混凝土连续刚构桥预拱度设置研究

连续刚构桥在设计中设置合理的预拱度能够消除施工过程中各种荷载对线形的影响,减少后期运营过程中的收缩徐变、后期预应力的损失、活载变形等产生的下挠现象。通过对现行规范规定的连续刚构桥预拱度设置的方法进行研究,提出了预拱度设置的合理建议,并通过实例加以说明。

Research on Continuous Rigid Frame Bridge Pre-camber Design

In the design of continuous rigid frame bridge setting reasonable pre-camber can eliminate the impact of various loads on the linear in construction process,reduce shrinkage and creep in the process of post-operation,loss of prestress in the late stage,emerging deflection phenomenon caused by deformation produced by live load and so on.The study based on continuous rigid frame bridge setting camber methods in the current specification,proposes reasonable proposals on camber setting and thereupon illustrates this with example.