| Title |
An Experimental Study on the Inelastic Behavior of Reinforced Concrete Columns subjected to Axial and Lateral Loadings |
| Abstract |
The reinforced concrete columns subjected to cyclic lateral loadings tends to fail easily by shear or bending in inelastic range of deformation, mainly due to the lack of structural ductilities. Thus, the experimental verification of the structural behavior of the R/C columns subjected to lateral loadings in inelastic range has been recognized as a prerequisite thing for the enhancement of the structural efficiency and stability of the R/C buildings. This research is aimed at the experimental investigation of the effects of design variables such as reinforcement ratio, shear-span ratio, loading history, vertical load magnitude on the structural behavior of the R/C columns subjected to axial and lateral loadings in inelastic range.The dependency of the ductility and the energy dissipation capacity of the R/C columns on the reinforcement ratio has been detected from the test results. Though little difference has been found between monotonic and double repeated loading on the load carrying capacity and crack development, the specimens under continuously increased cyclic loading showed steep reduction of the load carrying capacity compared to the specimens under stepwise increased cyclic loading. Smaller shear-span ratio and vertical load have been proved to be advantageous in respect of ductility. In the tests, most specimens have been observed to fail by flexural failure mode. From the comparative investigation, the test results showed relatively close agreements with the values calculated by analytical formula. |