Study on Optimum Ratio of Inner Cable and External Cable in Prestressed Concrete Bridges Stiffened with External Cable

外索加固预应力混凝土桥梁内、外索最佳配比研究

• 批准号: 08650524
• 负责人: KAWAKAMI Makoto
• 金额: $ 1.28万
• 依托单位: Akita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650524/
• 关键词: External Cable; Optimum Ratio of Inner Cable and External Cable; Cracking Strength; Ultimate Strength; Time-Dependent Stress Analysis; Composite Prestressed concrete Bridge

1) Bending tests of prestressed composite box girder with steel trussed web were carried out to clarify cracking strength, ultimate strength and collapse mode.2) The above test results from elastic state to ultimate state of the girder were compared with theoretical ones analyzed by plane frame computer program of finite element method. Furthermore, parametric analysis was performed and the results were summarized.3) Based on the above test results and parametric analysis, the optimum ratio of inner cable and external cable was discussed.4) The long-term deformation test was measured. Own weight and prestressing force are the sustained load. Displacements and strains due to creep and shrinkage of concrete were measured more than one year.5) Time-dependent stress of the structures with external cable were analyzed and its computer program was Developed.6) The test results of long term deformation were compared with the analyzed results.7) The optimum ratio of inner cable and external cable in the structures with external cable considering the long-term deformation, was investigated.8) All results of two years from 1996 to 1997 were summarized and the repot was completed.

1)对钢桁腹板预应力组合箱梁进行了抗弯试验，研究了其抗裂强度、极限承载力和破坏模式。2）将试验结果从弹性状态到极限状态进行了分析，并与平面刚架有限元程序的理论分析结果进行了比较。3）根据试验结果和参数分析，探讨了内、外索的最佳配比; 4）进行了长期变形试验。自重和预应力为持续荷载。对体外索结构的时变应力进行了分析，并编制了相应的计算程序; 6）对体外索结构的长期变形试验结果与分析结果进行了比较; 7）对体外索结构考虑长期变形时的最佳内外索比进行了研究，8）对1996 ~ 1997年两年的研究结果进行了总结，完成了本报告。

项目成果

Kawakami, M.and Ghali, A.: "Time-Dependent Stressess in Ptrestressed Concrete Secions of General Shape" PCI Journal. Vol.4,No.3. 96-105 (1996)

Kawakami, M. 和 Ghali, A.：“一般形状预应力混凝土截面中的时间相关应力”PCI 期刊。

大沢 浩二、川上 洵、劉 新元、佐野 ユミ子: "鋼トラスウェブPC梁の 静的載荷試験" 第7回プレストコンクリートの発展に関するシンポジウム論文集. 757-760 (1997)

Koji Osawa、Satoshi Kawakami、Xinyuan Liu、Yumiko Sano：“钢桁架腹板 PC 梁的静载试验”第七届预应力混凝土进展研讨会论文集 757-760（1997）。

川上 洵、松塚 忠政、樫福 浄、徳重 英信: "鋼性マトリックス法による 連続合成桁の時間依存性応力解析" 構造工学論文集. V.43A. 1323-1330 (1997)

Kon Kawakami、Tadamasa Matsuzuka、Kiyoshi Kashifuku、Hienobu Tokushige：“使用钢矩阵法进行连续组合梁的时间相关应力分析”结构工程杂志 V.43A 1323-1330 (1997)。

川上 洵、 菅原 昭麿、 松塚忠政、 樫福 浄、 徳重英信: "プレストレストコンクリート橋脚の終局強度および構造特性" 構造工学論文集. V.44A. (1998)

Kon Kawakami、Akimaro Sukawara、Tadamasa Matsuzuka、Kiyoshi Kashifuku、Hienobu Tokushige：“预应力混凝土桥墩的极限强度和结构性能”《结构工程杂志》V.44A。

Kawakami, M.and Ghali, A.: ""Cracking, Ultimate Strength and Deformations of Prestressed Concrete Sections of General Shape"" PCI Journal. Vol.4, No.4. 114-122 (1996)

Kawakami, M. 和 Ghali, A.：“一般形状预应力混凝土截面的开裂、极限强度和变形”” PCI 期刊。