【摘要】 针对三座大跨度桥（A桥和C桥为悬索桥、B桥为斜拉桥）分别建立有限元模型，分析在温度、沉降、风、列车等作用下的桥面整体变形波长特征，并采用HHT(Hilbert-Huang Transform)法、中点弦测法和曲率半径法定量分析桥面变形波长。结果表明：A桥在整体升降温作用下，产生的变形曲线为波长82～140 m、波幅不超过5.5 mm的曲线段；在静风荷载作用下，产生的变形曲线为波长97～140 m、波幅不超过5.4 mm的曲线段；桥塔沉降作用下A桥不产生显著变形曲线。上述三种荷载作用下B桥均不产生显著变形曲线。C桥在整体升降温作用下，产生的变形曲线为波长70～84 m、波幅不超过2.2 mm的曲线段；桥塔沉降和静风力作用下C桥均不产生显著变形曲线。列车全局荷载对三座桥的桥面变形产生影响，若关注幅值3 mm及以上的曲线段，A桥、B桥、C桥最短波长依次为66、93、53 m。就此三座桥梁而言，荷载引起的桥面垂向变形对行车性能影响的显著程度均依次为列车全局荷载、整体升温、桥塔沉降。更多还原

【Abstract】 In this paper, the overall deformation wavelength characteristics of A, B and C bridges under the effect of temperature, settlement, wind and trains were analyzed, and the deformation wavelengths of the bridge deck were quantitatively analyzed by HHT(Hilbert-Huang Transform) method, midpoint chord measurement method and radius of curvature method. The calculation results show that the curves with wavelengths 82 ～ 140 m and amplitude no more than 5.5 mm are generated under the effect of overall rising and cooling of bridge A. Under static wind loads, the curves with wavelengths 97 ～ 140 m and amplitude no more than 5.4 mm are generated. The tower settlement doesn’t produce significant deformation curves for A bridge. The above three kinds of loads doesn’t produce significant deformation curves for B bridge. Under the effects of overall rising and cooling, C bridge generated curves with the wavelengths of 70 ～ 84 m and the amplitude of no more than 2.2 mm. There are no significant deformation curves of bridge C due to tower settlement and static winds force. The global train loads have impacts on the deck deformations of the three bridges. If the curves with the amplitude of 3 mm and above were concerned, the shortest wavelengths of bridge A, bridge B and bridge C are 66, 93 and 53 m respectively. For these three bridges, the significant degree of impacts of load-induced vertical deck deformations on running performance are the global train load, the overall temperature rise, and the settlement of the bridge tower.更多还原