运动荷载作用下Vlazov地基上梁的动力分析  

Dynamic Analysis of Beam Subjected to Moving Load on Vlazov Subgrade

作　　者：颜可珍[1] 吴建良[1] 夏唐代[2] 江毅[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]浙江大学岩土工程研究所,浙江杭州310027

出　　处：《湖南大学学报（自然科学版）》2007年第12期11-14,共4页Journal of Hunan University:Natural Sciences

基　　金：湖南大学自然科学基金重点项目

摘　　要：采用Vlazov地基模型,研究了运动荷载作用下弹性地基上梁的动力响应问题.运用Fourier积分变换和留数定理对动力控制方程进行求解,得到了平面应变条件下覆盖于基岩的均质弹性层和非均质弹性层地基上梁的动力响应解析解,并进一步分析了荷载运动速度、地基厚度及地基非均质性等对梁变形的影响规律.研究结果表明,荷载运动速度、地基厚度及地基土的非均质性对梁的变形影响较大.The Vlazov model was applied to study the dynamic response of beam under moving loads on elastic foundation. The analytical solution of the beam response was obtained by applying the Fourier integral trans-formation and the residue theorem, followed by a comprehensive parametric study to investigate the effects of the subsoil depth, the material stiffness and the load speed on the beam response. The analysis results have indicated that the depth of subsoil and the inhomogeneity of subsoil affect the beam displacement considerably. The model may be applied to understand the dynamic deflection within pavements and railway structures.

关 键 词：运动荷载 双参数地基 梁 Vlazov模型 

分 类 号：TU47[建筑科学—结构工程]