超高墩大跨连续刚构桥设计

Design of Super-high Pier and Long-span Continuous Rigid Frame Bridge

以赫章特大桥为例,介绍了该桥超高墩预应力混凝土连续刚构桥设计特点,同时采用有限元软件建立有限元模型,对其荷载作用下静力特性进行分析,计算了桥梁的所有施工阶段、成桥后荷载作用下结构受力状况,进行了高墩弹塑性稳定分析,重点考虑了预应力、混凝土收缩、徐变、整体温差、温度梯度、基础变位、汽车活载、风荷载及其作用组合对结构的影响。还介绍了赫章特大桥主桥的设计特点及静力分析。

Taking Hezhang bridge as an example, this paper introduces the design characteristics of super-high pier prestressed concrete continuous rigid frame bridge. Using finite-element software to establish the finite-element model, the static characteristics of the loads is simulated, the force status of the bridge structure under all stages of construction and finished bridge state is calculated, and the high-pier elastic and plastic stability are analyzed, especially including the effects of prestress, concrete shrinkage, creep, changes of global temperature, temperature gradient, foundation deforma tion, live load, wind load and their effect combination. This paper introduces the design characteristics and static force analysis of the main bridge of Hezhang bridge.