宽幅预应力混凝土矮塔斜拉桥设计

Design of wider prestressed concrete extradosed cable-stayed bridge

金廊公路大泖港大桥为宽幅预应力混凝土矮塔斜拉桥,跨径布置为(115+180+115)m,桥宽39.6 m,采用塔梁固结在梁底设置支座的结构体系。主桥各构件的主要构造设计尽可能简洁、轻盈,具体结构布置及尺寸根据结构计算确定,均满足现行规范要求。主桥采用了大吨位支座,并在地震作用下采用了减隔震设计,并对减隔震的效果以及构造要求进行了简要介绍。通过本工程的总体设计,对宽幅预应力混凝土矮塔斜拉桥的设计方法及要点提出了一定的建议,为以后类似工程提供参考。

The Damao River Bridge of the Jinlang Road is a wider prestressed concrete Extradosed Cable-stayed bridge,whose span is(115 +180+115) m with 39.6m width.The pylon and girder are rigidly connected,while the girder and pylon pier are separate.Every member of the bridge is designed concisely and lightly according to the analysis result to meet the standard requirements.The large tonnage bearings are used considering the aseismic design.The effection of seismic isolation and the detailing requirements are introduced concisely.The design method of the wider prestressed concrete extradosed cable-stayed bridge is advised according to the example,which provide reference for similar projects in the future.