铁道科学与工程学报2017，Vol.14Issue(10)：2050-2058,9.
高铁荷载下桩-土复合地基振动响应特性研究
Study on dynamic response characteristic of PCC pile-soil composite foundation under high-speed railway train load
摘要
Abstract
In this paper, a composite wave vibration wave (M wave) was used to simulate the moving train load, and a three-dimensional dynamic finite element model of tracks embankment pile-soil composite foundation was established. The dynamic character of embankment and composite foundation was then simulated. The results show that, the vibration response is much stronger near the vibration source. The vibration value decreases with the distance from the vibration source, and it reaches a lower level at the position 24.5 m away from the railway. The vibration amplitude in subgrade is much lower than that in sleeper. The vibration waves are weakened by the energy attenuation when they go through the subgrade, cushion, pile and soils. The vibration amplitude and frequency ranges are influenced as well. The vibration waves filtered by superstructure include low frequencies, which are equal to or lower than the natural vibration frequency of soils. Thus, the vibration response curves of subgrade, pile, foundation reflect the spread law of vibration waves and their vibration character.关键词
PCC桩复合地基/高铁荷载/动力有限元分析/振动响应/幅值谱Key words
PCC pile composite foundation/high-speed train load/dynamic finite element model/dynamic response/amplitude spectrum分类
建筑与水利引用本文复制引用
付强,宋金良,丁选明,蒋志凯..高铁荷载下桩-土复合地基振动响应特性研究[J].铁道科学与工程学报,2017,14(10):2050-2058,9.基金项目
国家自然科学基金高铁联合基金重点资助项目(U1134207) （U1134207）
江苏省自然科学基金资助项目(BK2012811) （BK2012811）
