Effects of Vehicular Loading on Seismic Load of Highway Bridges

车辆荷载对公路桥梁地震荷载的影响

• 批准号: 60550322
• 负责人: KAMEDA Hiroyuki
• 金额: $ 1.22万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550322/
• 关键词: seismic design; seismic load; load combination; bridge design; 動的解析

Dynamic seismic analysis of bridge-vehicle system was performed, from which the dynamic effects of vehicle loading on seismic load of highway bridges were studied. Major conclusions derived from this study are as follows.(1) Dynamic models of a bridge-vehicle system has been developed. On the basis of eigen-analysis and frequency-response analysis, the existence of "resonance modes" and "dynamic reduction modes" has been made clear. The former are cases where the vehicle loading tend to increase the seismic load of bridges, and the latter, vise-versa.(2) From the time history analysis of seismic response of bridge-vehicle system, details of the physical process have been clarified regarding the development of the resonance modes or the vibration reduction modes.(3) Maximum values of major response quantities (displacement, angle of rotation, bending moment, and shearing force) have been obtained, and their characteristics were discussed with emphasis on the effects of vehicle loading relative to the seismic response of bridge alone.(4) Amplification/reduction effects of vehicle loading on seismic loads of highway bridges have been discussed quantitatively, and simple physical parameters have been proposed as descriptors of these effects.

对桥梁-车辆系统进行了动力地震分析，研究了车辆荷载对公路桥梁地震荷载的动力影响。主要研究结论如下：(1)建立了桥梁-车辆系统的动力学模型。在特征分析和频响分析的基础上，明确了“共振模式”和“动力减振模式”的存在。(2)通过对桥梁-车辆系统地震反应的时程分析，阐明了共振振型或减振振型发展的具体物理过程。(3)得到了主要响应量(位移、转角、弯矩、剪力)的最大值。定量地讨论了车辆荷载对公路桥梁地震荷载的放大/减震效应，并提出了简单的物理参数作为描述这些影响的参数。

项目成果

HAYASHI, Taizo: "Dynamic Effects of Vehicle Loading on Seismic Load of Highway Bridges" Kyoto University, Earthquake Engineering Research Report. 87-1. (1987)

HAYASHI, Taizo：“车辆荷载对公路桥梁地震荷载的动态影响”京都大学，地震工程研究报告。

林泰三: 土木学会第41回年次学術講演会講演概要集. 975-976 (1986)

Taizo Hayashi：第 41 届日本土木工程师学会学术会议摘要 975-976（1986）。

林泰三: 京大耐震研究報告. No.87-1. (1987)

林泰三：京都大学地震研究报告第 87-1 号（1987 年）。

HAYASHI, Taizo: "Analysis of Seismic Loads on Highway Bridges with Consideration on Dynamic Effects of Vehicle Surcharge" Proc. of Annual Convention, JSCE. No. 41. 975-976 (1986)

HAYASHI, Taizo：“考虑车辆附加费动态效应的公路桥梁地震荷载分析”Proc。