铁路四线桥梁曲线计算方法研究

针对目前铁路桥梁设计中四线桥曲线计算困难的情况,考虑T梁+箱梁+T梁、8片T梁和两片箱梁等多种上部结构模式,求解梁宽-线间距-里程构成的强耦合体系,得出曲线计算结果,并扩展到N线并置的情况。另外对于边置的T梁,如何保证其严格按平分中矢布置,以确保梁体横向的受力均衡,也是研究过程中的另一个难点。

Research on Calculation Methods for Curve Elements of Four-track Railway Bridge

In view of the difficulties in calculation of curve elements for four-track railway bridge during the design of railway bridges, various modes of superstructures such as T-beam ＋box beam ＋ T-beam, 8 T-beams and 2 box beams have been taken into consideration, to get solutions for the strong coupling system consisting of beam width, distance between track center lines, and chainage, so as to achieve the calculation results of curves, and furthermore the cases with coexisting of multiple.tracks. As for side-allocated T-beam, how to make sure it＇s strictly arranged according to bisection vector height so as to ensure the balance forcing in transverse direction of the beam body is another difficult point during research.