Nonlinear seismic analysis of space structures with partially restrained connections

Liwei Gao, Achintya Haldar

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

An efficient and robust finite-element-based method for estimating nonlinear responses of complex three-dimensional structures with partially restrained connections under dynamic and seismic loading is presented. The method is developed using the assumed stress-based finite-element method in which the tangent stiffness can be expressed in explicit form and fewer elements are needed to model a structure. Geometric and material nonlinearities and the nonlinear behavior of partially restrained connections are considered. For the dynamic and seismic analyses, three major sources of damping are considered. They are viscous damping, hysteretic damping in the PR connections, and the hysteretic damping at the plastic hinges, if plastic hinges are developed in the structure. It is observed from the examples considered in this study that proper consideration of PR connections is essential in modeling the realistic dynamic and seismic behavior of structures. Numerical results show that the presence of partially restrained connections may not cause failure of a structure due to insufficient strength but may make serviceability constraints, e.g., the lateral deformation, more critical.

Original languageEnglish (US)
Pages (from-to)27-37
Number of pages11
JournalMicrocomputers in Civil Engineering
Volume10
Issue number1
StatePublished - Jan 1995

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damping
Damping
Hinges
plastic
Plastics
nonlinearity
finite element method
stiffness
Stiffness
Finite element method
analysis
modeling
method

ASJC Scopus subject areas

  • Engineering(all)
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Nonlinear seismic analysis of space structures with partially restrained connections. / Gao, Liwei; Haldar, Achintya.

In: Microcomputers in Civil Engineering, Vol. 10, No. 1, 01.1995, p. 27-37.

Research output: Contribution to journalArticle

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