【摘要】 为进一步提升车辆在桥梁伸缩缝处行驶的安全性和舒适性，提出了一种新型无缝桥面板构造，即通过设置多道胀缝和填充黏弹性填料，实现大缝化小缝、小缝化无缝的目标。该技术是利用有限元软件ABAQUS建立新型无缝桥面板实体仿真模型，以研究波形钢筋规格（包括直径、间距和矢高等参数）和胀缝宽度对无缝桥面板压缩与拉伸性能的影响；开展新型无缝桥面板缩尺试验，研究了新型无缝桥面板弹塑性特性和胀缝的变形性能，并分析了不同荷载工况下的应力分布规律。研究结果表明：增加钢筋矢高和直径可以显著提高无缝桥面板的弹性变形性能和承载能力，但会降低其塑性变形能力；合理设置波形钢筋间距能有效协调结构刚度与变形性能；1道胀缝的理想收缩伸长变形量为5.0 mm，此时黏弹性填料的应力松弛性能最佳。该研究成果已成功应用于某城市高架桥工程实践，使桥面平顺性和行车舒适性得到了显著改善，可为后续工程解决伸缩缝装置的病害问题提供新的技术思路和方向。更多还原

【Abstract】 In order to further improve the safety and comfort of vehicles driving at the bridge expansion joint, a new type of seamless bridge deck structure is proposed, which is transforming the large joints into small ones and the small joints into seamless ones by setting multiple expansion joints and filling viscoelastic fillers. This technology utilizes the finite element software ABAQUS to establish a new solid simulation model of the seamless bridge deck to study the impact of corrugated steel bar specifications(including parameters such as diameter, spacing, and rise) and expansion joint width on the compression and tensile properties of the seamless bridge deck; The scale test of the new type of seamless bridge deck is carried out to study the elastic-plastic characteristics of the deck and the deformation performance of the expansion joint, and the stress distribution law under different load conditions is analyzed. The results show that increasing the rise height and diameter of reinforcement can significantly improve the elastic deformation performance and bearing capacity of seamless bridge deck, but will reduce its plastic deformation capacity; That reasonable spacing of corrugated steel bars can effectively coordinate structural stiffness and deformation performance; When the ideal shrinkage elongation deformation of an expansion joint is 5 mm, the stress relaxation performance of viscoelastic filler is the best. This research has been successfully applied to an urban viaduct project, significantly improving the smoothness of the bridge deck and driving comfort, which can provide new technical ideas and directions for solving the defects of expansion joint devices in subsequent projects.更多还原