STRUCTURAL PERFORMANCE AND DESIGN METHOD OF NEW MORTISE–TENON FULL STEEL-TUBE SCAFFOLD

A mortise-tenon steel-tube scaffold, a new steel-tube scaffold, was presented based on ancient mortise-tenon joint in wood structure.Because of better joint mechanics and higher bearing capacity than coupler-type steel-tube scaffold, this new scaffold possesses good market potential.Based on an analysis of the bearing mechanism, a finite element numerical analysis model for the mortise-tenon steel-tube scaffold was established in this study, which was validated as reasonable and accurate by experiment data.Influencing laws of storey height, vertical member interval, X-bracing layout, overall structure height, height of bottom horizontal tube, and height of upper cantilever bar on the mortise-tenon steel-tube scaffold were determined through parameter analysis.A simplified calculation formula of ultimate bearing capacity was established, which verified by FEM results and test data.Research results provide important references for future in-depth studies and engineering applications of the mortise-tenon steel-tube scaffold.