Session Start Date

11-3-2010

Abstract

This paper describes an experimental study of a rolling sheet door under uniform positive and negative pressure, i.e. wind pushing the door into the building and wind suction pulling the door out of the building. Rolling sheet vehicular access doors are a commonly provided feature in metal building systems. The edges of the door slide freely during regular usage in tracks connected to cold-formed steel jambs. During an extreme wind event, the door engages the jambs with wind locks distributed along both vertical edges of the door to prevent excessive out-of-plane deformation. The goal of the study was to measure the forces in the wind locks and evaluate the performance of the door curtain and cold- formed steel door jambs. Axial and bending stresses in the wind locks, door curtain out-of-plane deflections, and jamb deflections were simultaneously measured using strain gauges and position transducers. The relationship between curtain deflection and wind lock forces was observed to be nonlinear and dependent upon the stiffness of the cold-formed steel jambs. The experimental observations are being used to develop and validate engineering expressions for predicting wind lock and door jamb design forces in rolling sheet vehicular access door systems.

Department(s)

Civil, Architectural and Environmental Engineering

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Meeting Name

20th International Specialty Conference on Cold-Formed Steel Structures

Publisher

Missouri University of Science and Technology

Publication Date

11-3-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Nov 3rd, 12:00 AM

Experimental Evaluation of a Vehicular Access Door Subjected to Hurricane Force Wind Pressures

This paper describes an experimental study of a rolling sheet door under uniform positive and negative pressure, i.e. wind pushing the door into the building and wind suction pulling the door out of the building. Rolling sheet vehicular access doors are a commonly provided feature in metal building systems. The edges of the door slide freely during regular usage in tracks connected to cold-formed steel jambs. During an extreme wind event, the door engages the jambs with wind locks distributed along both vertical edges of the door to prevent excessive out-of-plane deformation. The goal of the study was to measure the forces in the wind locks and evaluate the performance of the door curtain and cold- formed steel door jambs. Axial and bending stresses in the wind locks, door curtain out-of-plane deflections, and jamb deflections were simultaneously measured using strain gauges and position transducers. The relationship between curtain deflection and wind lock forces was observed to be nonlinear and dependent upon the stiffness of the cold-formed steel jambs. The experimental observations are being used to develop and validate engineering expressions for predicting wind lock and door jamb design forces in rolling sheet vehicular access door systems.