22m铰缝式空心板替代方案研究与工程实践

• 作 者: 邓青儿 徐舒 年福龙
• 机 构: 同济大学土木工程学院,上海市政工程设计研究总院集团有限公司,上海同盛内河航道建设发展有限公司,
• 出 处: 上海建设科技
• 发表日期: 2015年05期
• 关键词: 铰缝式空心板 改进型刚接空心板 替代方案 材料指标 受力性能

针对传统的铰缝式空心板梁在运营过程中出现的病害,从设计与施工角度进行综合优化,提出了改进型刚接空心板和预制简支小箱梁作为22 m空心板的替代方案,量化分析比较了传统和替代方案的截面特性、材料指标和受力性能。研究结果表明2种替代方案均具有明显优势,尤其改进型空心板最大程度地保持了与传统铰缝式空心板施工工艺的统一,显著提高了受力性能而基本不增加材料用量。总结了2种替代方案的选用原则。最后介绍了将研究成果分别应用于改扩建、新建工程的桥梁实例。

Aimed at the defects of the traditional hinged hollow slab beam during the operation process, the design and construction of the hollow slab beam were comprehensively optimized. As an alternative to the 22 m hollow slab, an improved rigid hollow slab and a prefabricated simple box girder were proposed. Quantitative analysis compares the cross-sectional characteristics, material specifications and mechanical properties of traditional and alternative solutions. The results show that the two alternatives have obvious advantages. In particular, the improved hollow slab maximizes the unification with the traditional hinge-type hollow slab construction process, significantly improves the force performance without increasing the amount of material used. Summed up the principle of selection of two alternatives. Finally, the paper introduces the application of the research results to the bridges of reconstruction, expansion and construction respectively.