1 西安建筑科技大学土木学院 710055；2 中国建筑西北设计研究院 西安 710003； 3 苏州科技大学土木工程系 215011

［提要］阐述了结构影响系数的定义及计算方法，采用典型的地震动记录对按照我国规范要求设计的一人字形中心支撑钢框架结构进行增量动力分析并得到其结构影响系数。结果表明，结构影响系数受分析方法、极限状态及破坏准则、有限元模型等影响较大，需要在这些方面作大量的研究工作。

［关键词］结构影响系数；中心支撑钢框架；增量动力分析；极限状态；破坏准则

Study on Response Modification Factors of Inverted V CBSF/Yang Junfen１, Zhang Fan2, Gu Qiang3(1 School of Civil Engineering, Xi"an University of Architecture & Technology, Xi"an 710055, China；2 China Northwest Building Design & Research Institute, Xi"an 710003, China；3 Department of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China )

Abstract:The definition and computation method of response modification factors (behavior factors) is explained, and an inverted V concentrically braced steel frame (CBSF) is designed according to Chinese design codes.The incremental dynamic analysis (IDA)is used to get the response modification factors. The results indicate that the analysis method of response modification factors, limit state, failure criterion and finite element model have much influence on the response modification factors of structures, and much work is needed in this research field.

Keywords:response modification factors; CBSF; IDA; limit state; failure criterion