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为了深入研究上跨宿淮铁路分离式立交的抗震措施,保证其抗震性能,应用有限元软件SAP2000建立了分析模型,分析了立交桥的动力特性,进行了桥梁在小震、中震、大震时的反应谱分析,提出了相应的抗震措施,并进行了验算。研究结果表明:中小跨径桥梁的抗震计算,应根据场地等实际情况确定是否考虑桩-土相互作用;中小跨境桥梁,在桥墩、桥台处采用连梁装置,将上部结构与下部结构合理连接,限制主梁在地震时的纵向位移,在横向设置钢筋混凝土挡块,限制地震时主梁的横向位移,是防止落梁震害的有效手段。
In order to study the aseismic measures of the overpass on Huai-Huai Railway over the Huaihe-Huaihe Railway and to ensure its anti-seismic performance, the analytical model was established by using finite element software SAP2000. The dynamic characteristics of the overpasses were analyzed. During the small, medium and large earthquakes Response spectrum analysis, put forward the corresponding anti-seismic measures, and checked. The results show that the seismic calculation of small and medium-span bridges should be based on the actual conditions of the site to determine whether to consider the pile-soil interaction; small and medium-span bridges, bridge piers, bridges using beam device, the upper structure and the lower structure is reasonable It is an effective way to prevent the girder from damaging the earthquakes by connecting and restraining the longitudinal displacement of the girder during the earthquake and setting the reinforced concrete block in the transverse direction so as to limit the lateral displacement of the girder during the earthquake.