Abstract
In order to clarify the mechanism of stress transfer developed through the connection in steel column bases, this paper reports an experimental study on the relation between load and strain, and the stress distribution characteristics in column base connections based on the experimental data which was already presented in the previous paper (Part 2). The main results derived from the analysis on these experiments are as following : (1) From the strain distribution characteristics of the mortar footing, it is confirmed that the reaction distribution and available area compressed on the surface of mortar footing are influenced predominantly by the change of thickness of the base plate. (2) In the bending stress for the cantilever part of base plate, the calculated values of the analysis and institute are in accordances approximately with the experimental results in the tension side. In the compression side, the calculated values of the analysis and institute are in good accordances with the experimental results in the case of a thick base plate, but in case that the base plate come to be thin, the calculated values of the institute are overestimated in comparison with the experimental results. (3) On the tensile reaction produced to the anchor bolts, the correspondence of the experimental results to the analytical results is good nearly, but in case that the base plate come to be extremely thin and the eccentricity come to be large, the calculated values of the institute are underestimated in comparison with the experimental results.
