摘要
采用时间域边界元数值方法,分析了隔振沟对列车交通荷载引起建筑物振动的减振效果.2D计算模型中土—结构体系包含铁路路基、地基土体、隔振沟及六层框架建筑物.考虑了土—结构相互作用对填充沟隔振效果的影响及填充沟的几何形状、填充材料特性对结构振动的影响也做了数值分析,计算结果表明:采用隔振沟,可使建筑物框架结构的杆内力减小80%;随填充沟深度、宽度的增加,填充材料相对于周边的土体越软,隔振效果越好.
A numerical investigation on the effectiveness of in-filled trenches in reducing the building vibrations due to passing trains is presented.Particularly,a two-dimensional soil-structure system containing the cross-section of a railway embankment,the underlying soil,a trench barrier and a nearby six-storey building is considered.For the analysis,a time domain coupled boundary element—finite element algorithm is employed.This model completely considers the soil-structure interaction effects and directly determines the effect of the wave barrier on the structural response.The effects of geometrical and material properties of the trench and its backfill material on the structural response are investigated.The results point out that using a trench barrier,a reduction level up to 80% of the building vibration and internal forces can be achieved.Increasing the depth or the width of a trench may improve its reduction effect and a softer backfill material results in a better isolation effect.
出处
《南昌工程学院学报》
CAS
2011年第3期9-14,共6页
Journal of Nanchang Institute of Technology
基金
国家自然科学基金资助项目(50578071)
江西省教育厅青年科学基金项目(GJJ09367)
南昌工程学院首批大学生科研训练计划项目
关键词
移动荷载
边界元—有限元耦合
填充沟
建筑物隔振
moving loads
coupled boundary element—finite element algorithm
in-filled trenches
building vibration attenuation
