Title: Numerical study for load-carrying capacity of beam-column members having different Young's moduli in tension and compression

Authors: Zhi-Ming Ye, De-Jiang Wang, Tong Chen

Addresses: Shanghai Institute of Applied Mathematics and Mechanics, Department of Civil Engineering, Shanghai University, 99 Shangda Road, Shanghai 200444, P.R. China. ' Department of Civil Engineering, Shanghai University, 149 Yanchang Road, Shanghai 200072, P.R. China. ' Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, 149 Yanchang Road, Shanghai 200072, P.R. China

Abstract: Different tension-compression elastic moduli are introduced in both small- and large-displacement finite element formulations. Corresponding numerical methods and three-dimensional finite element iterative programs for geometric and material non-linearities are developed. A numerical example is presented for the load-carrying capacity of beam-column structures of different tension and compression modulus. Factors affecting the load-carrying capacity are also discussed, which include constraint conditions, couple moments, ratios of tensile-to-compressive modulus. The results show that the load-carrying capacity of the beam-column structure of different tension-compression moduli is significantly different from that of the beam-column structure of equal tension-compression moduli.

Keywords: different modulus theory; beam column members; ultimate load-carrying capacity; finite element method; FEM; nonlinearity; tension; compression; elastic moduli.

DOI: 10.1504/IJMIC.2009.027212

International Journal of Modelling, Identification and Control, 2009 Vol.7 No.3, pp.255 - 262

Published online: 17 Jul 2009 *

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