Structural design of steel fibre reinforced concrete in-filled steel circular columns

다국어 초록 (Multilingual Abstract)

This paper presents the behavior and design of axially loaded normal and steel fiber reinforced concrete in-filled steel tube (SFRCFT) columns, to examine the contribution of steel fibers on the compressive strength of the composite columns. Non-linear finite element analysis model (FEA) using ANSYS software has been developed and used in the analysis. The confinement effect provided by the steel tube is considered in the analysis. Comparisons of the analytical model results, along with other available experimental outputs from literature have been done to verify the structural model. The compressive strength and stiffness of SFRC composite columns were discussed, and the interpretation of the FEA model results has indicated that, the use of SFRC as infill material has a considerable effect on the strength and stiffness of the composite column. The analytical model results were compared with the existing design methods of composite columns – (EC4, AISC/LRFD and the Egyptian code of Practice for Steel Construction, ECPSC/LRFD). The comparison indicated that, the results of the FEA model were evaluated to an acceptable limit of accuracy. The code design equations were modified to introduce the steel fiber effect and compared with the results of the FEA model for verification.

참고문헌 (Reference)

1 Kitad, "Ultimate strength and ductility of concrete filled steel bridge piers in Japan" 20 (20): 347-354, 1998

2 Mander, J. B., "Theoretical stress–strain model for confined concrete" 114 (114): 1804-1826, 1988

3 Nataraja, M. C., "Stress-strain curves for steel-fiber reinforced concrete under compression" 21 (21): 383-390, 1999

4 Yiyan Lu, "Research on behaviors of steel fiber reinforced concrete filled steel tube columns under axial load" 167 : 596-599, 2011

5 Hu, H. T., "Nonlinear analysis of axially loaded concrete-filled tube columns with confinement effect" 129 (129): 1322-1329, 2003

6 AISC, "Load and resistance factor design specification for structural Steel buildings, In AISC specification" American Institute of Steel Construction 2005

7 Bentur, A., "Fiber reinforced cementations’ composites" Elsevier 1990

8 Yang, Y. F., "Experiments on rectangular concrete-filled steel tubes loaded axially on a partially stressed cross-sectional area" 65 (65): 1616-1630, 2009

9 Gajalakshim P., "Experimental Investigation on behavior of SFRC Infilled steel circular columns under axial compression" 25 : 257-264, 2012

10 "Egyptian code of practice for steel construction, Load and Resistance Factor Design ECPSC/LRFD"

11 Saenz, L. P., "Discussion of equation for the stress–strain curve of concrete by Desayi, P. and Krishnan, S" 61 : 1229-1235, 1964

12 "Design of composite steel and concrete structures, In Part 1.1, General rules and rules for buildings (with UK national application document)" British Standards Institution 2004

13 Hu, H. T., "Constitutive modeling of concrete by using nonassociated plasticity" 1 (1): 199-216, 1989

14 Elchalakanim, M., "Concrete filled cold-formed circular steel tubes subjected to variable amplitude cyclic bending" 30 (30): 287-299, 2008

15 Jaime H. R., "Computer simulation of failure process of a fiber-reinforced concrete composite with randomly distributed fiber clusters" 28 (28): 1613-1624, 2009

16 ACI, "Building code requirements for structural concrete and commentary, ACI 318-99" American Concrete Institute 1999

17 Han, L. H., "Behavior of concrete-filled steel tubular stub columns subjected to axially local compression" 64 (64): 377-387, 2008

18 Yang, Y. F., "Behavior of concrete filled steel tubular(CFST)stub column under eccentric partial compression" 49 (49): 379-395, 2011

19 Sakino, K., "Behavior of centrally loaded concrete filled steel tube short columns" 130 (130): 180-188, 2004

20 ANSYS, Inc., "ANSYS verification manual, release 12.0"

21 Richart, F. E., "A study of the failure of concrete under combined compressive stresses" University of Illinois Engineering Experimental Station 1928