石拱桥检测及承载能力修正

Detection and Bearing Capacity Modification of Stone Arch Bridge

为探讨对石拱桥承载能力进行修正的实际意义,以一座七十年代的石拱桥作为工程实例,对其进行检测及技术状况评定,评定结果表明该桥为4类危桥,同时对该桥进行有限元建模分析,再引入变形状况、动力性能等指标,引入检算系数、截面折减系数,对有限元计算模型计算结果进行了折减修正,结果表明该桥承重能力计算值经修正后明显不足,需进行加固处治。

To explore the practical significance of modified carrying capacity of stone arch bridge,a 1970 s stone arch bridge is made as an engineering example,inspection and the technical condition assessment were carried out.The assessment results showed that the bridge belong to type 4 dangerous bridge,the finite element model of the bridge was developed,and the deformation and dynamic performance index was also analyzed,introduce checking calculation coefficient,section reduction coefficient,the calculation of finite element model of the reduction correction,the results show that the bridge bearing capacity is obviously insufficient,needs reinforce treatment.