Past earthquakes have shown that traditional structural design relies on the component ductility to dissipate the earthquake energy. This has led to significant damage for the structure. Innovative energy dissipation devices have been developed in the past to dissipate the earthquake energy. However, the big disadvantage of traditional energy dissipation devices is the lack of self‐centering capabilities. This results to significant residual deformation, which can significantly affect the building resilience. Failing to eliminate the residual deformation can lead to prolong downtime and significant financial losses. In this paper, a novel damper named self‐centering conical friction damper (SCFD) is proposed. SCFD utilizes conical surfaces and posttensioning tendons to resist the earthquake loads in all directions. The conical surfaces force the SCFD to self‐center, making the SCFD highly desired for earthquake applications. In this paper, detailed mechanical behavior for the SCFD is presented. The hysteresis behavior was verified through the experimental tests. The result shows that the proposed theoretical equations can predict the hysteresis response of the SCFD well. Using the derived equations, detailed parameter study including the influences of pretension forces, effective stiffness of posttension tendons, slope angle, and friction coefficients have been investigated. Results show that the hysteresis behavior can be achieved using different combinations of the slope angle, Pretension (PT) tendons, and friction coefficients. Overall, high slope and friction coefficients will lead to highly efficient SCFD with lower demands on the PT tendons. Detailed design approaches have been presented, which allows the engineers to design SCDF for different applications.

中文翻译：

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新型自定心锥形摩擦阻尼器的机理与实验验证

过去的地震表明，传统的结构设计依靠构件的延性来耗散地震能量。这导致了结构的重大损坏。过去已经开发出创新的消能装置来消散地震能量。但是，传统耗能设备的最大缺点是缺乏自定心功能。这导致显着的残余变形，这会显着影响建筑物的弹性。未能消除残留变形会导致较长的停机时间和重大的财务损失。本文提出了一种新型的自定心圆锥摩擦阻尼器（SCFD）。SCFD利用锥形表面和后张拉筋来抵抗所有方向的地震载荷。圆锥形表面迫使SCFD自对中，这使得SCFD非常适合地震应用。在本文中，详细介绍了SCFD的力学行为。通过实验测试证实了磁滞行为。结果表明，所提出的理论方程可以很好地预测SCFD的滞后响应。使用推导的方程，对详细的参数研究进行了研究，包括预紧力，后张筋的有效刚度，倾斜角和摩擦系数的影响。结果表明，通过将倾斜角，预应力（PT）肌腱和摩擦系数进行不同的组合，可以实现磁滞行为。总体而言，高的坡度和摩擦系数将导致高效的SCFD，而对PT筋的要求却较低。