CAJ | 학술논문

由自编程序 VLS( Vehicle Load Spectrum)构造随机车辆荷载谱，利用有限元程序将密集运行状态下的随机车辆荷载谱加载于钢筋混凝土简支空心板桥上，模拟桥梁在车辆荷载通过时的动力响应，分析了桥梁不同位置在车辆荷载作用下的反应，得出了位移时间历程曲线和加速度时间历程曲线。分析表明车辆荷载作用下桥梁整体振型复杂，最大位移不完全发生在跨中节点处，危险点存在于跨中一段范围内，且不同板块振动情况差别较大，中间板块由于边缘板块的约束作用而振动较弱。
유자편정서 VLS( Vehicle Load Spectrum)구조수궤차량하재보，이용유한원정서장밀집운행상태하적수궤차량하재보가재우강근혼응토간지공심판교상，모의교량재차량하재통과시적동력향응，분석료교량불동위치재차량하재작용하적반응，득출료위이시간역정곡선화가속도시간역정곡선。분석표명차량하재작용하교량정체진형복잡，최대위이불완전발생재과중절점처，위험점존재우과중일단범위내，차불동판괴진동정황차별교대，중간판괴유우변연판괴적약속작용이진동교약。
The paper develops a Vehicle Load Chart program ( VLC program ) ,with the purpose of producing random vehicle load spectra. And with the help of finite-element program,the spectra in dense operation period is imposed to the reinforced-concrete simply-supported hallow slab bridge,to simulate its dynamic responses under vehicle loading. From the experiment,the reposes of the different sections of the bridge are analyzed and the patterns are concluded in the displacement-time curve and the acceleration-time curve. The results show that the analysis of the overall oscillation mode has found to be difficult,as the maximum value of displacement does not take place at the mid-span panel joints and the hazardous points can be found within certain section of the mid span. At the same time,the oscillations of different slabs display distinctively different patterns,while the mid slab oscillates at a fairly small amplitude due to the restraint of the edging slabs.