拱梁组合桥梁在桥梁博士中的调索设计经验

摘要

Beam-arch combination system is a structural system between beam bridge and arch bridge,which not only holds the advantages of both beam and arch systems,but also has its' own characteristics.Steel cable tension adjustment is the most important part of the cable design,which has a direct impact on the stress of arch rib and the beam.Dr.bridge is such a design tool which could systematically provide solutions of cable tension adjustment at each key concern.The No.25 Bridge located in Metro Changde in Hunan Province is a three-spanned prestressed beam-arch composite system landscape bridge.Using it as an example,this article described how to instantly optimize the structural design using Dr.Bridge according to cable tension adjustment,which will be referenced by the similar projects.%拱梁组合体系,是介于梁桥和拱桥之间的结构体系,其本身兼顾了两者的优点,同时也有自己的结构特点.吊杆索力调整是此体系中至关重要的环节,其直接影响拱肋和主梁的受力,而桥梁博士中提供了此类设计的设计工具,比较系统地解决了索力调整的各个关键技术.湖南常德北部新城25号桥为下承式三跨预应力拱粱组合体系景观桥,本文以此桥为背景,使用桥梁博士有限元分析软件,通过使用调索功能,实现拱肋和预应力混凝土设计的快速优化,为同类工程项目的设计提供借鉴和参考.