CAJ | 학술논문

为研究制动力作用下高速铁路简支梁桥与CRTS Ⅱ型板式无砟轨道的相互作用问题，以沪昆高铁上某12×32 m双线简支箱梁为工程背景，建立考虑钢轨－轨道板－底座板－梁体－墩台的一体化有限元模型，系统分析单线制动和双线同向制动工况下轨道和桥梁结构的受力及变形规律。研究结果表明：钢轨制动力及位移对加载位置极为敏感，检算时应考虑多种荷载位置的影响；单线制动作用下钢轨与轨道板相对位移、CA砂浆剪切位移、桥梁和底座板相对位移均处于弹性范围内；当车辆在桥上靠近桥台处制动时，摩擦板可有效地减少传递至路基段的纵向力；双线同向制动作用下各项效应与单线制动有载侧趋势相同，桥梁和底座板将发生相对滑动。
위연구제동력작용하고속철로간지량교여CRTS Ⅱ형판식무사궤도적상호작용문제，이호곤고철상모12×32 m쌍선간지상량위공정배경，건립고필강궤－궤도판－저좌판－량체－돈태적일체화유한원모형，계통분석단선제동화쌍선동향제동공황하궤도화교량결구적수력급변형규률。연구결과표명：강궤제동력급위이대가재위치겁위민감，검산시응고필다충하재위치적영향；단선제동작용하강궤여궤도판상대위이、CA사장전절위이、교량화저좌판상대위이균처우탄성범위내；당차량재교상고근교태처제동시，마찰판가유효지감소전체지로기단적종향력；쌍선동향제동작용하각항효응여단선제동유재측추세상동，교량화저좌판장발생상대활동。
The 12 multiply by 32 m double-track simply-supported box beam in the Shanghai-Kunming rail-way was cited as an example to study the track-bridge interaction between the high-railway simply-supported bridge and CRTS Ⅱballastless track under braking force.The integration finite element model of rail-beam-slab-base board-pier was established to analyze the law of stress and deformation on the structures under the condition of single and double lines braking.The research results show that,the braking force and displacement of trail are extremely sensitive to loading position,and hence various load positions should be considered;under the load of single line braking,the displacement between rail and slab,shear displacement of CA mortar and the displacement between bridge and bedplate are in the elastic range;when the train brakes near the bridge abut-ment,the friction plate can decrease the longitudinal force transmitting to the subgrade section effectively;the a-bove-mentioned effects of track under the case of braking on both lines are similar with the loaded track under the case of braking on a single line,and relative sliding will occur between bridge and bedplate as well.