城市人行天桥自振频率的实用计算  

A Practical Method for Calculating the Natural Vibration Frequency of Urban Pedestrian Overpasses

作　　者：沈中治[1] 

机构地区：[1]北京市市政工程设计研究总院有限公司,100082

出　　处：《特种结构》2015年第2期29-35,共7页Special Structures

摘　　要：结构自振频率是人行天桥的一个重要指标,计算自振频率通常采用有限元结构软件求取,这样做将简单问题复杂化,设计人员甚感不便。因此,本文根据结构动力学原理,参照多质点梁自由振动基本公式,推导出常规连续梁的自振频率关系式,并制成图表,为设计、审图提供方便。The natural vibration frequency of a structure of overpass bridge is an important parameter in design. It is generally calculated using the finite element analysis method, while complicating things and taking a great deal of workload. In this paper, a set of arithmetic expression of the natural vibration frequency for conventional continuous beam is deduced on the bases of structural dynamics, as well as referred to the multi- mass beam vibration theory. For the advantage of design and checking, series of relevant numerical charts and diagrams are also presented.

关 键 词：自振频率 强制性条文 三角函数 双曲线函数 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]