高速铁路桥墩墩顶横向水平位移控制值算法的研究

Research on the Algorithm of Control Value of Transverse Horizontal Displacement of Bridge Pier's Top in High Speed Railway

为指导高速铁路桥梁下部结构的设计,需要根据规范对梁端水平折角的限值来反算桥墩墩顶的横向水平位移控制值。从理论上对目前常用的反算算法进行研究,研究结果表明,常规算法对于常用跨度简支梁(20m、24m、32m梁)是完全适用的,而对于常用跨度连续梁以及梁长与之相近的桥式结构是有局限性的。针对高速铁路常用跨度连续梁提出了修正的反算算法,结果表明修正算法是正确、合理的。

The control value of transverse horizontal displacement of bridge pier's top should be inversely calculated based on horizontal angle limited-value of beam end specified in the design code,so as to guide the bridge substructure design of high-speed railway.The back calculation method which is commonly used nowadays was researched in this paper.The research results showed that common algorithm was completely applicable to simply supported beams with common spans(i.e.20 m,24 m, 32 m),whereas in the case of continuous beam bridges and other types of bridges with similar spans,the applicability was limited.A modified back calculation method was addressed in this paper,and the result showed that the modified method was right and reasonable.