关键词：设计计算方法 主梁内力 主筋 桥墩
Abstract
In this paper, simply supported railway bridge as an example, the railway bridge beams form the main section, the scope of application, the railway bridge Beam current development at home and abroad, in China's construction technology, design and calculation methods and the advantages and disadvantages. Here focuses on simple beam bridge rail design method.
Beam bridge design methods can be broadly divided into two areas: the design of the main beam and pier design. The design of the main girder is simply supported beam through the selected section forms the main beam to draw cross-section dimensions, and according to design information, application of "concrete structural design," "Bridge," the relevant knowledge and the related codes for load combination, calculate the internal force main beam, select the main reinforcement, and steel and concrete for stress check, and then select the web reinforcement calculations, other construction requirements to meet, but also on the erect steel, reinforcement and distribution of select, the final crack width of the main beam and deflection checking. Pier design include load calculation, the calculation of main and additional force, piers, pier checking the bottom section of the horizontal and vertical checking, and then select bar. At last, in the design process of their feelings and experiences, put forward in the design process needs improvement, and in the future to improve the learning process.
