by experiments and calculations.The main results from experimental research are as follows.(1)It made clear to evaluate quantitatively the effects of initial crack lengths on the fatigue crack penetration behavior under cyclic low level stress.(2)It made clear that there were two cases : LBB and NO LBB with bending tests under cyclic high level stress, and their conditions were confirmed.The main results from analytical research are as follows.(1)Plastic collapse behavior and ultimate strength wre analyzed for the statically indeterminate pipe system with cracks under excessive uniform loads or concentration ones.(2)Pleatic collapse behavior and ultimate strength were analyzed for the staticall indeterminate pipe system with compliance and cracks having various size under excessive uniform loads.(3)The effects of J,dJ/da, crack lengths and compliance on collapse behavior were analyzed.(4)The K evaluation of pipe subject to bending load was proposed, and its reasonability was confirmed .(5)The LBB condition of pipe subject to bending load was proposed, and its reasonability was confirmed .

本文的研究目的是通过试验和计算，进一步提高管道在地震荷载作用下的安全度。(1)It定量地评价了初始裂纹长度对低水平循环应力下疲劳裂纹扩展行为的影响。(2)It通过高应力循环下的弯曲试验，明确了LBB和无LBB两种情况，并确定了它们的条件。（1）分析了含裂纹超静定管系在均布载荷和集中载荷作用下的塑性失稳行为和极限强度。（2）分析了具有柔度和不同尺寸裂纹的超静定管系在均布荷载作用下的塑性失稳特性和极限强度。（3）分析了J、dJ/da、裂纹长度和柔度等参数对破坏行为的影响。（4）提出了弯曲载荷作用下管道的K值评定方法，并验证了其合理性。（5）提出了弯曲载荷作用下管道的LBB条件，并验证了其合理性。

项目成果

安藤柱 他: "き裂とコンプライアンスを有する不静定な配管系の塑性崩壊挙動と終局強度" 日本機械学会論文集. (審査終了)未定. (1996)

Hasira Ando 等人：“具有裂纹和合规性的不确定管道系统的塑性塌陷行为和极限强度”，日本机械工程师协会会刊（审查已完成）待定（1996 年）。

安藤柱 他: "き裂とコンプライアンスを有する不静定な配管糸の塑性崩壊挙動と終局強度" 日本機械学会論文集. (掲載決定). (1996)

Hasira Ando 等人：“具有裂纹和柔顺性的超静定管道螺纹的塑性塌陷行为和极限强度”，日本机械工程师学会会刊（1996 年出版）。

K.Ando et al: "Ultimate Strength and Plastic Collapse Behavior of Statically Indeterminate Beam with Crack" Jpn.Jour. Mechanical Engineer. 62-594(Accepted). (1996)

K.Ando 等人：“带裂纹的超静定梁的极限强度和塑性破坏行为”Jpn.Jour。

K.Ando et al: "Fatigue Life and Surface Crack Penetration GBehavior of an Alumina Alloy" Fatigue Fract. Engng.Mater. Struct.18. 179-187 (1995)

K.Ando 等人：“氧化铝合金的疲劳寿命和表面裂纹渗透 GB 行为”疲劳断裂。

K.Ando et al: "Ultimate Strength and Plastic Collapse Behavior of Statically Indeterminate Pipe with Crack and Compliance" Jpn.Jour.Mechanical Engineer. (Accepted). (1996)

K.Ando 等人：“具有裂纹和柔量的超静定管道的极限强度和塑性破坏行为”Jpn.Jour.Mechanical Engineer。