Influence of the Structural Performance of Steel Tubular Scaffold Based on Measured Imperfection

Abstract

In order to study the impact of the measured defects on the structure and properties of steel tubular scaffold, the stochastic finite element theory is used to study the different effects of different defect structure.To accord to the random sampling method, Nine five projects under construction fasteners scaffolding works pipe is measured.In the the live 6m and 3m φ48 × 3.5 specifications 748 pipe wall thickness, diameter, initial bending raw data is random sampling tests. Article establish a structure commonly used rod defects random distribution of pipe wall thickness, diameter and initial bending deviation and the parametric statistical information,through the use of the probability statistical theory and methods,excluding abnormal data. The article explores and studies fasteners scaffolding structure in different fastener tightening torque (30N • m, 40N • m, 50N • m), ideal initial geometric imperfections 3L/1000, and the measured rod defects and defectof the structure carrying capacity and impact analysis, by means of analysis software, the use of the consistent defects modal method and random defects modal method. The results of the analysis show that the pole bending defects affect the carrying capacity of steel scaffolding structure defects . Measured defects affect the steel scaffolding structure, leading to serious security risks. It is necessary to strengthen the control rod defects. The results provide reliable information for the design and construction units.