新型管翼缘组合梁桥受力性能与设计方法研究

The innovative steel and concrete composite girders with concrete filled or hollow tubular flanges are the combination of new material, innovative structure and neoteric design concept, which has unique structural behavior and economic properties. This project plans to conduct series of model tests, theoretical analysis, numerical simulation, and bridge engineering application for steel and concrete composite girders with tubular flanges, in order to study its structural bending, shear and torsional behavior. It is analyzed the suitable tubular flange composite bridge structure for straight bridge, curved bridge and skewed bridge. For the innovative composite bridge with tubular flanges, design system is built, essential basic theory is proposed for calculation and analysis, and design method and criterions are established. Based on the study of this project, it is expected to build innovative basic theory and realize engineering application in the aspect of structural behavior and design method for composite bridge structure with tubular flanges. The research of this project not only supplies theoretical basis and key technical support for building this innovative composite girders bridge, but also provides reference for developing relevant technical specifications.

新型管翼缘组合梁桥是新材料、新结构与设计新理念的有机结合，具有独特的受力性能与技术经济性能。本项目通过新型管翼缘组合梁的系列模型试验、理论分析、数值模拟和实桥应用研究，系统深入探究新型管翼缘组合梁桥的抗弯、抗剪与抗扭性能，分析适应于正交直桥、弯桥和斜交桥的管翼缘组合梁桥结构型式，提出新型管翼缘组合梁桥创新结构设计体系与计算分析的关键基础理论，建立新型管翼缘组合梁桥设计方法与设计准则。通过本项目的研究，可望在新型管翼缘组合梁桥受力性能与设计方法研究领域，取得具有创新性的基础理论与工程应用研究成果。本项目研究成果不仅可为新型管翼缘组合梁桥建设提供理论依据和关键技术支撑，对编制有关规范亦可提供参考。

新型管翼缘组合梁桥是新材料、新结构与设计新理念的有机结合，是钢桥技术创新的重要体现。本项目通过系列试验研究、数值分析、理论研究和实桥应用，深入研究了新型管翼缘组合梁桥的抗弯、抗剪与抗扭性能，评价了新型管翼缘组合梁的技术经济性能，提出了新型管翼缘组合梁桥的合理管翼缘型式、截面构造、强度匹配、剪力连接及构造设计准则，分别建立了采用平腹板、波折腹板的内填混凝土管翼缘组合梁和空管翼缘组合梁的抗弯、抗剪与抗扭承载力简化计算模型和计算公式，提出了适用于直桥、弯桥和斜交桥的管翼缘组合梁桥结构型式，建立了新型管翼缘组合梁桥设计方法与设计准则，并将项目研究成果成功应用于多座管翼缘组合梁桥的设计与建造。本项目研究成果不仅可为新型管翼缘组合梁桥建设提供理论依据和关键技术支撑，对编制有关规范亦可提供参考。