Unilateral contact buckling of thinwalled steel skin sheet under loading
1.Research Institute of Steel Structures, Nanjing University of Technology, Nanjing， Jiangsu 210009, China； 2.China Zhongyuan Engineering Corporation, Beijing 100083, China)
Abstract：In order to get the influence of inner material stiffness on buckling coefficient of steel skin sheet under unilateral contact, the bimodulus constraint model was adopted to simulate the constraint of inner materials. According to a novel disaplacement function, energy method was used to deduce the buckling coefficient of steel skin sheet by the principle of stationary potential energy. The results show that the buckling coefficient of Kcr is directly proportion to the logarithm of compressive stiffness coefficient of kr1. When kr1 tends to 0, Kcr approaches a constant value and increases with the increasing of adhesive stiffness coefficient kr2. When kr1 tends to ∞, Kcr also tends to be a constant value with remarkable influence by kr2. The result shows that an appropriate increase of adhesive stiffness can significantly increase the buckling coefficient of the steel skin sheet when the compression stiffness stays at a constant value.
2011, Vol. 32 
