Temperature-dependent nonlinear analysis of shallow shells: A theoretical approach

P. Khazaeinejad, Asif Sohail Usmani

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

© 2016 Elsevier Ltd.The paper presents a theoretical formulation for the computation of temperature-dependent nonlinear response of shallow shells with single and double curvatures subjected to transverse mechanical loads while being exposed to through-depth non-uniform heating regimes such as those resulting from a fire. The material nonlinearity arises from taking into consideration the degradation of the material elastic behaviour at elevated temperatures under quasi-static conditions. Two types of boundary conditions are considered, both of which constrain the transverse deflections and allow the rotations about the edge axis to be free. One of the boundary conditions permits lateral translation (laterally unrestrained) and the other one does not (laterally restrained). A number of examples are solved for shallow shells under different types of loading conditions including: an exponential "short hot" fire leading to a high temperature over a relatively short duration; and an exponential "long cool" fire of lower temperature over a longer duration. The limits of the shallow shell equations are investigated through comparison studies. Results show that while current numerical approaches for analysis of laterally restrained shallow shells are often computationally intensive, the proposed approach offers an adequate level of accuracy with a rapid convergence rate for such structures.
Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalComposite Structures
Volume141
DOIs
Publication statusPublished - 1 May 2016
Externally publishedYes

Keywords

  • Composite shallow shell
  • Geometric nonlinearity
  • Material nonlinearity
  • Non-uniform heating
  • Structures in fire
  • Temperature-dependent material properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

Cite this