斜拉桥索塔锚固区设计计算研究
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摘要
索塔锚固区作为斜拉桥的关键部位,是斜拉桥设计的重点和难点,其可靠性将直接影响全桥的安全性和耐久性。文中介绍常用的索塔锚固区结构形式及优缺点,结合项目特点,经综合比选,最终确定古马干河特大桥的索塔锚固区结构形式。提出了一种midas程序简化计算方法,与ANSYS模型计算相比,结果偏于保守,并能满足规范要求,保证结构安全。
As a key part of cable-stayed bridges,the cable-pylon anchorage zone has always been one of the key and difficult points in the design of cable-stayed bridges,its reliability will directly affect the safety and durability of the full bridge,so its structural design and stress calculation are getting more and more attention.The commonly used structural forms of the cable-pylon anchorage zone and their advantages and disadvantages are introduced.Combined with the features of the project,the structural form of the cable-pylon anchorage zone of the Gumagan River Bridge is determined after comprehensive selection.A simplified calculation method of Midas program is proposed and compared with the calculation results of ANSYS model.It shows that the result is conservative,and it also meets the requirements of the standardand ensures structural safety.
As a key part of cable-stayed bridges,the cable-pylon anchorage zone has always been one of the key and difficult points in the design of cable-stayed bridges,its reliability will directly affect the safety and durability of the full bridge,so its structural design and stress calculation are getting more and more attention.The commonly used structural forms of the cable-pylon anchorage zone and their advantages and disadvantages are introduced.Combined with the features of the project,the structural form of the cable-pylon anchorage zone of the Gumagan River Bridge is determined after comprehensive selection.A simplified calculation method of Midas program is proposed and compared with the calculation results of ANSYS model.It shows that the result is conservative,and it also meets the requirements of the standardand ensures structural safety.
引文
[1]魏奇芬,叶文海,范史文,等.大跨度斜拉桥混凝土索塔锚固区理论与设计的研究进展综述[J].现代交通技术,2010(12):45-48.
[2]吴朴.南台头闸桥梁索塔锚固区设计研究[J].城市道桥与防洪,2017(10):66-70.
[3]张全阳,李坤.白潭湖大桥斜拉索塔上锚固设计研究[J].城市道桥与防洪,2014(6):145-148,176.
[4]公路斜拉桥设计细则:JTG/T D65-01-2007[S].北京:人民交通出版社,2007.
[5]公路钢筋混凝土及预应力混凝土桥涵设计规范:JTG D62-2004[S].北京:人民交通出版社,2004.
[6]徐瑞丰,李正,韩大章.预应力粗钢筋在斜拉索锚固中的应用[J].现代交通技术,2007(8):44-46.
[2]吴朴.南台头闸桥梁索塔锚固区设计研究[J].城市道桥与防洪,2017(10):66-70.
[3]张全阳,李坤.白潭湖大桥斜拉索塔上锚固设计研究[J].城市道桥与防洪,2014(6):145-148,176.
[4]公路斜拉桥设计细则:JTG/T D65-01-2007[S].北京:人民交通出版社,2007.
[5]公路钢筋混凝土及预应力混凝土桥涵设计规范:JTG D62-2004[S].北京:人民交通出版社,2004.
[6]徐瑞丰,李正,韩大章.预应力粗钢筋在斜拉索锚固中的应用[J].现代交通技术,2007(8):44-46.