The Discussion Of Grid Structure’s Acceptance Standard

Grid structure outer loads failure or destroy, mainly because of some components andnot lose stability accept more of the internal force or internal force decreases, and causeinternal force distribution grid components of other components have heavy instability, and inthe structure appeared in the spread of bucking instability, eventually lead to the entirestructure failure or collapse. Make grid structure failure except the initial defects such asresidual stress, node and component initial bending the eccentric, excessive axial force of themain factors.Based on the summarization of many years of steel structure limit load of the detectionon the basis of the research, in conjunction with the relevant standards regulations andanalyses the stress process of steel components, again through the space grid structure is finiteelement method determined to limit load, namely first determine grid structure component inthe axial force under the action of carrying whole process curve, and to establish the curveaxial force stem nonlinear mathematical model, this model of nonlinear stiffness matrixcomponent unit, and the whole structure of the whole nonlinear analysis, for each level ofthee load node displacement and intermal force, According to the method of nonlineartracking analysis, until the whole grid structure failure, can get the limit load of the structure.Revision relevant technical standards and grid structure standard, this paper discussedthe related problems can be used as a reference.