CAJ | 학술논문

双块式无砟轨道在外界荷载作用下，连续道床板容易开裂形成裂纹，裂纹的产生会降低道床板的耐久性和承载能力，影响双块式无砟轨道在服役期间的使用与安全性。当连续道床板出现裂纹时，应该采取措施来维持双块无砟轨道的正常的使用和耐久度。基于有限单元法，建立含道床板贯通裂纹的双块式无砟轨道梁体模型，分析最不利荷载作用时所适合的修补材料，以期为双块式道床板裂缝维修提供一定的理论基础。研究表明：不同宽度裂纹对维修材料性能要求不同，随着裂纹宽度的增加，材料所受到的拉应力越小，越小宽度的裂缝对材料的延伸率要求越高。
쌍괴식무사궤도재외계하재작용하，련속도상판용역개렬형성렬문，렬문적산생회강저도상판적내구성화승재능력，영향쌍괴식무사궤도재복역기간적사용여안전성。당련속도상판출현렬문시，응해채취조시래유지쌍괴무사궤도적정상적사용화내구도。기우유한단원법，건립함도상판관통렬문적쌍괴식무사궤도량체모형，분석최불리하재작용시소괄합적수보재료，이기위쌍괴식도상판렬봉유수제공일정적이론기출。연구표명：불동관도렬문대유수재료성능요구불동，수착렬문관도적증가，재료소수도적랍응력월소，월소관도적렬봉대재료적연신솔요구월고。
Under the action of external load, the continuous track slab of bi-block ballastless track is likely to crack. The cracking will reduce the durability and carrying capacity of the track slab. Still more, the cracking may also affect the usability and safety of the bi-block ballastless track during service. For this reason, when cracking appears at the continuous track slab, some repairing measures should be adopted to maintain both the normal use and the durability of the bi-block ballastless track. Based on finite element method, this paper established a beam-solid model of bi-block ballastless track which contained some through-cracks at the track slab, and analyzed the most suitable repair materials for the crack repairing under the action of the most unfavorable loads, in the hope of providing theoretical bases for crack repairing of track slab of bi-block ballastless track. The research shows: the requirements on repair material’s performance will be different corresponding to the different crack widths. With the increase of the crack width, the tensile stress of the material will decrease. The smaller the crack width is, the higher the elongation percentage requirement of the material becomes.