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本文概述了我国铁路桥梁第一次模型风洞试验的主要内容和经验。斜拉桥跨度大、重量轻、阻尼小,其风振问题日盆受到重视。铁路斜拉桥活载比重大、梁高桥窄,其抗风特性又不同于一般公路桥。文内详细介绍了红水河铁路斜拉桥风洞静力试验的模型设计、试验方法及其装置,根据试验结果曲线探讨了该桥在施工、建成和通车各阶段,截面的升力、阻力和力矩随攻角变化的特性;对结构因素的影响提出了若干见解。本文为分析铁路桥梁的气动稳定性和改善其抗风性能提供了实验依据。
This article summarizes the main contents and experiences of wind tunnel test of the first model of railway bridge in China. Cable-stayed bridge span, light weight, small damping, the wind-induced problems daily attention. Railway cable-stayed bridge live load ratio, beam Gao Qiao narrow, its wind characteristics are different from the general road bridge. This paper introduces the model design, test method and device of static test of wind tunnel of Hongshuhe Railway Cable-Stayed Bridge in detail. According to the curve of test results, the lift, drag and cross-section of the bridge during construction, Moment changes with angle of attack characteristics; on the structural factors put forward a number of insights. This paper provides an experimental basis for analyzing the aerodynamic stability of railway bridges and improving their wind resistance.