This study presents a novel friction energy dissipation (FED) joint designed to suspend precast reinforced concrete cladding on beams within steel frame structural systems. An experimental investigation was conducted to examine the influence of friction sheet materials on the mechanical properties, energy dissipation performance, and seismic reduction effect of these new FED joints on the main structure. The friction sheets were composed of three types of metal materials and two polymer composite materials. Subsequently, the FED joints and precast concrete cladding were considered as a FED system. Based on experimental research results, simplified finite element analysis models of the FED system using OpenSEES were established. The influence of the FED system on the initial stiffness, bearing capacity, and energy dissipation performance of the steel frame structure system was investigated through finite element comparative analysis, employing a single-layer single span steel frame. The research indicates that the new FED joints exhibit reliable connection performance, preventing premature cracking and failure of concrete cladding through the relative sliding of FED joints. The material type of the friction sheets have a significant impact on the mechanical performance of FED joints, but has almost no impact on the FED system. The analysis results obtained from the simplified analysis model of the FED joints based on OpenSEES platform align well with the experimental research results. The FED system can provide additional initial stiffness and energy dissipation capacity for the steel frame structures, effectively improving their mechanical performance.

中文翻译：

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带有预制混凝土覆层板的摩擦耗能连接系统的循环行为：实验和数值研究


本研究提出了一种新型摩擦耗能 （FED） 节点，旨在将预制钢筋混凝土覆层悬挂在钢框架结构系统内的梁上。通过实验研究，研究了摩擦片材料对这些新型 FED 接头对主体结构的力学性能、耗能性能和减震效果的影响。摩擦片由 3 种金属材料和 2 种聚合物复合材料组成。随后，FED 接缝和预制混凝土覆层被视为 FED 系统。基于实验研究结果，建立了基于 OpenSEES 的 FED 系统的简化有限元分析模型。采用单层单跨钢框架，通过有限元对比分析，研究了 FED 系统对钢框架结构系统初始刚度、承载力和耗能性能的影响。研究表明，新的 FED 接头表现出可靠的连接性能，防止混凝土覆层因 FED 接头的相对滑动而过早开裂和失效。摩擦片的材料类型对 FED 接头的机械性能有重大影响，但对 FED 系统几乎没有影响。基于 OpenSEES 平台的 FED 接头简化分析模型得到的分析结果与实验研究结果吻合较好。FED 系统可以为钢框架结构提供额外的初始刚度和耗能能力，有效提高其机械性能。