预应力混凝土T型梁横向加固试验研究

Experiment Study on Lateral Reinforcement of PC T-Beams

既有线跨度 33.5m预应力混凝土T型梁横向联结薄弱 ,梁体横向振幅超出桥梁检规限值 ,整体工作性能差 ,影响行车安全 ,不适应提速对桥梁的要求 .本文实施一种将主梁中心距由 1 .8m增大为 2 .0m ,将桥面板连接起来 ,并在桥面板下增设 32处加强隔板的加固方案 。

The weakness of the lateral bracing of existing 33.5 m PC T beams results in their big lateral amplitudes which exceeds the limits of the Bridge Examination Code of China, and thus affects the running safety of trains. In this paper,a scheme was applied, by widening the center to center distance of the beams from 1.8 m to 2.0 m and adding 32 reinforcing diaphragms on the beams in order to strengthen the stiffness of the beams. An experiment has been performed to prove the effectiveness of the scheme.