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

高层建筑大容量弹性支腿阻尼系统的开发与验证

• 批准号: 500184-2016
• 负责人: Christopoulos, Constantin
• 金额: $ 6.05万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Idea to Innovation
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618093
• 关键词: Development; validation; capacity; resilient; outrigger

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.

粘弹性耦合阻尼器用于取代传统的钢筋混凝土核心梁耦合墙配置或安装在悬臂墙系统。尽管迄今为止已经进行的开发工作已经验证了VCD可用于高达约250米的典型建筑物的心墙，但为了使VCD充分发挥其潜力，需要开发、测试和验证VCD，其具有用于超高和超高层塔楼的悬臂结构中的特殊延性屈服保险丝和锁定机构。在外伸支架配置中的VCD的动态实时全尺寸测试提出了一个特殊的挑战，因为阻尼器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先前测试的VCD大3倍。另一个挑战是，VCD与钢筋混凝土结构的连接元件的尺寸和力需求也增加，并且需要特殊的细节来实现所需的刚度、强度，特别是延展性。VCD技术还包括一个锁定系统，该系统允许设备在粘弹性范围内对所有风荷载和低振幅地震荷载做出响应，但确保连接钢元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设计用于支腿配置的大容量VCD进行广泛的全尺寸动态测试来弥补这一差距，并完成工程师在其超高层和超高层建筑设计中使用的具有锁定和延性细节的支腿配置所需的技术开发。此外，还将监测真实的常规和阻尼高层结构，以提供其动态特性的现场数据，包括固有阻尼水平，并确认此类建筑物常用的建模假设。