中文摘要：

针对旧老石拱桥承载力不足、常规加固方法工程代价大的问题,通过模型试验研究了采用＂释能法＂加固对提高无铰石拱桥承载力的影响,得出了释能拱在不同荷载等级作用下的P—ε曲线。分析表明,采用释能法只是改变石拱桥拱脚的约束形式,能够改变无铰拱的受力形态,改善拱圈结构的内力分布,即能实现提高拱桥承载力的目的。表明,采用＂释能法＂加固石拱桥提高其承载力是可行的。

英文摘要：

The old stone arch bridges have the characteristics of low bearing capacity and high reinforcement costs. To improve the bearing capacity of stone arch bridge,the method of ER was adopted during model tests,and pressure-strain curves under different load level were obtained. Research shows that,the method of ER can adjust stone arch bridges internal force of main arch,redistribute the internal force of main arch,and improve bearing capacity by release constraints of arch foot. It shows that the ER method is feasible to improve the bearing capacity of the old arch bridge.