铁路简支梁桥墩承受列车制动力的研究

Study on Braking Force on Piers of Simple Supported Railway Bridges

应用结构分析的伪动力法 ,对不同跨度、不同长度的铁路重力式简支梁桥进行了大量计算 ;确定了 16m、2 4m及 3 2m跨度桥梁桥墩可能承受的最大制动力 ,为确定重力式简支梁桥墩制动力设计值提供了理论依据。在此基础上 ,以墩底承受的弯矩为准 。

Numerous calculations are carried out for simple supported railway bridges with different spans and different bridge lengths by means of pseudo-dynamic structure analysis.The maximum braking forces possibly exerting on gravity piers are determined for railway bridges with spans of 16, 24 and 32 meters, providing a theoretical basis to delimit the braking force designing value for simple supported railway bridge piers.It is on this basis that analysis is also made for the safety of piers under the action of braking load according to the moment that the bottom section that a pier bears.