Force Transfer Mechanism in Embedded Steel Column Bases


Article Preview

This paper presents the results of an investigation on the force transfer mechanism in an embedded column base of a composite structure. In the experimental program, eighteen push-out specimens were tested. The factors influencing the mechanism of force transfer were the amount of confining reinforcement, compressive strength of concrete, and diameter of stud connectors. The results of experiment indicated that force transfer could be characterized into two stages, and the factors governing each stage were identified. The first stage was governed by the bond strength between the steel column base and the concrete. The second stage begun after chemical debonding and was governed by the shear strength of stud connectors as well as the frictional strength between the steel and the concrete. Based on the experimental results, the equations to estimate the bond strength, the friction strength, and the shear strength of stud connectors were proposed. The load carrying capacity of an embedded steel column base could be predicted by taking the sum of the shear strength of stud connectors and the friction strength. The predicted load carrying capacity was found to agree well with the experimental results over various range of concrete stress.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim




Y. H. Kim et al., "Force Transfer Mechanism in Embedded Steel Column Bases", Key Engineering Materials, Vols. 326-328, pp. 1805-1810, 2006

Online since:

December 2006




[1] C.W. Roeder, R. Chmielowski, and C.B. Brown: Journal of Structural Engineering, Vol. 125 (1999), p.142.

[2] AIJ: AIJ Standard for Structural Calculation of Steel Reinforced Concrete Structures (Architectural Institute of Japan, Japan 1991).

[3] EUROCODE No. 4: Design of Composite Steel and Concrete Structures. Part 1: General Rules for Buildings (Commission of European Communities, Luxembourg 1990).

[4] J.G. Ollgaord, R. G Slutter, and J.W. Fisher: AISC Engineering Journal, Vol. 8, No. 2 (1971), p.55.

[5] K.S. Kim and S.S. Kim: Journal of Structure and Construction Engineering (in Japan), Vol. 389 (1988), p.79.

[6] H.Y. Cheong, S.S. Kim, and K.S. Kim: Journal of Architectural Institute of Korea (in Korea), Vol. 16 (2000), p.45.