CAJ | 학술논문

高墩大跨桥梁桥墩整体在太阳辐射下升温，会使桥墩顶部产生竖向位移。对桥墩升温产生竖向位移对无缝线路的影响这一问题，使用有限元软件建立线-桥-墩一体化模型，分析高墩升温条件下桥上无缝线路的受力及变形。计算结果表明：桥墩的升温对桥墩受力影响较小，桥墩温度变化引起的线路竖向不平顺主要是长波不平顺。建议高墩大跨桥梁不考虑桥墩整体温度变化对线路受力的影响，但要对桥墩变形引起的竖向不平顺进行检算，以满足规范对桥上无缝线路验收的需要。
고돈대과교량교돈정체재태양복사하승온，회사교돈정부산생수향위이。대교돈승온산생수향위이대무봉선로적영향저일문제，사용유한원연건건립선-교-돈일체화모형，분석고돈승온조건하교상무봉선로적수력급변형。계산결과표명：교돈적승온대교돈수력영향교소，교돈온도변화인기적선로수향불평순주요시장파불평순。건의고돈대과교량불고필교돈정체온도변화대선로수력적영향，단요대교돈변형인기적수향불평순진행검산，이만족규범대교상무봉선로험수적수요。
The rising of temperature of pier of large-span bridge with high-pier under solar radiation will lead to vertical displacement on the top of pier. This paper addresses the influence of this vertical displacement on jointless track by analyzing the stress and displacement of jointless tack under the rising temperature of high pier with an integrative line-bridge-pier finite element model. The calculation results show that the force is very small when pier temperature rises, and the vertical track irregularity caused by temperature variation of pier is of mainly long wave. It is suggested that the overall influence of pier temperature variation on jointless track is not necessarily to be considered, but the vertical track irregularity caused by pier deformation shall be checked so as to meet the requirements of the standard for the acceptance of jointless track on bridge.