The Research Of Contact Force Distribution Of Pin Connection For Large Steel Structure Joint

Along with the development of architectural structure, more and more pin connection applied in architectural structures, often used in Column Base,joint and other key parts of large steel structure. The structure form of pin connection is onefold, It is usually three ear plate double shear structure. This is typical pin connection structure form. Domestic often used simplified calculation method to study pin connection structure, or study pin connection under certain conditions, and do no further research on influencing factors of contact force, this paper deeply studied several influencing factors of contact force distribution, determined the two major factor that is ratio of pore size and the thickness of ears plate and load size are main influencing factors to contact force distribution of typical pin connection in architecture structure. This paper do finite element contact analysis of typical pin connection focus on this two main influence factors, trying to find out in what degree the two factors influence contact force distribution of pin Connection. This paper wish to provides theory basis for design and research on pin and pin hole in architectural structures.The research in this paper get the following conclusions:(1) Contact force distribution area the along the radial of typical pin connection range 45°to 135°.(2) When pin connection bear mainly by shear force, contact force distribution curve change little along with load; when pin connection mainly occur bending deformation, contact force distribution curve change great along with load.(3) Through the comparison of the influence of different ratio of pore size and the thickness of ears plate to contact force distribution, we found that when the ratio of pore size and the thickness of ears plate is greater than 12:1 the contact force distribution curve changes little; when the ratio of pore size and the thickness of ears plate is less than 12:1, contact force distribution curve changes greatly. If the load keep increasing, pin connection may damage by bending deformation.