In this paper, the nonlinear analysis of semirigid steel base plate connections is conducted by numerical method. Under lateral and axial loads, nonlinear behavior and failure mechanism of steel base plate connections are actualized and the effect of transformation of steel base plate connections on the behavior of total structure is analysed. In the numerical anlaysis, bond-slip model is developed and adopted to consider bond-slip effect between anchor rod and concrete foundation. The efficiency and accuracy of the proposed model are examined by comparing with the experimental result. In advance, six influencing factors are chosen as follows; (1) thickness of base plate; (2) axial load; (3) yielding point of base plate; (4) yielding point of anchor; (5) embedded length of anchor; and (6) distance between tensile and compressive anchors. Parametric analysis is conducted for each influencing factor and the effect of influencing factors on the behavior of steel base plate connections is analyzed.
