桁橋の自動車走行による不規則振動と衝撃係数
1988 年 1988 巻 398 号 p. 303-309
詳細
1988 年 1988 巻 398 号 p. 303-309
Dynamic responses of highway bridges to moving vehicles are taken into consideration of impact, that is, multiplying static live load by impact coefficient in design codes of bridges. Recently, the effect of road surface roughness on the dynamic response of bridges to moving loads has been paid attention by researchers. The nonstationary random response of bridges to a series of loads is analyzed by means of the theory of random vibration, taking account of the road surface roughness. The effects of natural frequency of bridges and headway between vehicles on the root mean square of random responses of simple girder bridges and continuous ones are discussed. Impact coefficients of girder bridges are proposed on the basis of the analytical results.
