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Design of yielding metallic and friction dampers for optimal seismic performance

机译：设计屈服金属和摩擦阻尼器以实现最佳抗震性能

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摘要

This paper deals with the optimal design of yielding metallic dampers and friction dampers together as they both have similar design characteristics and parameters. Ample tests and analytical studies have confirmed the effectiveness of these energy dissipation devices for seismic response control and protection of building structures. Since these devices are strongly non-linear with several parameters controlling their behaviour, their current design procedures are usually cumbersome and not optimal. In this paper, a methodology is presented to determine the optimal design parameters for the devices installed at different locations in a building for a desired performance objective. For a yielding metallic damper, the design parameters of interest are the device yield level, device stiffness, and brace stiffness. For a friction device, the parameters are the slip load level and brace stiffness. Since the devices and the structures installed with these devices behave in a highly non-linearly manner, and thus must be evaluated by a step-by-step time history approach, the genetic algorithm is used to obtain the globally optimal solution. This optimal search approach allows an unusual flexibility in the choice of performance objectives. For demonstration purposes, several sets of numerical examples of optimal damper designs with different performance objectives are presented.
机译：本文讨论了屈服金属阻尼器和摩擦阻尼器的优化设计，因为它们都具有相似的设计特性和参数。大量的测试和分析研究证实了这些能量消散装置对于地震响应控制和建筑结构保护的有效性。由于这些设备是高度非线性的，具有几个参数来控制它们的性能，因此，它们当前的设计过程通常很麻烦并且不是最佳的。在本文中，提出了一种方法，用于为安装在建筑物中不同位置的设备确定理想的性能目标的最佳设计参数。对于屈服金属阻尼器，感兴趣的设计参数是设备屈服水平，设备刚度和支撑刚度。对于摩擦装置，参数是滑动载荷水平和支撑刚度。由于设备和安装有这些设备的结构的行为高度非线性，因此必须通过逐步的时间历史方法进行评估，因此使用遗传算法来获得全局最优解。这种最佳搜索方法为性能目标的选择提供了极大的灵活性。为了演示，给出了具有不同性能指标的最佳减振器设计的数个数值示例。

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