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以往的大多数有关斜拉桥斜拉索风雨振动的研究都是在风洞内进行。虽然这些风洞/风雨洞试验展现出了在斜拉桥现场观测记录的原型斜拉索风雨振动一些重要性质,可是在原型斜拉索和圆柱体节段模型之间确实存在着某些不同。该文旨在探索原型斜拉索发生风雨振动的机理,以大量的参数分析研究系统各主要参数对原型斜拉索风雨振动的影响和作用。参数分析的结果表明:变化的气动力阻尼系数和/或水线运动、索运动以及风这三者之间相互作用所产生的激励力导致系统的风雨振动;索的结构阻尼的增加可以有效抑制索的风雨振动;索内静张力对系统的振幅有一定影响;平均风的风速剖面中的幂指数对系统的振幅也有一定影响,特别对系统发生风雨振动的相对应风速有一定影响。
Most of the previous studies on wind and rain vibration of cable stayed cable stayed in the wind tunnel. Although these wind / rain tunnel tests show some important properties of wind and rain vibration of the prototype stay cable observed and recorded on the site of the cable-stayed bridge, some differences do exist between the prototype stay cable and the cylinder segment model. The purpose of this paper is to explore the mechanism of wind and rain vibration of prototype diagonal cable and analyze and study the influence and influence of the main parameters of the system on the wind and rain vibration of the prototype cable with lots of parameters. The results of the parametric analysis show that the force induced by the interaction between the aerodynamic damping coefficient and / or the waterline motion, the cable motion and the wind leads to wind and rain vibration of the system. The increase of structural damping of the cable can be effectively suppressed The wind and rain vibration of the cable; the static tension in the cable has certain influence on the amplitude of the system; the power index in the average wind velocity profile also has some influence on the amplitude of the system, especially the corresponding wind speed of the system.