大边梁加固旧桥的模型试验研究

Test Study of Reinforced Bridge Models with Border beams

针对大边梁加固旧桥方案 ,根据模型相似理论 ,设计和制作了桥梁加固模型 ;并对模型进行荷载试验 ,得到荷载作用下各主梁挠度分布规律。本文提出新的不等刚度梁桥跨中荷载实测横向分布系数的计算方法 ,简化了实测横向分布系数计算过程。模型试验表明 ,大边梁加固桥梁后 ,大边梁承担的荷载比理论计算值还理想 。

Basis of model simulation theory and reinforcing scheme with big border beams,bridge reinforecd model was designed and made.Subsequently the load test was carried through on the model,and the distortion distribution rule of the bridge was acquired.At the same time,the facility calculating method of the load transverse distributing coefficient about vary rigidity beams was put forward firstly in this paper.It was proven that reinforcing method with big border beams was applicable very much from modeltest result.