Development and validation of high-capacity resilient outrigger damping system for high-rise buildings

粘弹性连体阻尼器被用来代替传统的钢筋混凝土核心梁在连体墙体结构中或安装在支腿墙体系中。尽管到目前为止的开发工作已经验证了VCD可以用于高达约250米的建筑物的典型核心墙，但为了使VCD发挥其全部潜力，需要开发、测试和验证VCD，该VCD具有用于超高和超高塔楼的特殊延性屈服保险丝和外伸支腿配置中的锁定机构。对支腿结构中的VCD进行动态实时全尺寸测试是一个特殊的挑战，因为阻尼器的尺寸大约是尺寸的两倍，并且在某些情况下，阻尼器承受的载荷比之前测试的VCD大3倍左右。另一个挑战是，VCDS与钢筋混凝土结构的连接元件在尺寸和受力要求上也有所增加，需要特殊的细节来达到所需的刚度、强度，特别是延性。VCD技术还包括锁定系统，允许设备在所有风荷载和低振幅地震荷载下在粘弹性范围内响应，但确保连接钢件在极端罕见地震荷载下具有可靠的屈服机制。拟议的研究计划将通过对为外伸支腿配置设计的大容量VCD进行广泛的全面动态测试来弥合这一差距，并完成外伸支腿配置所需的技术开发，该外伸支腿配置具有锁定和延性细节，供工程师在超高和超高建筑设计中使用。此外，还将监测真实的常规高层建筑和减震高层建筑，以提供有关其动力性能的现场数据，包括固有阻尼水平，并确认这类建筑常用的建模假设。

Viscoelastic Coupling Dampers are used to replace traditional reinforced concrete core beams in coupled wall configurations or installed within outrigger wall systems. Although the development work that has taken place to date has validated the VCD for use in core walls which is typical of buildings up to approximately 250 meters, in order to bring the VCD to its full-potential, it is required to develop, test and validate the VCD with special ductile yielding fuses and lock-up mechanisms in outrigger configurations that are used for super-tall and mega-tall towers. Dynamic real-time full-scale testing of VCDs in an outrigger configuration presents a particular challenge because the damper size is roughly double the size and the dampers are subjected to loads on the order of 3 times larger in certain cases than previously tested VCDs. A further challenge is that the connecting elements of the VCDs to the Reinforced Concrete structure also increase in size and force demands and require special detailing to achieve the required stiffness, strength and especially ductility. The VCD technology also includes a lock-up system that allows the device to respond in the viscoelastic range for all wind loading and low amplitude seismic loading but ensures a reliable yielding mechanism in the connecting steel elements for extreme rare earthquake loading. The proposed research programme will bridge this gap through extensive full-scale dynamic testing of large-capacity VCDs designed for outrigger configurations and complete the technological development that is required for the outrigger configuration with lockup and ductile detailing to be used by engineers in their super-tall and mega-tall building designs. In addition, real conventional and damped high-rise structures will be monitored to provide in-situ data on their dynamic properties, including the levels of inherent damping, and to confirm commonly used modeling assumptions for such buildings.