A 6DOF super element for nonlinear analysis of composite frames with partial interaction and semi-rigid connections

Le Luong Bao Nghi, Bui Cong Thanh


This paper presents a displacement-based finite element formulation for nonlinear analysis of steel - concrete composite planar frames subjected to combined action of gravity and lateral loads. A 6DOF super element is proposed for modeling composite beam, allowing for partial interaction between the steel beam and the concrete slab, semi-rigid nature of beam to column composite connection and material nonlinearity. The load control method and the displacement control method are utilized for tracing the structural equilibrium paths, and the direct method is utilized for solving the nonlinear problem. Numerical examples, concerning a two-span continuous composite beam, a portal composite frame and a six-storey composite frame, are performed. The results are compared with experience data or theoretical results from other studies and are discussed for influences of the factors mentioned above on behaviour of composite beams and composite frames.


super finite element; composite constructions; partial interaction; semi-rigid composite connections; nonlinear analysis

Full Text:


DOI: https://doi.org/10.15625/0866-7136/33/1/35 Display counter: Abstract : 242 views. PDF : 89 views.


  • There are currently no refbacks.

Copyright (c) 2011 Vietnam Academy of Science and Technology


Editorial Office of Vietnam Journal of Mechanics

3rd Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam
Tel: (+84) 24 3791 7103
Email: vjmech@vjs.ac.vn