Simplified analysis and design methods for structural members of sofa frames considering fatigue effects.

摘要

The design of upholstered sofa frames to meet the General Service Administration (GSA) performance test regimen requires that analytical-method and design loads be available. A simplified analysis method using beam models to analyze and calculate bending moments of critical structural members in a three-dimensional sofa frame was explored. The GSA performance test regimen load schedules were applied to the frame, and transferred to individual structural members in terms of stepped cyclic load schedules. Maximum bending moment values of each structural member were calculated with beam models for each load level of stepped cyclic load schedules that the members were subjected to. Maximum moment values can be used for member design such as determination of member sizes and stresses. Stepped cyclic load schedules can be used for fatigue performance evaluation of full-size frame structural members. A procedure for estimating frame member sizes and deriving design loads for these members was explored. Design loads in terms of equivalent static bending moments while considering fatigue effects were derived for critical structural members of the sofa frame model.