Seismic Performance Analysis Of The Concrete Curved Girder Bridge Based On Analytical Method Of PUSH-OVER

The concrete curve girder bridge commonly damaged seriously in earthquake. Based on a concrete curved girder bridge in practical projects, combined with the characteristics of the Bridge, choose the relatively simple and accurate method of Push-over, This paper do a system analysis for the rule of dynamic and seismic response of the concrete curve girder bridge. The research content of This paper as follows:(1)Reference existing research results and relevant literature, this paper arrange the method of Push-over systemly, summarize the basic principle, the basic assumptions,implementation process and the lateral force distribution mode of this method; Meanwhile, applicate the capacity spectrum method of the structural anti-seismic capability evaluation and sum up the analysis process, at last provide theoretical support for this paper's follow-up study.(2) Choose a concrete curved girder bridge in practical projects, establish the space finite element dynamic model with Finite element software, do static checking and verify Its rationality; Do dynamic analysis for the space finite element dynamic model, get the dynamic characteristics (Natural frequency and vibration model) of the structure, analyse the dynamic characteristics and summary its rules, then verify its rationality, Meanwhile, analyze the influence of structural dynamic characteristics when the parameters changed, at last lay the foundation for the Push-over analyse of the concrete curved girder bridge.(3)Establish different height pier finite element model of independence and do Push-over analyse for it, get the V—D relation curves of Basal shear and Pier top displacement, and do analyse for it,at last, analyze the influence of lateral pushover analysis for different Pier height.(4) Establish different radius finite element model of concrete curved girder bridge, and do Push-over analyse for it, get the V—D relation curves of Basal shear and Pier top displacement, and do analyse for it, at last, analyze the influence of Seismic performance for Pier height.for different radius(5)Fold reduction the elastic response spectrum regulations by Rules with Capacity spectrum method, get the spectrum curve of the concrete curved girder bridge, meanwhile, transformat V-D curve to capacity spectrum curve. Combined capacity spectrum curve and spectrum curve, do Seismic capability evaluation for concrete curved girder bridge; Combined with the dynamic and rule of pushover, puts forward damping advice for concrete curved girder bridge.