APPLICATION OF 3D VISCOUS-SPRING ARTIFICIAL BOUNDARY ELEMENTS IN DYNAMIC RESPONSE INDUCED BY HIGH-SPEED TRAIN ALONG THE SLAB TRACK
Subgrade deformation produced by high-speed railway has been limited more and more strictly, therefore the analysis of subgrade dynamic response is of great importance. Based on the theory of elastic waves in the near field, the theory of 3D consistent viscous-spring artificial boundaries (VSAB) and viscous-spring boundary elements were introduced in the use of ABAQUS software to model soil vibrations due to high-speed trains on subgrade.The accuracy and validity of artificial boundaries in inner-source were validated by example. Finite element meshes include rail, track board, concrete support layer, concrete base, subgrade and foundations, which were simulated by solid elements. A series of continuous moving axle loads were used to simulate a moving high-speed train loads. Along the mesh boundaries of proposed 3D model, the consistent VSAB were employed to avoid fictitious wave reflections. The slab track parameters of Sui-Yu line were used to calculate the dynamic stress and deformation, the model is validated by comparing with the field data of high-speed train at the Sui-Yu line. These comparisons show that a high degree of precision and adequate stability can be achieved. The successful application in general finite program of this 3D artificial boundary and viscous-spring boundary elements promote the computing efficiency, which made the 3D numerical simulation become more easy and convenient, and can be used simply on private computer. Further work is needed to study the plastic accumulated deformation of ballastless railway under long-term cyclic load by the proposed model.
High-Speed Railway Subgrade Dynamic Response Consistent Viscous-Spring Artificial Boundaries Consistent Viscous-Spring Artificial Boundary Elements ABAQUS
L.DONG C.G.ZHAO D.G.CAI
School of Engineering and Architecture, Beijing jiaotong University, Beijing, 100044, China Railway Engineering Research Institute, China Academy of Railway Sciences, Beijing, 100081, China
国际会议
第三届中日岩土工程研讨会(Proceedings of the 3rd Sino-Japan Geotechnical Symposium)
重庆
英文
135-144
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）