Development of model for comprehensive environmental assessment of bridge vibration induced by traveling vehicles.

桥梁行驶车辆振动综合环境评价模型开发

• 批准号: 11650476
• 负责人: YOKOYAMA Koichi
• 金额: $ 1.86万
• 依托单位: Ibaraki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650476/
• 关键词: infrasound; bridge vibration; traffic-induced pollution; road bump; environmenrtal assessment model; vibration prediction

Traveling of vehicles on highway bridges causes bridge vibration. The bridge vibration propagates in the ground through bridge foundation and in the air through bridge superstructure. These ground-bone vibration and air-bone vibration seem to affect sometimes people's life and health. Ground vibration, one of the specific items in the environmental assessment, has prediction method and evaluation method and various kinds of countermeasures have been studied. On the contrary, infrasound that is defined air-bone vibration with 1-80Hz components is not included in the specific items but included in the important items in the assessment in our country at present. Then prediction method and evaluation method of infrasound have not been established.This study aims to develop a comprehensive model for assessment of bridge vibration caused by traveling of vehicles.1) Study of characteristics of bridge vibrationTime-series analysis and FFT analysis were conducted using data of bridge vibration, … More ground vibration, infrasound and noise measured at the highway bridges in order to study bridge vibration characteristics, namely the dynamic response of bridge members caused by traveling of vehicles near expansion joint and effects of structural conditions on the spatial distribution of infrasound.2) Mechanism of generation and propagation of infrasoundInfluence of structural conditions was clarified on the bridge vibration induced by traveling of vehicles over bump and amplification characteristics of transfer of bridge vibration into infrasound in frequency domain.3) A model of assessment of infrasound induced by bridge vibrationIt is required for the assessment of infrasound to clarify the generation model of bridge vibration because infrasound is induced by bridge vibration caused by traveling of vehicles. Therefore, precise simulation model of bridge vibration is developed in this study in order to utilize assessment of infrasound. Numerical analysis using this simulation model was conducted to study the effects of structural conditions of bridges and dynamic properties of vehicles on infrasoand. Less

车辆在公路桥梁上行驶会引起桥梁振动。桥梁振动通过桥梁基础在地面传播，通过桥梁上部结构在空气传播。这些地骨振动和气骨振动有时似乎会影响人们的生命和健康。地面振动作为环境评价的具体项目之一，有预测方法和评价方法，并研究了多种对策。相反，次声，即1-80Hz分量的气骨振动，目前在我国的评估中并未列入具体项目，而是列入了重要项目。次声波的预测方法和评价方法尚未建立。本研究旨在开发一种综合模型来评估车辆行驶引起的桥梁振动。1）桥梁振动特性研究利用公路桥梁实测的桥梁振动、地面振动、次声波和噪声数据进行时间序列分析和FFT分析，研究桥梁振动特性，即桥梁的动力响应。 2) 次声产生和传播的机理，阐明了结构条件对车辆越过路面行驶引起的桥梁振动的影响，以及桥梁振动在频域中传递到次声的放大特性。 3) 桥梁振动引起的次声评估模型 由于次声是由车辆行驶引起的桥梁振动引起的，因此进行次声评估，以明确桥梁振动的产生模型。因此，本研究开发了桥梁振动的精确模拟模型，以便利用次声评估。使用该仿真模型进行数值分析，研究桥梁结构条件和车辆动力特性对地下的影响。较少的

项目成果

横山功一,川崎聖: "弾性支承による交通振動低減可能性"第23回日本道路会議・一般論文集. (B)・6086. 418-419 (1999)

Koichi Yokoyama、Sei Kawasaki：“通过弹性轴承减少交通振动的可能性”第 23 届日本道路会议论文集 (B)·6086 (1999)。

横山功一,川崎 聖: "弾性支承による交通振動低減可能性"第23回日本道路会議・一般論文集 (B). 418-419 (1999)

Koichi Yokoyama、Sei Kawasaki：“通过弹性轴承减少交通振动的可能性”第 23 届日本道路会议论文集 (B) 418-419 (1999)。

Yokoyama, K.and Kawasaki, S.: "Feasibility of reduction of traffic-induced bridge vibration by means of elastic shoes'"Proceedings of the 23th Japan Road Conference, Japan Road Association. (B)-6086. 418-419 (1999)

Yokoyama, K. 和 Kawasaki, S.：“通过弹性鞋减少交通引起的桥梁振动的可行性”，第 23 届日本道路会议记录，日本道路协会。