摘要
以盖州市双台镇人民广场景观桥梁的设计为背景,解决装饰斜拉桥中确定索力及无应力索长的问题,为以后同类桥梁的设计提供参考。根据悬链线理论推导出索长与水平分力的关系,以水平分力为控制参数,以拉索下挠度为控制目标,逐步迭代求出索力及无应力索长。运用迭代算法只需迭代2～3次便可以求出比较精确的结果,且将拉索的下挠度控制在索长/300以内。实例证明该算法收敛速度快,精度较高,可以方便地求出索力和索长,适用于工程实际。
Based on the design of Gaizhou Shuangtai People＇s Square Landscape Bridge as the background, this paper aims at solving the problem that how to determine the cable force and the unstressed length of decorated cable - stayed bridge, which can provide a reference for future design of similar bridges. According to the relation between cable length and horizontal force deduced by catenary theory, with horizontal force as a control parameter, the cable deflection as the control target, to iterative cable force and unstressed length of cable step by step. By using the iterative algorithm, it can be obtained an accurate result with 2 - 3 times, and the cable deflection control in cable length of 1/300. The example proves that the algorithm has convergence speed, high precision, can be convenient to calculate the cable force and cable length, and be applicable to engineering practice.
出处
《北方交通》
2013年第5期51-54,共4页
Northern Communications
基金
国家自然基金项目(51078242)
住房和城乡建设部科学技术项目(2010-K3-38)
关键词
景观桥梁
装饰斜拉桥
悬链线理论
迭代算法
Landscape bridge
Decorative cable - stayed bridge
Catenary theory
Iterative algorithm
