Direct displacement-based design (DDBD) method is one of the most effective methods for performance-base design of structures that has been also employed to design structures controlled by fluid viscous damper (FVD). In previous studies, a modified DDBD has been developed to apply the higher mode effects as well as difference between spectral velocity and pseudo-spectral velocity on the design velocity of FVD. To this end, two constants were defined to correct the damping coefficient of FVD that these correction constants had been determined in a non-classical and iterative manner. In this study, a new classical method is proposed for determining these constant such that no iteration is required in DDBD. In order to be able to introduce this design approach as a reliable framework, its performance is validated under different sets of earthquake records and this design approach is also developed for structures controlled by nonlinear FVD. Steel moment-resisting frames with different numbers of stories have been designed using this method. For comparison, structures have been also designed based on DDBD proposed in previous researches. The results show that DDBD approach improved in this study is capable to achieve the design performance level under different sets of earthquake records and this design approach has more effective performance than previous design methods. Performance of steel moment-resisting frames equipped with nonlinear FVD also shows excellent performance of this design approach in achievement of desirable performance level. Therefore, DDBD approach proposed in this study can be introduced as a new classical and reliable framework because of its simplicity and excellent performance under different sets of earthquakes.

基于直接位移的设计（DDBD）方法是基于性能的结构设计的最有效方法之一，该方法也已用于设计由流体粘性阻尼器（FVD）控制的结构。在以前的研究中，已经开发出一种改进的DDBD，以将较高的模式效应以及谱速度和伪谱速度之间的差异应用于FVD的设计速度。为此，定义了两个常数以校正FVD的阻尼系数，因为这些校正常数已以非经典和迭代的方式确定。在这项研究中，提出了一种新的经典方法来确定这些常数，以便在DDBD中不需要迭代。为了能够将这种设计方法作为可靠的框架进行介绍，其性能在不同的地震记录集下得到了验证，并且这种设计方法还针对非线性FVD控制的结构而开发。使用此方法设计了具有不同层数的钢制抗弯框架。为了进行比较，还基于先前研究中提出的DDBD设计了结构。结果表明，在本研究中改进的DDBD方法能够在不同地震记录集下达到设计性能水平，并且该设计方法比以前的设计方法具有更有效的性能。配备非线性FVD的钢制矩型框架的性能也显示了该设计方法的出色性能，从而达到了理想的性能水平。所以，