考虑蒙皮效应的钢网壳有限元分析

In this paper, structural static analysis considering material and geometrical nonlinearity is carried out by using the finite element software ANSYS for steel roof with diaphragm or not. Arc-length method is adopted to analyze the whole procedure of load-displacement of the 36-meter steel roof in span length. Then, comparative analysis of ultimate stability bearing capacity within the roof with diaphragm or not will be achieved. In addition, general rules considering the diaphragm effect will be got by analyzing the stress distribution within diaphragm of various thickness produced by the vertical force in the working process. The diaphragm construction can help to strengthen in-plane stiffness and bending moment along strong and weak axis remarkably decrease. Thus, the diaphragm effect will help to effectively control the structural displacement and strengthen its stiffness and strength to some extent. Theory basis of the diaphragm effect for practical engineering will be provided expectedly.