CAJ | 학술논문

桥上纵连板式无砟道岔采用垂向分层的拼装式结构，道岔板与砂浆层间界面是其薄弱环节。受砂浆材料性能和施工因素等影响，在温度荷载作用下道岔板与砂浆层间易产生层间离缝，从而严重降低了道岔结构的整体性。以18号单开道岔为例，分析了整体温度荷载和温度梯度荷载组合作用下离缝对桥上纵连板式无砟道岔受力和限位性能的影响。采用 ANSYS 有限元软件建立了桥上纵连板式无砟道岔结构计算模型，分别模拟了正常状态下和离缝区域内道岔板与砂浆层的层间界面关系，分析了不同离缝形式和离缝面积对道岔板受力和限位性能的影响。结果表明：道岔板和砂浆层层间局部离缝对道岔板的受力和变形危害不大，但会显著影响砂浆层对道岔板的限位性能；板端和板边离缝形式对道岔板受力和限位性能的影响最显著，板角离缝次之，板中离缝的影响最弱；离缝面积的大小对其有一定影响。本文结论对桥上纵连板式无砟道岔结构的整体性设计的改进具有参考意义。
교상종련판식무사도차채용수향분층적병장식결구，도차판여사장층간계면시기박약배절。수사장재료성능화시공인소등영향，재온도하재작용하도차판여사장층간역산생층간리봉，종이엄중강저료도차결구적정체성。이18호단개도차위례，분석료정체온도하재화온도제도하재조합작용하리봉대교상종련판식무사도차수력화한위성능적영향。채용 ANSYS 유한원연건건립료교상종련판식무사도차결구계산모형，분별모의료정상상태하화리봉구역내도차판여사장층적층간계면관계，분석료불동리봉형식화리봉면적대도차판수력화한위성능적영향。결과표명：도차판화사장층층간국부리봉대도차판적수력화변형위해불대，단회현저영향사장층대도차판적한위성능；판단화판변리봉형식대도차판수력화한위성능적영향최현저，판각리봉차지，판중리봉적영향최약；리봉면적적대소대기유일정영향。본문결론대교상종련판식무사도차결구적정체성설계적개진구유삼고의의。
The longitudinally coupled ballastless welded turnout on bridges is the layered structure in vertical direction.The interface of turnout slab and mortar layer is its weak link.Influenced by mortar material properties and construction factors,there is alienation seam on interface of turn-out slab and mortar layer under temperature load,which will reduce the integrity of the structure seriously.Taking No.18 longitudinally coupled ballastless turnout on bridges for instance,the in-fluence of seam between slab layers on the mechanical behavior and limit location property of the structure is researched under the action of overall temperature load and temperature gradient to-gether.By means of finite clement analytic software ANSYS,the calculation model of the longitu-dinally coupled ballastless turnout structure on bridges is established.The interface relationships between the turnout slab and cement asphalt mortar under the normal state and layer seam aliena-tion condition are simulated,respectively.And the influence of layer seam positions and seam area on the mechanical behavior and restrict capability of the turnout slab is analyzed.Calculation re-sults show as follows:interface connection seam has little impact on the mechanical behavior and deformation of the turnout slab,however,it influences on the limit location property of turnout slab significantly.The seam at the head and at the edge of slab has the biggest influence on the turnout slab's stress and limit location property;the seam at the corner of slab comes second;and the seam at the middle of slab has minimal impact.The conclusion has the reference significance to improve the design integrity of longitudinally coupled ballastless welded turnout on bridges.