Numerical investigation of the cyclic response of CHS braces

T. Sheehan, Tak Ming Chan, J. H. Xing, L. Gardner

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The behaviour of seismic-resistant buildings relies heavily upon the inclusion of energy dissipating elements. For concentrically-braced frames, the function of energy dissipation is accomplished by diagonal bracing members, whose performance depends upon both cross-sectional properties and global slenderness. Rectangular hollow sections are traditionally preferred in such applications. However these sections are susceptible to local buckling and, particularly in the case of cold formed tubes, have high residual stresses and reduced corner ductility. Hence as an alternative, this paper focuses on the hysteresis response of hollow circular tubes under cyclic axial loading. The uniformity of the circular cross-section may provide improved performance under cyclic loading over rectangular sections. In this paper, finite element analysis and a damage assessment method are first validated against experimental data on both hot-rolled and cold formed hollow CHS members. A series of parametric investigations is then carried out to access the influence of the local slenderness, global slenderness and steel material type on the hysteresis behaviour. Predictive expressions for displacement ductility and energy dissipation, incorporating both local and global slenderness, are proposed.
Original languageEnglish
Title of host publicationResearch and Applications in Structural Engineering, Mechanics and Computation - Proceedings of the 5th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2013
Pages253-258
Number of pages6
Publication statusPublished - 9 Dec 2013
Externally publishedYes
Event5th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2013 - Cape Town, South Africa
Duration: 2 Sep 20134 Sep 2013

Conference

Conference5th International Conference on Structural Engineering, Mechanics and Computation, SEMC 2013
CountrySouth Africa
CityCape Town
Period2/09/134/09/13

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

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