| The tower of wind turbine is the main supporting structure of wind turbine.In the design of wind turbine,it is very important to choose a reasonable tower structure and analyze the force on the selection.At present,the wind turbine which has been put into use is dominated by cone steel tower,but the project cost will increase obviously if the height of the steel tower is raised.Especially when the tower height is over 100 m,steel structure tower needs to increase the thickness of steel plate significantly,which will not only increase the cost of processing,transportation,installation and maintenance of steel tower,but also the problems of aerodynamics and structural dynamics become more and more prominent with the increase of tower height.Hollow interlayer steel pipe concrete component is placed between two concentric tube perfusion between concrete and form the artifacts,because it not only has ordinary concrete filled steel tube good mechanical performance,high bearing capacity,stiffness,good plastic toughness,seismic performance is good,also has light weight,easy to transport and hoisting,and the advantages of can be prefabricated,so has been widely used in the transmission tower.This paper presents study of the mechanical performance of concrete-filled double steel tube(CFDST)wind power to understand the working mechanism,the influence of different factors on mechanical performance are considered and discussed,and mechanical performances of CFDST wind power and traditional steel wind power are compared.The research results show that the flexural stiffness of CFDST can be improved with the increase of hollow ratio.Therefore,appropriately increasing the hollow ratio of the specimen in a certain range is conducive to improve the lateral stiffness.The ultimate bearing capacity of CFDST tower can be increased by about 30% on average,and the displacement response and acceleration response of the tower can be effectively reduced when the traditional steel tower is replaced by CFDST tower.The investigated results from this paper can provide a certain reference for the application of hollow sandwich concrete filled steel tube tower structure in wind power tower. |
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