? 2022 Elsevier LtdExposed column bases are widely used in low-to-medium rise steel structures. As they can transfer all the loads from the superstructure to the sub-system, exposed column bases are in the most severe state of stress. Further, they show various failure modes because of the complex stress transfer mechanism. One of the failure modes stated in the Japanese design recommendations are the yielding of anchor rods. To ensure the yielding of anchor rods, the bearing failure of foundation concrete must be prevented. However, studies on the bearing stress of exposed column bases are limited. In the present study, the existing calculation methods for the bearing stress of exposed column bases are summarized. A database of previous experimental studies on exposed column bases was also established to analyze the calculation methods. To normalize the experimental results in the database, an experiment was conducted on full-scale, exposed column bases, and a method was proposed to obtain the full plastic moment for further analysis. With the proposed method, the accuracy and applicability of the calculation methods were verified. Furthermore, considering the design philosophy in Japan, a more conservative method to calculate bearing stress was proposed.
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