【作者】 张彬； 赵增欣； 应怀樵； 刘晓平；

【Author】 Zhang Bin;Zhao Zengxin;Ying Huaiqiao;Liu Xiaoping;

【机构】 北京邮电大学； 北京东方振动和噪声技术研究所；

【摘要】 桥体的振动测试在工程测试领域中占有重要的地位,目前环形桥体的振动特性在国内研究不多。本文对合肥市三孝口人行过街天桥实地进行振动幅值和振动频率的测试,主测振幅。选择了桥体南面1/4环部分的跨中和1/4跨两点作为测试点,在这两点上分别布置891-Ⅱ型速度和位移传感器。考虑到模拟实际工况的可行性,为达到最好的振动效果,用50人模拟平时天桥的振动情况实施加栽,采用3种工况进行测试。这3种工况为四端同时上下人,在环形桥面上齐踏步走动,以及无人走动时的天然脉动等。通过各种工况测试结果的对比研究,得出环状桥体的一般振动规律,为以后的工程计算测量提供参考。更多还原

【Abstract】 Vibration test of the bridge plays an important role in the field of engineering test.The annular footbridge vibration characteristics of amplitude and frequency are not studied comprehensively inland.In this paper,we choose the Sanxiaokou footbridge in Hefei,Anhui Province as our testing object.Two measurement points are selected at the quadrant part of the bridge and at its central part,and two 891-Ⅱ velocity sensors are placed at those two points.In order to simulate the actual working condition and get optimal measurements,50 persons are employed to walk on the bridge.Three conditions,such as walking up and down throughout four passageways,on the bridge floor,and nobody walking on the bridge,are taken into account.The four measurements are compared with to get the general vibration patterns of annular footbridges,which provides a reference for further engineering computations,measurements and constructions.更多还原