Original scientific paper

https://doi.org/10.17559/TV-20210422055418

Structural Stability Analysis of Steel Tubular Scaffold with Couplers Based on Direct Analysis Method

Junce Zhang ; School of Civil Engineering and architecture, Xi'an Technological University, Xi'an 710021, China
Fankui Zeng* ; School of Civil Engineering and architecture, Xi'an Technological University, Xi'an 710021, China
Huan Ma ; School of Civil Engineering and architecture, Xi'an Technological University, Xi'an 710021, China

Abstract

Direct analysis method (DAM) is a second-order nonlinear analysis approach widely used for its high accuracy and simple flow. It is suitable for pinpointing the internal force response and nonlinear behavior of steel tubular scaffold with couplers (STSC), which has large initial defects arising from repeated use. This paper firstly quantifies the initial defects of steel tubes of the scaffold and draws the column curves of the tubes with different initial bending and residual stresses. On this basis, a reference value was derived for the overall initial defect of the tubes with different initial bending. Through a calculation example, a finite-element model was established in view of the overall initial defect, the initial defects of components, and the nonlinear semi-stiffness of nodes and the DAM flow was introduced for the STSC. The calculation example verifies the rationality of the reference value for the overall initial defect, making it easier to apply the DAM to actual engineering.

Keywords

Direct Analysis Method (DAM); Initial Defects; Nonlinear Analysis; Steel Tubular Scaffold with Couplers (STSC); Ultimate Bearing Capacity

Hrčak ID:

272590

URI

https://hrcak.srce.hr/272590

Publication date:

15.4.2022.

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