In this article, effects of ductility level and connection type on seismic responses of fixed-base and base-isolated buildings with steel moment-resisting frames are evaluated using nonlinear time history analyses. In a comparative assessment of responses, a set of twenty-four models is seismically designed, including 3- and 9-story base-isolated and conventional buildings, with ordinary (OMF), intermediate (IMF), and special (SMF) levels of ductility. Each model presents two types of connections, including WUF-W and RBS. Three-dimensional models for all buildings are created in OpenSees software, and seismic responses are assessed for two earthquake scenarios. Seismic responses of buildings, such as peak floor acceleration, peak floor shear force, peak story drift, and residual and maximum displacement of isolators are calculated and analyzed. The results indicate that the ductility levels and connection types significantly affect seismic responses of base-isolated and fixed-based buildings. The RBS connection reduces the peak drift demands compared to the WUF-W connection, and the difference increases with the increment of building's height. The SMF superstructure decreases the peak floor acceleration and peak shear force compared to the IMF and OMF ones. Moreover, the peak floor drift ratio of the OMF superstructures is larger than the IMF and SMF in base-isolated buildings. The maximum difference is computed by about 80% between the OMF and SMF superstructures.

在本文中，使用非线性时程分析评估了延性水平和连接类型对带有钢抗弯框架的固定基础和基础隔离建筑物的地震响应的影响。在对响应的比较评估中，采用抗震设计了一套二十四个模型，包括3层和9层的基础隔离建筑和常规建筑，其普通（OMF），中级（IMF）和特殊（SMF）级别为延展性。每种模型都呈现两种类型的连接，包括WUF-W和RBS。在OpenSees软件中创建了所有建筑物的三维模型，并针对两种地震场景评估了地震响应。计算并分析了建筑物的地震响应，例如峰底加速度，峰底剪切力，峰层漂移以及隔离器的残余位移和最大位移。结果表明，延性水平和连接类型显着影响基础隔震和固定基础建筑物的地震响应。与WUF-W连接相比，RBS连接减少了峰值漂移需求，并且差值随建筑物高度的增加而增加。与IMF和OMF相比，SMF上部结构降低了峰值底板加速度和峰值剪切力。此外，在基础隔离的建筑物中，OMF上层建筑的峰值地面漂移率大于IMF和SMF。OMF和SMF上部结构之间的最大差异约为80％。与WUF-W连接相比，RBS连接减少了峰值漂移需求，并且差值随建筑物高度的增加而增加。与IMF和OMF相比，SMF上部结构降低了峰值底板加速度和峰值剪切力。此外，在基础隔离的建筑物中，OMF上层建筑的峰值地面漂移率大于IMF和SMF。OMF和SMF上部结构之间的最大差异约为80％。与WUF-W连接相比，RBS连接减少了峰值漂移需求，并且差值随建筑物高度的增加而增加。与IMF和OMF相比，SMF上部结构降低了峰值底板加速度和峰值剪切力。此外，在基础隔离的建筑物中，OMF上层建筑的峰值地面漂移率大于IMF和SMF。OMF和SMF上部结构之间的最大差异约为80％。