Study On Nonlinear Analysis Of Tower Crane Structures And Bearing Capacity Of High Strength Plate

Tower crane with high lifting height,large radius of rotation,easy installation and removal of the characteristics of the construction industry has been widely used,has become the construction industry commonly used in construction equipment.As the tower crane works in the outdoor area,the influence of the wind load becomes more and more complicated with the increase of the height of the tower.The variation coefficient of the wind pressure varies exponentially with the change of the ground height,and the nonlinear deformation of the structure becomes more and more obvious,This effect is reflected in varying degrees to the working state and non-working state of the tower crane,mainly in the non-working state of the tower crane.In view of the above background,this paper takes into account the nonlinear deformation of the high-rise structure of wind load,which is different from the traditional calculation method of reducing the wind load to a uniform load within a certain distance according to the change of the wind load with the height of the tower.This is equivalent to the non-uniform load of the trapezoid non-uniform from the top of the tower to the bottom,and derives the nonlinear formula of the horizontal displacement of the tower tower under the non-uniform wind load.The finite element method is used to complete the TC5613 tower crane in this paper,the effects of linear and non-linearity on the static and static stiffness of the tower are studied,and the static stiffness and the static strength of the tower crane are studied.The static and static properties of the tower crane are studied in three different supporting forms.,The geometrical nonlinearity is considered,and the static strength and static displacement of the tower crane under different working conditions are analyzed.And compared with the calculated formula of the theoretical formula,it is concluded that the geometric nonlinearity is the main factor affecting the static strength of the tower crane,and the height of the tower is more and more prominent.At present,there are no new computational theories and calculation methods for the study of the buckling stability of high strength plates.Although the theory of high-strength steel design theory in the "steel structure design specification" has been mentioned,but there is no corresponding experimental and data analysis to do research support,most of the study to stay in the ordinary strength of the plate pressure stability,high strength board Of the compression stability is also a blank area in urgent need of a large number of simulation data for the study to provide data support.Therefore,the finite element analysis of four kinds of simply supported high strength thin plates with different yield strength,different thickness and different rib size is carried out,and the relationship between the buckling critical load and the thickness ratio and the size of the ribs is discussed.