Study On Effective Length Of Pier

With the development of the cause of highway transportation, the bridge built by themountain area is increasing. Deep gullies and steep slopes, bridge piers tend to be higher dueto the topographic features of the mountain area. Especially due to highway horizontal andvertical alignment requirements continue to increase in the overall design, route indicators,cost and route environment with increasingly improved, in some special terrain, high piersbecome inevitable.“Code for Design of Highway Reinforced Concrete and PrestressedConcrete Bridges and Culverts”(JTG D62-2004) only gives the theoretical boundaryconditions pier Length Factor. Pier values of effective length factor has been plagued by alarge number of engineering and technical personnel, many of the design units tend to use theexperience of the older generation, it is neither conducive to the novice understanding andmemory, and in optimizing the design stage of the formation of a blind spot.Lateral deformation of the pier constraints, the high elastic foundation piers approximatebuckling structure for Bridge Pier Body transverse elastic deformation and basic rigid bodyrotation and translational displacement of the superposition of the introduction of the principleof energy Rayleigh-Ritz method and algorithm, the use of mechanical equilibrium principle,to carry out the following work:(1) Construction state the effective length of the elastic foundation piers;(2) calculate the length of the rigid foundation piers bridge state;(3) calculate the length of the elastic foundation pier bridge state;(4) the calculated length comparative study of finite element analysis with the theoreticalformula solution.Through this study, derived the theoretical formula of the calculated length of the elasticfoundation piers in the state of construction, the length of the completed bridge calculate thelength of the rigid foundation piers theoretical formulas and bridge state calculation of theelastic foundation piers theoretical formula, and with reference to the limited elementchecking its correctness as well as given amendments solution. Finally, VC is prepared apractical calculation software to provide a practical computing technology for engineeringpractice.