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针对低层钢框架损伤分布机理不明确,以钢框架的强柱系数、柱脚形式及首层剪重比为主要研究参量,建立16个典型低层钢框架模型;通过强震作用下的弹塑性时程分析,基于能量平衡原理研究低层钢框架楼层以及构件的损伤分布机理.研究结果表明:罕遇地震输入能量的80％以上靠钢框架构件塑性变形来吸收;低层钢框架首层变形集中,为防止首层破坏,柱脚刚接时强柱系数要求1.7以上,柱脚铰接时,建议强柱系数大于2.当强柱系数大于3时,各层层间位移分布基本均匀,然而刚接梁地震需求性能增大,在设计中对梁高的控制及梁柱节点连接的工艺要求较高.“,”Aiming to the fact that it was still ambiguous for the damage distribution mechanism of lowrise steel frame structure,16 typical low-rise steel frame models were established based on the main research parameters including strong-column factor,column base form and shear-weight ratio of the first floor.Through elastic-plastic time-history analysis under earthquake,the damage distribution mechanism of the low-rise steel frame structure and component was studied by energy balance law.The results show that more than 80％ input energy of severe earthquake is absorbed by the component plastic deformation of steel frame structure;The first floor deformation is centralized for low-rise steel frame,the strong-column factor is not less than 1.7 in order to prevent the first floor damage;When the column base is hinge joint,the strongcolumn factor is advised greater than 2.When the strong-column factor is greater than 3,the distribution of inter-story displacement for every floor is nearly balance,however,the seismic performance requirements of rigid-joint column is increased,the technological requirements of controlling the height of the beam and joining the beam-column is also increased.