基于随机振动理论的桥梁舒适度研究  

Research on Bridge Comfort Based on Random Vibration Theory

作　　者：谭岩斌 张―哲 王会利 王―麒[3] TAN Yanbin;ZHANG Zhe;WANG Huili;WANG Qi(Faculty of Infrastructure Engineering Dalian University of Technology,Dalian,China,116023;State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian,China,116023;China Construction Zhongyuan Architectural Design Institute Co.Ltd.,Zhengzhou,China,450004)

机构地区：[1]大连理工大学建设工程学部,辽宁大连116023 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023 [3]中建中原建筑设计院有限公司,河南郑州450004

出　　处：《沈阳建筑大学学报（自然科学版）》2020年第4期585-592,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51978130);辽宁省自然基金指导计划项目(2019-ZD-0145)。

摘　　要：目的为了更全面地评价桥梁结构人致振动的舒适度,完善人行桥振动评价指标.方法以随机振动理论为基础,通过某人行斜拉桥的现场检测和随机振动分析,提出采用人行桥结构振动响应最大部位的加速度均方根值作为舒适度评价指标,对比现行加速度峰值评价指标和笔者提出的加速度均方根值评价指标的异同.结果当采用结构响应最大处的加速度值评价舒适度时,随机振动理论分析值和现场实测值差异不大.通过安装TMD阻尼器前后对比减振效果,对于加速度峰值,最小减振率为15.69%,最大减振率为41.78%,平均减振率为28.39%;对于加速度均方根值,平均减振率为22.37%,与峰值加速度数据结果相近.结论与加速度峰值评价指标相比,采用加速度均方根值作为舒适度评价指标是基于随机振动理论,考虑了振动响应的整个时间历程,更加全面合理.In order to evaluate the comfort of human-induced vibration of bridge more comprehensive and improve the evaluation index of pedestrian bridge vibration,the root mean square of acceleration is proposed as comfort evaluation index.Based on random vibration theory,the root mean square of acceleration at the point of the maximum vibration response of the bridge is put forward as comfort evaluation index.Through the on-site testing and random vibration analysis of a pedestrian cable-stayed bridge,the traditional peak of acceleration evaluation index and the root mean square of acceleration index are compared.If the root mean square of acceleration is adopted to evaluate comfort,the theoretical analysis value of random vibration is close to the field measured value.Comparing the damping effect before and after installing the TMD damper,for the peak acceleration,the minimum damping rate is 15.69%,the maximum damping rate is 41.78%,and the average damping rate is 28.39%;for the root mean square of acceleration,the average damping rate is 22.37%,which is similar to the peak acceleration data.The results show that the root mean square of acceleration index is more comprehensive and reasonable than the traditional peak of acceleration evaluation index because it considers the whole-time history of the vibration response.

关 键 词：斜拉桥 随机振动 加速度均方根值 舒适度 

分 类 号：TU391[建筑科学—结构工程]