Development of Cost-Effective Box Girder Bridge Design and Accelerated Construction in Skew and Straight Alignments

开发具有成本效益的箱梁桥设计和斜线和直线加速施工

• 批准号: RGPIN-2019-06842
• 负责人: Sennah, Khaled
• 金额: $ 2.62万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=739136
• 关键词: Development; Cost; Effective; Box; Girder

The use of prefabricated elements and systems in accelerating bridge construction has recently been the subject of much attention and interest amongst bridge jurisdictions. Prefabricated elements and systems can be quickly assembled, reduce the impact on the environment in the vicinity of the site, and minimize the delays and lane closure time and inconvenience to the traveling public, saving time and tax payers' money. One of these systems is the full-depth, full width, precast concrete deck slab placed transversally over box girders where grouted pockets are provided to accommodate clusters of shear connectors welded to steel girders or embedded in concrete girders. The Canadian Highway Bridge Design Code, CHBDC does not provide enough guidance or specifications for the economical design of such prefabricated bridge system made of box section in skew and right alignments. Literature review revealed a number of important unresolved analysis, design and performance issues which require detailed evaluation and form the short term objectives of this research. These issues include: (i) dead and live load distribution coefficients for box girder bridges in skew alignment at construction stage; (ii) live load distribution coefficients for composite box girder bridges in straight and skew alignment at ultimate and fatigue limit states; (iii) capacity of steel stud clusters at ultimate and fatigue limit states as opposed to single stud applications, incorporating ultra-high performance concrete (UHPC) as filling material in shear pockets; (iv) capacity of steel channel connectors at ultimate and fatigue limit states and (v) ultimate and fatigue capacities of precast panel-to-panel connection in the tension side over piers for strength and long-term durability, especially with the use of glass fiber reinforced polymer (GFRP) bars as slab main reinforcement at the negative moment region. The long term objectives of this research aim at contributing to the efficient design of such prefabricated box girder bridges by developing experimentally calibrated, computer based, analytical models capable of predicting accurately their response due to load conditions. The research will include numerical modelling using the finite-element method, the Orthotropic Plate Theory and experimental program. This study is expected to result in a more economical prefabricated bridge design process, with potentially significant cost savings to bridge owners. The proposed research program will foster interaction with the industry that will benefit the bridge engineering profession. In the long term, more reliable and economical expressions and methodology for design of such prefabricated bridge system will be generated for possible inclusion in the Canadian Highway Bridge Design Code as the applicant did for its forthcoming 2019 edition based on his current NSERC Discovery and Engage Grants and additional funding from the industry.

最近，在加速桥梁建设中使用预制元素和系统已成为桥梁管辖区引起人们关注和兴趣的主题。可以快速组装预制的元素和系统，减少对现场附近环境的影响，并最大程度地减少延误和关闭时间，并给旅行公众带来不便，从而节省时间和纳税​​人的钱。这些系统之一是在盒子大梁上横向放置的全深，完整的预制混凝土甲板平板，提供灌浆口袋，以容纳焊接到钢梁或嵌入混凝土梁中的剪切连接器簇。 CHBDC加拿大高速公路桥设计代码没有提供足够的指导或规格，用于在偏斜和右对齐中由框部分制成的此类预制桥系统的经济设计。文献综述揭示了许多重要的未解决的分析，设计和绩效问题，这些问题需要详细评估，并构成了本研究的短期目标。这些问题包括：（i）在施工阶段偏向对齐的盒子梁桥的死亡和活负荷分配系数； （ii）在终极和疲劳极限状态下，直轴桥桥的复合盒围绕桥桥的活载荷分布系数； （iii）在极限和疲劳极限状态下而不是单螺柱应用，将超高性能混凝土（UHPC）作为剪切袋中的填充材料，以极限和疲劳极限状态的能力； （iv）在最终和疲劳极限状态下钢通道连接器的容量以及（v）张力侧的预制面板与面板连接的最终和疲劳能力，以实现强度和长期耐用性，尤其是使用玻璃纤维增​​强的聚合物（GFRP）杆作为负矩区域的平板主凸台。 这项研究的长期目标旨在通过开发实验校准的，基于计算机的，分析模型，能够准确预测由于负载条件而准确预测其响应，从而有助于有效地设计此类预制的盒子梁桥。该研究将包括使用有限元方法，正性板理论和实验程序的数值建模。预计这项研究将导致更经济的预制桥设计过程，并为桥梁所有者节省了大量成本。拟议的研究计划将促进与桥梁工程专业有利的行业互动。从长远来看，将生成更可靠，更经济的表达方式以及该预制桥系统设计的方法，以便将其包含在加拿大高速公路桥设计代码中，就像申请人基于其当前的NSERC发现并参与该行业的赠款和额外资金的申请人所做的那样。