多变空间连续桁架人行景观桥振动控制研究

摘要:

本文介绍了对一座人行景观桥的振动控制研究。人行桥为实现建筑造型而采用了复杂的空间桁架结构,结构在各向的刚度较小,其自振频率与人行敏感频率接近可能诱发结构出现过大振动,故采取了阻尼器振动控制措施。本文介绍了对原始结构的动力特性分析、阻尼器布置方案设计、结构减震效果分析、阻尼器参数及适应性分析。经过理论研究及实际应用,桥梁减震效果达到预定目标。

Abstract:

This paper introduces researches of vibration controls for a pedestrian landscape bridge. To realize architectural modeling, designers adopt complex space truss. Structures stiffnesses in all directions are small. Structures natural frequencies are approach walking sensitivity frequencies, and it may provoke large vibrations. So, designers choose TMD as vibration controls measures. This paper gives dynamic analysis of original structures, TMD arrangements designs, analyzing of damping effects, parameters analyzing and adaptabilities of TMD. By theoretical research and practical applications, bridge damping effects reach design goals.