为了研究露出型钢柱脚强度对低多层规则钢框架结构抗震性能的影响,首先定义了不同柱轴向力作用下的露出型钢柱脚屈服弯矩。以柱脚强度系数、层数、跨数及首层剪重比为主要研究参量,建立12个低多层规则钢框架模型。通过静力推覆分析,探讨主要研究参量对各模型各层及柱脚的受力与变形等的影响。分析结果表明:柱脚强度系数越小、首层变形集中、柱脚变形大、锚栓的塑性应变也变大。柱脚强度系数在0.4左右时,锚栓变形支配首层变形。在结构承载能力极限状态时,低层钢框架柱脚均产生轴向压力,受拉压侧柱脚屈服弯矩较锚栓屈服弯矩大;而多层钢框架的受拉侧柱脚将产生轴向拉力,受拉侧柱脚屈服弯矩小于锚栓屈服弯矩。 In order to study the influence of exposed column foot strength on the seismic behavior of low-rise multi-story steel frame structures, the bending moment of exposed steel column under different axial loads is defined. The main research parameters are the strength coefficient, the number of layers, the number of spans and the shear weight ratio of the first floor, and 12 low-rise multi-layer regular steel frame models are established. By static pushover analysis, the influence of main research parameters on the stress and deformation of each layer and column foot of each model was discussed. The analysis results show that the smaller the strength coefficient of column foot, the deformation of the first floor is concentrated, the deformation of column foot is large, and the plastic strain of anchor bolt also becomes larger. Column strength coefficient of about 0.4, the deformation of anchor deformation control the first floor. In the ultimate bearing capacity of the structure, the axial pressure of the lower steel frame columns and legs is generated, and the yield bending moment of the lower column steel legs is greater than the yield bending moment of the anchor columns; while the tensioned side column legs of the multi- Tensile force, yielding leg bending moment less than the anchor yield bending moment.