某圆拱形桥塔矮塔斜拉桥索塔锚固方案研究

Research on Anchorage Scheme of Cable Tower of a Low-Pylon Cable-Stayed Bridge With Circular Arch Bridge Tower

随着对桥梁景观造型要求的提高,斜拉桥的桥塔会采用非常规造型。上海金运路─申昆路道路贯通工程中跨吴淞江大桥,为满足景观造型要求,采用圆拱形桥塔矮塔斜拉桥。索塔锚固区的设计难点是截面尺寸小,索塔锚固区构造布置空间受限,锚固构件放样、焊接困难,是控制设计的关键部位。配合工程设计,根据常用的提出可行的锚固方案,再通过有限元受力分析验证其可行性与安全性。

With the increasing demand for bridge landscape modeling,the pylons of cablestayed bridges will adopt unconventional shapes.The Shanghai Jinyun Rd.-Shenkun Rd.Road Link Project crosses the Wusong River Bridge,and to meet the requirements of landscape modeling,a round arch bridge tower with a low tower cablestayed bridge is adopted.The design difficulty of the cable tower anchorage area is the small section size,limited structural layout space of the cable tower anchorage area,and the difficulty of anchoring component setting-out and welding,which are the key parts of the control design.In conjunction with the engineering design,a feasible anchoring scheme is proposed based on common practices,and its feasibility&safety are verified through finite element stress analysis.