(SGER) Load Distribution Factors for Developed Innovative CFRP Prestressed Concrete Box-Beam Bridge System

(SGER) 开发的创新 CFRP 预应力混凝土箱梁桥系统的荷载分布系数

• 批准号: 0533260
• 负责人: Nabil Grace
• 金额: --
• 依托单位: Lawrence Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0533260&HistoricalAwards=false
• 关键词: SGER; Load; Distribution; Factors; Developed

Support is provided under an SGER award to develop the load distribution factors (LDF) between loaded and unloaded carbon fiber reinforced polymer (CFRP) prestressed concrete box beams under traffic loads for highway bridges. This information is urgently needed for the first planned CFRP prestressed concrete bridge to be built in this country, which is already planned. In order to develop the LDF equations for this type of bridge two one-half scale CFRP concrete box beam bridge models with longitudinal and transverse CFRP prestressing strands will be built and fully instrumented. . Each bridge model will be post-tensioned at different unbonded transverse force levels. The bridge models will be subjected to eccentric and concentric truck loadings within the service load limit. The obtained LDF is of significant importance to bridge design engineers to properly size the prestressed concrete box beams. This investigation will result in valuable technical information that can be adopted in the design and construction of future CFRP prestressed concrete bridges in the USA. The data, design approach and construction information developed by the research team will offer design guidelines that can be implemented in future ACI and AASHTO design manuals.

SGER 奖项支持开发高速公路桥梁交通荷载下加载和卸载碳纤维增强聚合物 (CFRP) 预应力混凝土箱梁之间的荷载分布系数 (LDF)。该国已经计划建造的第一座碳纤维增强塑料预应力混凝土桥梁迫切需要这些信息。为了开发此类桥梁的 LDF 方程，将建造两个具有纵向和横向 CFRP 预应力绞线的二分之一比例 CFRP 混凝土箱梁桥模型并配备完整的仪器。 。每个桥梁模型将在不同的无粘结横向力水平下进行后张紧。桥梁模型将在使用载荷限制内承受偏心和同心卡车载荷。获得的LDF对于桥梁设计工程师正确确定预应力混凝土箱梁的尺寸具有重要意义。这项调查将产生宝贵的技术信息，可用于美国未来 CFRP 预应力混凝土桥梁的设计和施工。研究团队开发的数据、设计方法和施工信息将提供可在未来 ACI 和 AASHTO 设计手册中实施的设计指南。