The Study On The Mechanical Behavior Of The Through-type Reinforced Concrete Tied Arch Bridge On Qing-jia Highway

With the development of China’s economic and technological level and the continuous improvement of comprehensive national strength,in recent years,China’s bridge construction has made remarkable achievements,tied arch bridge as one of the rapid development of bridge in recent years,its appearance and span beyond Therefore,it is of great theoretical and practical value to study the dynamic and static performance of tied arch bridge.The geometric nonlinearity,material nonlinearity,concrete shrinkage and creep effect and temperature effect of the long-span tied arch bridge are obvious,which will make the behavior analysis of the tied arch bridge become very complicated.In addition,the construction process of tied arch bridge is complex and the construction precision is high.Therefore,only the systematic force analysis of bridge arch bridge construction stage and bridge operation stage can ensure the safety,applicability and safety of the bridge in the whole life cycle.Durability.In this paper,the structural characteristics and load-bearing performance of the through-type reinforced concrete tied-arch bridge are studied in detail,which provides a useful reference for the design and construction of the same type of bridge.In this paper,the three-dimensional mechanical model of full-bridge,arch-foot node and boom anchorage zone is established by using the finite element software MIDAS Civil and ANSYS.Based on the full-bridge model,Reinforced concrete Tied Arch Bridge in different construction stages of the various components of the bridge’s performance and the entire bridge structure of the security and stability of qualitative.The results show that the bearing capacity of the bridge structure,the displacement of the concrete stress and the control section and the stability of the arch rib structure meet the relevant requirements during the whole construction process.The bridge structure satisfies the requirements of the whole life-,Dynamic load of the requirements of the bridge structure,safety,applicable and durable.The three-dimensional solid mechanics model of the arch foot and the anchorage zone of the boom is used to study the local stress behavior of the bridge arch foot and the anchorage zone of the short boom at the completion of the bridge operation.The results show that the load,The stress and displacement of the complex and sensitive area such as the arch foot node and the short boom area meet the requirements of the relevant specification.The reinforcement structure complies with the law of structural stress distribution,so it meets the requirements of safety and applicability.In this paper,the structural behavior of the reinforced concrete tied-arch bridge is clearly demonstrated,the distribution of the force is reasonable,the dynamic performance and the seismic capacity are high.The bridge type has good in-plane and out-of-plane stability.