This paper presents a parametric study conducted on five Steel Moment Frames (SMFs) varying in height (2-, 4-, 8-, 12-, and 20- story) to assess the interactive effect of the column base hysteretic behavior, continuous gravity columns and partially restrained gravity beam-column connections in their seismic performance. The frame response is examined through sophisticated Nonlinear Time History (NTH) and Nonlinear Static Pushover (NSP) analyses conducted as per FEMAp695 methodology. For each SMF, a range of base connection strengths (and their corresponding rotational stiffnesses) accompanied by different levels of gravity columns rigidity and gravity connection strengths are assigned, resulting in a total of 80 model simulations. Two collapse/failure limit states are formulated for the assessment 1) sidesway collapse defined as per FEMAp695; and 2) column-base connection failure, defined as base rotations exceeding a 0.05 rad threshold. Results from the simulations indicate that the gravity framing system profoundly affects the behavior of the SMFs analyzed by reducing their probability of collapse. In this manner, the seismic demands for the design of column-base connections can be reduced safely, incorporating their high deformation capacity as part of the energy dissipative mechanisms. Potential design implications are discussed, and limitations, as well as lines for future research, are outlined.

本文介绍了对五个高度不同的钢制矩型框架（SMF）（2-，4-，8、12和20层）进行的参数研究，以评估柱基滞后行为，连续重力的交互作用。柱和部分受约束的重力梁柱连接的抗震性能。通过根据FEMAp695方法进行的复杂的非线性时程（NTH）和非线性静态推覆（NSP）分析来检查帧响应。对于每个SMF，分配了一系列基本连接强度（及其相应的旋转刚度）以及不同级别的重力柱刚度和重力连接强度，从而进行了总共80个模型仿真。为评估制定了两个崩溃/失效极限状态：1）根据FEMAp695定义的侧向崩溃；2）列-基连接失败，定义为基旋转超过0.05 rad阈值。仿真结果表明，重力框架系统通过降低SMF坍塌的可能性，对SMF的行为产生了深远的影响。以这种方式，可以安全地降低对柱基连接设计的地震要求，并将其高变形能力作为能量耗散机制的一部分。讨论了潜在的设计含义，并概述了局限性以及未来研究的思路。通过将其高变形能力作为耗能机制的一部分，可以安全地降低对柱基连接设计的抗震要求。讨论了潜在的设计含义，并概述了局限性和未来研究的思路。通过将其高变形能力作为耗能机制的一部分，可以安全地降低对柱基连接设计的抗震要求。讨论了潜在的设计含义，并概述了局限性和未来研究的思路。