Analysis of stabilizing process for stress-erection of Strarch frame

•We study stress-erection of Strarch frame.•Flexible top chord experienced large rigid body rotation.•Strarch frame is unstable structure before erection completed.•Excessive strain may do little effect to the strength of flexible top chord.•Strarch system is close to a plane truss rather than beam–...

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Bibliographic Details
Published in:Engineering structures 2014-02, Vol.59, p.49-67
Main Authors: Lee, Kyoungsoo, Huque, Ziaul, Han, SangEul
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Computation methods. Tables. Charts
Damping
Domes
Dynamic relaxation method
Dynamical systems
Dynamics
Exact sciences and technology
Frames
Mathematical models
Plastic hinge
Post-tensioning
Stability
Stabilizing process analysis
Strarch system
Stress-erection process
Stresses. Safety
Structural analysis. Stresses
Unstable structure
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Summary:•We study stress-erection of Strarch frame.•Flexible top chord experienced large rigid body rotation.•Strarch frame is unstable structure before erection completed.•Excessive strain may do little effect to the strength of flexible top chord.•Strarch system is close to a plane truss rather than beam–column. The stress-erection process is a unique feature of the Strarch system; this study examined the stabilizing process for this method. In the stress-erection process, post-tensioning is performed by installing a jacking tendon force inside the bottom chord member to determine the structural shape and initial stability. Before erection is completed, the structural system of a Strarch frame is unstable. The prestress installation process of the Strarch system is similar to that of a cable dome, which is also an unstable structure. Therefore, the dynamic relaxation method with kinetic damping, which is a stabilizing process for unstable structures, can be used for the Strarch system. The stabilizing process was verified by comparing the results of simple calculations and an experimental study using an actual-scale Strarch frame unit. The numerical applicability and accuracy of the method was further validated by analysis of the stabilizing process for the stress-erection of different Strarch models.
ISSN:0141-0296
1873-7323
DOI:10.1016/j.engstruct.2013.09.043