袁建力
    （扬州大学 扬州 225009）

[提要]  提出了受损框架结构抗震能力的理论分析和鉴定方法，采用损伤指标D测定构件的残余耗能能力，可较好地描述结构在前期地震中的损伤状况和继续经受新一轮地震后的损伤总积累。
[关键词]  前期地震 预期地震 钢筋混凝土框架 能量耗散 损伤积累  抗震鉴定

This paper presents a theoretical analysis and appraisal method for earthquake-resistant capability of a damaged concrete frame structure. ln the automatic method, a damage index D is served as a measure of a member's residual energy dissipation capacity, which is capable of predicting reasonably well the damage accumulation of the structure to an expected earthquake B, after it has been damaged by a previous earthquake A. An updated computer program SARCF~Illwas written to carry out the analysis task, which consists of four main components:the hysteretic model for nonlinear response of RC frame members; the damage accumulation model for a plastic hinge section; the simulation of the earthquake ground motion as a random process; the nonlinear dynamic analysis program for the frame analysis. An eight-story three-bay office building analyzed with SARCF-111 demonstrates that the analysis method and the program are effective, and the results can be served for experimential earthquake-resistant appraisal means.
Keywords: previous earthquake; expected earthquake; reinforced concrete frame; energy dissipation; damaged accumulation; earthquake-resistant appraisal