ABSTRACT

To satisfy the resilient requirements, a novel dual-self-centering variable friction damper (DSC-VFD) brace with self-centering variable friction damper systems and basalt fiber-reinforced polymer tendons, is proposed. The working mechanism of the DSC-VFD brace was first investigated. Then, four DSC-VFD and SC-VFD braces with different groove angles were designed, and quasi-static experiments were conducted. Finally, finite element models of the DSC-VFD braced frame were created and the seismic responses of the frames were analyzed. The results show that the DSC-VFD brace presents a novel flag shape with large post-yield stiffness and enhanced energy dissipation which can effectively control the structural responses.

摘要

为了满足弹性要求，提出了一种具有自定心可变摩擦阻尼系统和玄武岩纤维增强聚合物筋的新型双自定心可变摩擦阻尼器 (DSC-VFD) 支撑。首先研究了 DSC-VFD 支架的工作机制。然后，设计了四种不同槽角的DSC-VFD和SC-VFD支撑，并进行了准静态试验。最后，建立了 DSC-VFD 支撑框架的有限元模型，并对框架的地震响应进行了分析。结果表明，DSC-VFD 支撑呈现出一种新颖的旗形形状，具有较大的屈服后刚度和增强的能量耗散，可以有效地控制结构响应。