| Title |
Compressive Strength of Hollow-Precast Concrete Composite Column under Uniaxial and Eccentric Axial Load |
| Authors |
Lee, Seung-Jun ; Seo, Soo-Yeon ; Kim, Kang-Su |
| DOI |
http://dx.doi.org/10.5659/JAIK_SC.2015.31.2.3 |
| Keywords |
Hollow-precast concrete composite column ; concentric and eccentric test ; material strength ; hollow size ; code formula |
| Abstract |
In this paper, in order to evaluate the applicability of KBC formula in calculating the strength of hollow-precast concrete (HPC) column for design purpose, a compressive capacity was evaluated through the concentric and eccentric test for the columns with various material strength and hollow size, respectively. Based on the test result, the suitability of code formulae was checked and the lateral confining effect of HPC composite column was also evaluated by using Mander's stress-strain relationship. Also, nonlinear sectional analysis process was performed. As a result, it was found that the strength of the HPC composite column could be suitably predicted by using KBC code formulae for design purpose. In the calculation of the compressive strength of the column by using Mander model considering the lateral confining effect of hoop, the confining effect of it in HPC was less than that in reinforced concrete column and changed corresponding to the concrete strength ratio between PC and CIP (Cast-In-Place). The effect decreases when the concrete strength of CIP is not less than that of PC. The flexural-compression capacity of HPC composite column can be suitably evaluated by using the effective strength of concrete. |