套箍加固法在拱桥中的应用

Application of Cuff Method In Arch Bridge

主要研究套箍加固法在拱桥中的应用,以石泉桥为研究工程背景,对该桥采用拱圈套箍加固法,并对其在加固前与加固后分别进行有限元理论分析。通过对结构加固前后的承载能力极限状态组合强度验算、稳定性验算及结构在一阶模态频率对比研究,得出拱圈在加固后,其强度得到提高,刚度显著增大,可以满足通行时强度、刚度等要求,结构安全可靠。为今后旧桥加固提供参考依据。

This paper presents the effects of hoop method applied in arch bridge which is located in and named Shiquan. The finite element models of the original bridge and the hoop reinforced bridge are established individually,and the comparison study are conducted to analyze the influences from the hoop reinforcement method. By explicitly comparing the ultimate capacity state combined strength checking,stability checking and first order modal frequency,it is figured out that the strength of this studied bridge become higher while the stiffness of it increases significantly. It is indicates that the hoop reinforcement bridge can meet the traffic requirements of strength and stiffness and the assurance of the structural safety and reliability which provide a reference for the reinforcements of the old bridges in the future.