【摘要】 简支变连续桥梁兼顾简支梁桥和连续梁桥的优点，被国内外大力推广应用。但简支变连续桥梁的预应力方案复杂性降低了其施工快捷性。本文通过杆系和实体模型进行对比研究，对小箱梁简支变连续的应力分布进行了分析，然后通过预应力等效概念设计方法，研究利用UHPC材料的抗拉和延性性能实现无预应力简支变连续的可行性和设计方法，结果证明具有可实施性，最后提出了可实现的技术方案。更多还原

【Abstract】 The simply supported bridge with continuous deck has the advantages of both simply-supported girder bridge and continuous girder bridge,and has been widely applied.But the complexity of the prestressed concrete scheme for simply supported continuous bridge reduces the construction speed.With the truss model and the solid model,this paper compared and analyzed the small box girder with the construction stage from simply supported to continuous to get the stress distribution.By the method of prestressing equivalent concept to design the structure with UHPC tensile properties,the feasibility and design method were analyzed using UHPC as the substitutes of prestressing,the operation of the scheme are put forward to application.更多还原