Study on the Renewal Precast Concrete Slabs of the Bridge Deck

桥面预制混凝土板更新改造研究

• 批准号: 10555157
• 负责人: HAMADA Sumio
• 金额: $ 4.74万
• 依托单位: YAMAGUCHI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555157/
• 关键词: PRECAST SLAB; CONNECTION; FATIGUE STRENGTH; PUNCHING SHEAR SIRENGTH; 合成構造; RC継手; 鋼板; H型鋼; RC床版; 移動輪荷重; 定点疲労; 鉄筋ひずみ; 破壊面ひび割れ

In order to reduce the work at the site, the bridge slabs have been developed to precasting instead of the casting concrete at the site. Precast slabs panels must be mechanically connected between the panels, and maintain continuity as a whole slab. The strength at the connected region is also larger than the strength of the precast panel. Most precast slabs are prestressed and the connecting region is reinforced, which decrease strength of the slab. Precast slabs can be renewal when they are severely damaged. Precat panels have been more and more commonly used in Japan.In order to use these precast panels more frequently, strength of the connection between the panels must be higher than the strength of panels. A newly developed connection consists of a steel beam with studs and concrete. This connection system works as a composite member and increase the member strength.About 40 specimens were tested in static loading, fatigue loading and repeated moving loading. Test results show that the composite connecting system is far stronger than the precast prestressed slab under static loading, and that fatigue strength is also higher than the prestressed concrete slab. A moving load test was carried out to the test specimen, which is rather large scale. From the test results the region of connection is sufficiently strong, and the slab has sufficient continuity.

为了减少现场工作量，桥面板由现场现浇混凝土发展为预制。预制板面板之间必须机械连接，并保持作为整体板的连续性。连接区域的强度也大于预制板的强度。大部分预制板为预应力板，连接处为加强板，降低了板的强度。当预制板严重损坏时，可以进行更新。预制板在日本的使用越来越普遍，为了更频繁地使用这些预制板，板与板之间的连接强度必须高于板的强度。一种新开发的连接由钢梁与栓钉和混凝土组成。对40个试件进行了静载、疲劳和反复移动荷载试验。试验结果表明，组合连接体系在静载作用下的强度远高于预制预应力板，疲劳强度也高于预应力混凝土板。对较大尺寸的试件进行了移动荷载试验。从试验结果来看，连接区域足够牢固，板具有足够的连续性。

项目成果

OKUMURA,M., HAMADA,S., MATSUO,E., NOMURA,S.: "A Study on the Evaluation for Punching Shear Strength of PC slabs"Proceedings of the Japan Concrete Institute. V.21-3. 559-564 (1999)

OKUMURA​​,M.、HAMADA,S.、MATSUO,E.、NOMURA,S.：“PC 板冲剪强度评估研究”日本混凝土协会会议录。

HAMADA,S., MATSUO,E., YAMAMOTO,H.: "Study on the Development of Composite Structures of Precast Slab Joints"Proceeding of 1st Symposium on Decks of Steel Highway Bridges. V.1. 177-182 (1998)

HAMADA,S.、MATSUO,E.、YAMAMOTO,H.：“预制板节点复合结构的发展研究”第一届公路钢桥桥面研讨会论文集。

浜田純夫: "プレキャスト床版の合成構造継手部の開発に関する研究"第一回鋼橋床版シンポジウム講演論文集. 177-182 (1998)

Sumio Hamada：“预制桥面板合成结构接头的开发研究”第一届钢桥面研讨会论文集177-182（1998）。

Sumio HAMADA: "Mechanical behaviors and design concept of the prestressed precast slab joint" Proceedings of the 13th FIP Congress. 1. 191-196 (1998)

Sumio HAMADA：“预应力预制板接头的力学行为和设计理念”第十三届 FIP 大会论文集。

HAMADA,S., MATSUO,E., ABE,M.: "Mechanical behaviors and design concept of the prestressed precast slab joint"Proceedings of the 13^<TH> FIP Congress on Challenge for Concrete in the Next Millennium. Vol.2. 555-560 (1998)

HAMADA,S.、MATSUO,E.、ABE,M.：“预应力预制板接头的力学行为和设计概念”第 13 届 FIP 未来千年混凝土挑战大会论文集。