Response Analysis Of OCS Portal Structure Consider The Initial Geometric Imperfections Under Wind Load

OCS portal structure is made up of gantry steel truss, the catenary wire and someancillary facilities,in recent years, is electrified railway station shares trail widely used on therailway. The current study was limited to consider the deformation of the role of static anddynamic response Ideally,relatively few studies of second-order elastic analysis should beconsidered in the design structure of the initial geometric imperfections.Wind load is OCS portal structure in the main control of the normal work load,currentresearch focuses on the structure of the ideal model.In this article,200to350kilometers perhour passenger dedicated railway OCS portal structure system is the object of study,thestructure-cable model is estanblished with finit element theory as a whole structure,combination of portal structure, characteristics and use conditions,consider different initialgeometric imperfections,different portal structure span,portal-a common cable system andstructure,excluding cable and influence,analysis and discussion of the structure of thevibration characteristics.Baesd on this,the structure of the weight and wind loads,taking into account the structureof the initial geometric imperfections internal forces conducted a simulation analysis,differentstructures span,the different defect values change with or without catenary parameters,theportal structure of the numerical simulation,investigate the variation of the structures’force,atthe same time,a further-reduced tangent modulus method and an equivalent notional loadmethod internal forces of the results of a comparative analysis,computing theory and designmethod for the structure taking into account second order effects,portal structure to betechnologically advanced,economical and reasonable and safe application to provide atheoretical basis.