Investigation of the Neutral Axis in the Positive Moment Region of Composite Beams

Authors: Su-Young Jeong, Won-Kee Hong, Seon-Chee Park, Gyun-Taek Lim, Eric Kim

Abstract:

Researchers investigate arious strategies to develop composite beams and maximize the structural advantages. This study attempted to conduct experiments and analysis of changes in the neutral axis of positive moments of a Green Beam. Strain compatibility analysis was used, and its efficiency was demonstrated by comparing experimental and analytical values. In the comparison of neutral axis, the difference between experimental and analytical values was found to range from 8.8~26.2%. It was determined that strain compatibility analysis can be useful for predicting the behaviors of composite beams, with the ability to predict the behavior of not only the elastic location of the composite member, but also of the plastic location

Keywords: Composite beam, Strain compatibility, Neutral axis, Green Beam

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1061926

References:

[1] W. K. Hong, S. C. Park, J. M. Kim, S. G. Lee, S. I. Kim, K. J. Yoon, H. C. Lee,"Composite beam composed of steel and pre-cast concrete (modularized hybrid system, MHS) Part I: Experimental investigation," Struct. Des. Tall. Spec. Build., vol. 19, no. 3, pp. 275-289, Apr. 2010.
[2] W. K. Hong,J. M. Kim, S. C. Park, S. G. Lee, S. I. Kim, K. J. Yoon, H. C. Kim, J. T. Kim, "A new apartment construction technology with effective CO2 emission reduction capabilities,"Energy - Int. J.,vol. 35, no. 6, pp. 2639-2646, Apr. 2010.
[3] W. K. Hong, S. I. Kim, S. C. Park, J. M. Kim, S. G. Lee, K. J. Yoon, S. K. Kim,"Composite beam composed of steel and pre-cast concrete (modularized hybrid system, MHS) Part IV: Application for multi-residential housing,"Struct.Des. Tall. Spec. Build.,vol. 19, no. 7, pp. 707-727, Nov. 2010.
[4] W. K. Hong, J. M. Kim, S. C. Park, S. I. Kim, S. G. Lee, H. C. Lee, K. J. Yoon,"Composite beam composed of steel and pre-cast concrete (modularized hybrid system, MHS) Part II: Analytical investigation,"Struct. Des. Tall. Spec. Build.,vol. 18, no. 8, pp. 891-905, Nov. 2009.
[5] American Institute of Steel Construction Inc. and the Structural Steel Educational Council: Seismic Design Manual: AISC: 2006
[6] R. Park,T. Paulay,Reinforced Concrete Structures.New York: JOHN WILEY&SONS, 1975.