THE DESIGN AND COMPUTATION APPROACH OF STEEL-CONCRETE COMPOSITE COLUMNS

Integral hoisting is employed in the construction of No.10 hangar of China Southern Airline. As the main support members during the process of integral hoisting, the steel -concrete composite columns are loaded almost eccentrically and they are formed by steel latticed columns and concrete rectangle_section columns, Because of few researches on the stability of the composite columns up to now, their stability analysis is focused mainly on the study. A FEM associated Code for Design of Steel Structures(GB 50017-2003) is presented, where the critical loads of the composite columns are determined by FEM, and global stability check is carried out according to the code. In addition, the full load_displacement curves of composite columns are achieved by using a large_deflection plastic FEM, and from these curves the load_carrying capacity and stiffness requirements of the composite columns can be evaluated correctly. It is approved by the construction practice that the steel-concrete composite columns do work very well and the integral hoisting has been accomplished safely.