CAJ | 학술논문

桥上CRTSⅡ型板式无砟轨道设计时采用“线-板-桥-墩”空间一体化模型计算纵向力，模型中轨道板与纵连底座板简化为一层复合结构。建立一种桥上CRTSⅡ型板式无砟轨道“线-板-板-桥-墩”空间一体化模型，将轨道板与纵连底座板分别模拟，并通过砂浆阻力相互作用，模型采用有限单元法求解。采用两种模型对一座大跨连续梁桥上纵连底座板的制动力和伸缩力进行对比计算。结果表明，纵连底座板的制动力和伸缩力采用“线-板-板-桥-墩”空间一体化模型的计算结果更小，纵连底座板配筋设计采用“线-板-桥-墩”空间一体化模型具有更高的可靠性。
교상CRTSⅡ형판식무사궤도설계시채용“선-판-교-돈”공간일체화모형계산종향력，모형중궤도판여종련저좌판간화위일층복합결구。건립일충교상CRTSⅡ형판식무사궤도“선-판-판-교-돈”공간일체화모형，장궤도판여종련저좌판분별모의，병통과사장조력상호작용，모형채용유한단원법구해。채용량충모형대일좌대과련속량교상종련저좌판적제동력화신축력진행대비계산。결과표명，종련저좌판적제동력화신축력채용“선-판-판-교-돈”공간일체화모형적계산결과경소，종련저좌판배근설계채용“선-판-교-돈”공간일체화모형구유경고적가고성。
Longitudinal forces are calculated by ‘rail-slab-beam-pier’ three-dimensional mechanical model to design CRTSⅡ slab track on the bridge, and the slab and longitudinally connected concrete base board ( LCCBB ) are simplified to a composite layer in the model. In this paper, a ‘rail-slab-board-beam-pier’ three-dimensional mechanical model of CRTSⅡ slab track on bridge is established, in which slab and LCCBB are simulated respectively and interacted by resistance of mortar. The solution of the model is obtained with the finite element method. Based on two mechanical models, forces of LCCBB on a continuous beam bridge caused by train brake or bridge expansion are calculated contrastively. The results show that longitudinal forces of LCCBB caused by train brake or bridge expansion are smaller by using ‘rail-slab-board-beam-pier’ three-dimensional mechanical model. The design of the reinforcement of LCCBB is much more reliable by using ‘rail-slab-beam-pier’ three-dimensional mechanical.