大跨径自锚式悬索桥抗风稳定参数分析与风洞试验

Stability parameter pnalysis of wind resistance and wind tunnel test for long-span self-anchored suspension bridges

从气弹性理论出发,探讨矢跨比、截面形状、施工方法等对桥梁的颤振临界风速及气动稳定性的影响,将计算结果与风洞试验结果相对比。并以位于湖南长沙的中跨328 m、全长728 m的三汊矶大桥主桥为例来论证上述的各项影响。

Based on the aeroelastic theory, the Sanchaji Bridge over Xiangjiang river was chosen to study characteristics of self- anchored suspension bridge, i.e., rise - Span ratio, deck with divergent shape section and different construction methods. The Sanchaji Major Bridge with the center span 328 m and long total length of 732 m. The impact of these factors were analyzed on the aeroelastic coefficients, flutter critical wind speed and the buffet responsing to site winds of steel girder. Accordingly, the results of calculation were compared with those of the real bridge wind tunnel experiment.