Analysis And Research On The Curved Continuous Rigid Frame With High-pier Of The Shangan Bridge Internal Force

Curved continuous rigid frame bridge with high pier has been used more and more widely in practical engineering because of its advantages such as strong adaptability,simple construction and large span capacity.Due to the existence of bending-torsion-coupled and stability of high pier,the static and dynamic analysis is very complicated.It is necessary to analyze and study the internal force of curved continuous rigid frame bridge with high pier.Aiming at the design of ShangAn bridge in Fujian,Quanzhou,based on consult a large number of relevant documents,combined with my learning on the system of curve bridge with high pier theory and design,and internal force analysis of curved continuous rigid frame bridge with high pier as the core,the following issues were studied.Combined with the actual engineering,the model of fem was established by using Midas/civil.Carried out Static and stability analysis of the model,the spatial characteristics of static and stability of the high pier curve continuous rigid frame bridge at the maximum cantilever stage and the completion stage of the bridge operation are obtained,and changed the geometric parameters——radius of curvature,height of pier,the general law of the static characteristics and the change of the bridge stability is analyzed.To the problem of calculating the radius limit for removing the centrifugal force for the new 15 criterion of bridge,considering the influence of curvature radius and pier height,and through the research on the variation of the internal force of the main girder,the boundary between the radius of curvature and the height of the pier for calculating the centrifugal force of the curved continuous rigid frame bridge of the high pier is summarized;In terms of dynamic mechanical properties,using response spectrum analysis of vibration characteristics and dynamic response of curved continuous rigid frame bridge with high pier,the influence of curvature radius on dynamic performance is studied,and the conclusion is summarized.Through these studies,some practical conclusions are drawn on the static and dynamic aspects of curved continuous rigid frame bridge with high pier,which provides a theoretical reference for the design,construction and monitoring of the bridge.