Research of Mechanical Influence of Initial Imperfections on Beam String Structure

Abstract:

Initial imperfections on beam string structure (BSS) include geometric imperfections and residual stresses, which negatively influence the mechanical properties of BSS. This paper analyzed the mechanical influences of initial imperfections on BSS by FEA, pointed out that initial imperfections do not remarkably influence the properties of BSS in stage of prestressing, but geometric imperfections obviously influence the displacement out of plane in stage of use, which should be controlled to improve the safety of BSS by installing enough lateral supports at the upper chords of BSS in construction.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 282-286
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.282
• Online since: May 2012
• Authors: Yong Sheng Qi*, Sheng Hua Liu
• Keywords: Beam String Structure, Geometric Imperfections, Initial Imperfections, Residual Stress

References

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