When CRTSⅡ ballastless slab track is exposed to high temperature in summer,discontinuous deformation will occur at the end of the track slab,which will damage the track smoothness and thus affect the train safety.To ad-dress the problem of discontinuous deformation at the end of the slab,a non-linear finite element model of CRTSⅡslab track was established by numerical calculation,and the force characteristics of the track were calculated for each scenario of implanting one and two steel bars at the slab end.Finally,the combined effect of reinforcement bond strength and interfacial bond strength on the track was analysed.Numerical calculation results show that:The effect of the implantation of a reinforcement at the end of the slab decreases with the increase of the longitudinal implantation distance and loses its effect on the vertical displacement of the track when it is 150 mm from the end of the slab;The implantation of two reinforcement bars at the end of the slab can effectively suppress the vertical displacement of the track,which is better than the implantation of one reinforcement bar,but with the increase of the implantation spac-ing the implantation stress increases and the safety reserve decreases;The enhancement of reinforcement bond strength and interfacial bond strength has a significant effect on the suppression of track vertical displacement.
关键词
无砟轨道/植筋锚固/有限元模型/数值分析/粘结强度
Key words
ballastless track/plant reinforcing steel bar/finite element model/numerical analysis/bond strength
维普
万方数据