横梁分析法在曲线桥结构分析中的应用

The Analysis of Crossbeam Analytical Method in Curved Bridge

平面曲线桥中，由于弯扭耦合作用，横梁对于增强桥梁的结构整体性、加强主梁之间的横向联系、改善主梁荷载横向分配性等起到重要作用，因此设计时不仅要求横梁的刚度要大，还应把横梁作为主要受力构件加以考虑。文章将曲线桥的横梁看作弹性支承在主梁上的多跨连续梁，主梁与横梁形成互为弹性支承的格构，充分考虑弯扭耦合作用的特卢、和横梁自身的变形，首先建立曲线桥横梁分析法的计算力学模型，然后用矩阵位移法推导横梁分析法计算曲线桥的基本公式，最后通过算例验证其可行性和准确性。

In Curved Bridge, the crossbeam plays an important role relative to Straight Bridge. It can strenghten the structure situation as a whole, enhance the horizontal connection among the main beams, and im- prove the horizontal distribution of the load among them, So, in this paper, we analysize the Curved Bridge by means of the crossbeam. The crossbeam is considered of multispan continuous beam supported by the main beams elastically. The main beams and the crossbeams form the structure supPOrted by each other. The property of the crankle coupling and the distortion of the crossbeam itself are both thought over fully. The paper deduces the inter- nal force of crossbeam and the horizontal distribution of the main beams applying the displacement method of struc- ture mechanics.