通过在高速铁路正线上开展长期温度荷载下的原位监测和列车制动荷载下的实车试验,以及运用ABAQUS有限元软件的数值计算,进行高速铁路桥上CRTSⅡ型板式无砟轨道倒T型和Ⅱ型台后锚固体系的端刺结构在温度力和制动力作用下的受力变形特性研究.结果表明:在降温和升温过程中,端刺结构周围土体压应力较大值主要出现在主端刺摩擦板的下部和桥台方向首个小端刺的位置,端刺结构变形主要以顶部弯拉为主,整体纵向变形较小；在紧急制动荷载的作用下,钢轨纵向应力、端刺纵向位移均随着轴重的增加而明显增大,但端刺纵向位移绝对值较小,与温度荷载作用相比,紧急制动荷载作用对端刺结构的影响小.%Through in-situ monitoring under long-term temperature load and vehicle field test under train brake load on the trunk line of high-speed railway, by the numerical calculation of ABAQUS finite element software, the stress-deformation characteristics of the end spine structure of both the inverted T-shape and U-shape anchorage systems on CRTS JJ type slab ballastless track on bridge of high-speed railway under temperature force and brake force were studied. The results show that, in the process of heating and cooling, greater compressive stress of soil around end spine structure appears mainly under the friction plate of the main end spine and at the first small end spine in abutment direction. The deformation of end spine structure is mainly flexural tensile on the top and the longitudinal deformation of whole anchorage system is smaller. Under emergency braking load, both the longitudinal stress of rail and the longitudinal displacement of end spine increase obviously with the increase of the axle load. But the absolute value of the longitudinal displacement of end spine is smaller. The effect of emergency braking load on end spine structure is less than that of temperature load.
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