空中客车交通系统悬索结构的力学特性

利用悬挂的双层索结构作为空中跨越支承结构 ,让自带动力的车辆 (空中客车 )悬挂于轨索上运行 ,这是可在城市和风景区建设的一种新型交通系统。文中主要研究该系统中高架悬索结构的静力特性和设计参数 ,包括结构线形的设计、初始结构内力的确定、车辆运行荷载下结构分析以及结构参数对结构静力性能的影响等。研究表明该种结构在温度变化和外荷载等作用下的力学特性与悬索桥有明显的不同。轨索预张力是影响结构刚度的主要因素 ,而轨索预张力与外荷载作用下的变形呈非线性关系。给出了这种悬索结构的线形和初内力的设计方法。

THE MECHANICAL PROPERTIES OF THE SUSPENSION CABLE STRUCTURE IN AEROBUS TRANSIT SYSTEM

Aerobus driven by self-provided power is a new type of transit system in city and beauty sports, which make use of double-layer suspending cable as its crossing and supporting structure. In this paper, the static mechanical properties and design parameters of overhead suspending cables were studied, including curve shape design, determining initial internal forces, structure analysis under vehicle load and relation structure parameters vs. static characteristics, etc. The results show that aerobus suspending cable structure is different from suspension bridge in mechanical properties when it acted by external factors, such as temperature change, load, etc. Pretension force of the track cable is a main factor affecting structural stiffness. There exists a nonlinear relation between the force and the deformation results from load. The design methods for the curve shapes and determining initial internal forces of suspending cable structure are given.