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以鄂东长江大桥(主跨为926m的斜拉桥)为工程背景,建立该桥梁无控、有间断型TMD和连续型TMD的ANSYS模型,对比分析控制器对桥梁风致竖向抖振的减振效果。间断型TMD是在桥梁结构合适的位置布置一段或几段TMD;连续型TMD是在主跨或全桥上连续布置TMD,两者的控制效果均优于单个TMD。ANSYS计算结果表明,间断型TMD和连续型TMD对桥梁风致竖向抖振的减振效果明显。最后,根据相似比制作桥梁模型,进行无控和安装了连续型TMD的桥梁模型风洞试验,结果表明,连续型TMD对桥梁的风致竖向抖振能起到很好的控制效果。
Taking the cable stayed bridge of East Hubei Yangtze River Bridge (main span of 926m) as the engineering background, the ANSYS model of uncontrolled, discontinuous TMD and continuous TMD of the bridge is established. The effects of the controller on the vertical chattering attenuation of the bridge Vibration effect. Discontinuous TMDs have one or more TMDs placed at appropriate locations on the bridge structure. Continuous TMDs have TMDs continuously placed on the main span or full bridge, both of which provide better control than a single TMD. The results of ANSYS show that the discontinuous TMD and continuous TMD have obvious damping effect on vertical wind buffeting of bridge. Finally, the bridge model is made according to the similarity ratio, and the wind tunnel test of bridge model without control and installation of continuous TMD is carried out. The results show that the continuous TMD can effectively control the vertical wind-induced chattering of the bridge.