列车静载作用下双块式无砟轨道应力应变的影响分析-《高速铁路技术》

文章信息/Info

Title:: Influence Analysis of Static Loads of the Train on the Stress-strain for the Double-block Track

Keywords:: double-block|ballastless track|static Loads|stress|strain|influence analysis

摘要:: 文章运用有限元软件，分别建立桥上和路基上双块式无砟轨道道床板的梁-板-板模型，模拟在桥上和路基两种工况静载作用下的应力应变影响情况。经过分析，得出以下结论：（1）双块式无砟轨道，无论是桥上还是路基上、荷载作用在板中还是板边，均对大垂向位移和横向弯矩、纵向弯矩中的正弯矩基本没有影响；（2）荷载作用在板边时，横向应力和纵向应力以及纵向弯矩中的负弯矩较荷载作用在板中时影响较大；（3）研究成果对双块式无砟轨道受力分析及优化设计有一定的借鉴作用。

Abstract:: By the finite element software, beam-slab-slab models of double-block ballastless track on bridge and subgrade are established separately to simulate the effect of stress and strain under static load on subgrade and bridge. The resultsare:(1) The double-block ballastless track, whether on the bridge or on the roadbed, there is no effect on the positive bending moment of the large vertical displacement, the transverse bending moment and the longitudinal bending moment, regardless of the load acting on the middle. (2) When the load is on the edge of the plate, the transverse stress and longitudinal stress and the negative bending moment in the longitudinal bending moment have a greater influence than the load acting on the plate. (3) The results of this study can be used for reference for the stress analysis and optimal design of double-block ballastless track.