Development of Cost-Effective Accelerated Bridge Construction in Skew and Right Alignments

开发具有成本效益的斜线和右线加速桥梁施工

• 批准号: RGPIN-2014-05275
• 负责人: Sennah, Khaled
• 金额: $ 1.75万
• 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: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636424
• 关键词: Development; Cost; Effective; Accelerated; Bridge

The use of prefabricated elements and systems in accelerating construction of new bridges and replacement of deteriorated ones has recently been the subject of much attention and interest amongst bridge jurisdictions. Prefabricated elements and systems can be quickly assembled and could reduce design efforts, 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 involve full-depth, full width, precast concrete deck slab placed transversally over steel or concrete girders where grout pockets are provided to accommodate clusters of shear connectors welded to steel girders or embedded in concrete girders. The Canadian Highway Bridge Design Code does not provide enough guidance or specifications for the economical design of such prefabricated bridge system in skew and right alignments. Literature review revealed a number of important unresolved analysis, design and performance issues which require detailed evaluation. These issues include: (i) the dead and live load distribution coefficients for non-composite bridges in skew alignment at construction stage during precast deck placement; (ii) live load distribution coefficients for composite bridges in skew alignment at ultimate serviceability and fatigue limit states; (iii) capacity of stud clusters at ultimate and fatigue limit states as opposed to single stud applications, incorporating ultra-high performance concrete (UHPC) in shear puckets; (iv) precast panel-to-panel connection within bridge span for strength and long-term durability (i.e. water leakage); (v) precast panel-to-panel connection, incorporating glass fibre polymer (GFRP) bars with headed ends and UHPC at the negative moment region to add to the strength of the composite girder at ultimate and fatigue limit states; (vi) follow-up field study on actual bridges to verify the finite-element computer modeling for truck load distribution and to observe interaction of the various system components under actual field conditions. The aim of this research is to contribute to the efficient design of such prefabricated bridges by developing experimentally calibrated, computer based, analytical models capable of predicting accurately their response due to sequence of construction, truck load history and environmental conditions. The proposed research program for the next 5 years fosters interaction with the Ontario Ministry of Transportation that will provide data on bridges built in Ontario with full-depth, full-width, deck panels and facilitate field testing. 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. This study is expected to result in a more economical prefabricated bridge design process, with potentially significant cost savings to bridge owners. Field data and full-scale experimental results will provide a meaningful feedback to bridge designers, leading to a new generation of minimal maintenance bridges, detailed for inherent durability.

使用预制构件和系统来加速新桥梁的建设和更换老化桥梁最近引起了桥梁管辖区的广泛关注和兴趣。预制构件和系统可以快速组装，可以减少设计工作，减少对桥梁的影响。这些系统之一涉及全深度、全宽度的预制混凝土桥面放置。横向在钢或混凝土梁上，提供灌浆袋以容纳焊接到钢梁或嵌入混凝土梁中的剪力连接器集群，加拿大公路桥梁设计规范没有为此类预制桥梁系统的经济设计提供足够的指导或规范。文献综述揭示了许多未解决的重要分析、设计和性能问题，这些问题包括： (i) 静载和活载分配系数。预制桥面铺设过程中施工阶段斜向对准的非复合材料桥梁；(ii) 最终使用性能和疲劳极限状态下斜向对准的复合材料桥梁的活荷载分布系数；(iii) 螺柱组在极限和疲劳极限状态下的承载能力：与单螺柱应用相反，将超高性能混凝土 (UHPC) 纳入剪力桶中；(iv) 在桥跨内采用预制板对板连接，以提高强度和长期耐用性（即漏水）； (v) 预制板与板之间的连接，在负弯矩区域结合带头端的玻璃纤维聚合物 (GFRP) 杆和 UHPC，以增加复合材料梁在极限和疲劳极限状态下的强度；对实际桥梁进行现场研究，以验证卡车载荷分布的有限元计算机模型，并观察实际现场条件下各个系统组件的相互作用，本研究的目的是通过开发来促进此类预制桥梁的有效设计。实验地基于计算机的校准分析模型能够准确预测其对施工顺序、卡车装载历史和环境条件的响应。拟议的未来 5 年研究计划将促进与安大略省交通部的互动，该部将提供有关已建桥梁的数据。从长远来看，将产生更可靠、更经济的预制桥梁系统设计表达式和方法，并可能纳入加拿大公路桥梁设计规范。 .这项研究是预计将带来更经济的预制桥梁设计过程，为桥梁所有者节省大量成本。现场数据和全面的实验结果将为桥梁设计者提供有意义的反馈，从而产生新一代的最小维护桥梁，详细信息请参阅固有的耐用性。