基于一种反应谱简化方法的人行桥振动分析  

Footbridge Vibration Analysis Under Response Spectrum Simplified Method

作　　者：秦建国[1] 刘宁[1] 

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710075

出　　处：《公路》2013年第6期72-75,共4页Highway

摘　　要：行人荷载是人行桥的激振源,当人行桥梁振动的位移、速度、加速度过大时,行人会因为极度不舒适而停下脚步或离开,因此人行桥的动力设计主要考虑的是结构的正常使用性能,其中,峰值加速度是衡量舒适度的重要参数。介绍了人行桥振动的基本原理以及反应谱方法的研究现状,引入具有一定保证率的概率性响应谱,并将其应用于工程实例,计算其峰值加速度,进而进行舒适度对比评价,为城市人行桥的设计计算提供了一种简单方便的方法。Pedestrian load is the vibration source of footbridge, and also they are very sensitive to the bridge＇s vibration. When displacement, velocity and acceleration of vibration is excessive, pedestrians will stop or leave because of the extremely uncomfort, therefore the main concern of footbridge dynamic design is the normal serviceability. Among them, the peak acceleration is the most important parameter. This paper introduces the basic principle of footbridge vibration and the present research situation of response spectrum method, by leading into the probabilistic response spectrum with certain assurance which is applied in engineering examples, and gives the evaluation of comfort providing a simple and convenient method for the design and calculation of the urban footbridge.

关 键 词：人行桥 反应谱 振动分析 加速度 计算 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]