Development of Performance Based Structural Response Modification Factors (R-Factors)

结构响应修正因子（R-Factor）将结构在显著屈服水平上的实际地震反应与由强震记录计算出的反应谱所表示的弹性反应联系起来。因此，r因子提供了一种基本机制，通过该机制强震数据可以应用于许多建筑类型的抗震设计。本研究项目的目标是评估一般的r因子概念，通过对强震记录和建筑反应数据的分析来评估当前可用的r因子值，并制定在常用结构系统的抗震设计中分配和利用r因子的指导方针。r因子方法的改进和完善以及特定建筑类型r因子的发展将极大地有利于工程界和全国建筑业。

Structural response modification factors (R-Factor) relate the actual earthquake response of structures at significant yield level to the elastic response as represented by the response spectrum computed from strong-motion records. As a result, R-Factors provide a basic mechanism through which strong-motion data can be applied in the seismic design of many building types. The objectives of this research project are to assess the R-Factor concept in general, to evaluate currently available R-Factor values through the analyses of strong-motion records and building response data, and to develop guidelines for assigning and utilizing R-Factors in the seismic design of commonly used structural systems. The improvement and refinement of the R-Factor approach and the development of R-Factors for specific building types will significantly benefit the engineering community and the construction industry nationwide.