Despite the growing applications of the performance-based design concepts for seismic design of structures, the response modification factors for structural systems proposed by the current design codes and standards do not generally consider different hazard and performance levels. Therefore, these factors are not directly applicable for performance-based design purposes. As a step to address this shortcoming, the present study aims to propose multilevel response modification factors for multistory dual moment-resisting frames equipped with eccentric braces and vertical links corresponding to different seismicity levels and performance targets. The concept of demand and capacity response modification factors is introduced, and these parameters are calculated for moment-resisting frame structures with 3-, 5-, and 7-stories before and after the addition of vertical steel shear links. It is shown that the calculated capacity response modification factors for the dual frames equipped with vertical links are generally higher than the demand response modification factors proposed by the design code for such systems under the design basis earthquake hazard level. This indicates the efficiency of the eccentric braces with the vertical links in improving the seismic reliability and performance of the moment-resisting steel frames. Based on the results of this study, the demand response modification factor for the studied dual lateral load-resisting system is calculated to be in the range of 7–10.

尽管基于性能的设计概念在结构抗震设计中的应用越来越多，但当前设计规范和标准提出的结构系统响应修正系数通常没有考虑不同的危险和性能水平。因此，这些因素并不直接适用于基于性能的设计目的。作为解决这一缺陷的一个步骤，本研究旨在提出多层双抗弯框架的多级响应修正因子，该框架配备了对应于不同地震活动水平和性能目标的偏心支撑和垂直连接。引入了需求和容量响应修正系数的概念，并针对具有3-、5-、增加竖向钢剪力链接前后的7层。结果表明，在设计基准地震危险等级下，双框架的计算容量响应修正系数通常高于设计规范为此类系统提出的需求响应修正系数。这表明具有垂直链接的偏心支撑在提高抗弯钢框架的抗震可靠性和性能方面的有效性。根据这项研究的结果，所研究的双侧向抗载系统的需求响应修正系数计算为在 7-10 的范围内。结果表明，在设计基准地震危险等级下，双框架的计算容量响应修正系数通常高于设计规范为此类系统提出的需求响应修正系数。这表明具有垂直链接的偏心支撑在提高抗弯钢框架的抗震可靠性和性能方面的有效性。根据这项研究的结果，所研究的双侧向抗载系统的需求响应修正系数计算为在 7-10 的范围内。结果表明，在设计基准地震危险等级下，双框架的计算容量响应修正系数通常高于设计规范为此类系统提出的需求响应修正系数。这表明具有垂直链接的偏心支撑在提高抗弯钢框架的抗震可靠性和性能方面的有效性。根据这项研究的结果，所研究的双侧向抗载系统的需求响应修正系数计算为在 7-10 的范围内。这表明具有垂直链接的偏心支撑在提高抗弯钢框架的抗震可靠性和性能方面的有效性。根据这项研究的结果，所研究的双侧向抗载系统的需求响应修正系数计算为在 7-10 的范围内。这表明具有垂直链接的偏心支撑在提高抗弯钢框架的抗震可靠性和性能方面的有效性。根据这项研究的结果，所研究的双侧向抗载系统的需求响应修正系数计算为在 7-10 的范围内。