Development of High Performance Control Systems for Wind Response Mitigation

开发用于减轻风响应的高性能控制系统

• 批准号: 1537626
• 负责人: Simon Laflamme
• 金额: $ 39.9万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1537626&HistoricalAwards=false
• 关键词: Development; Performance; Control; Systems; Wind

In recent years, there has been an increased shift towards the performance-based analysis and design of buildings to resist natural hazards such as earthquakes and wind. The new paradigm of incorporating high performance control systems to increase building performance under these hazards is promising. Control systems are adaptable devices capable of high energy absorption that would significantly reduce the structural response. However, their design is not holistically integrated into the structural design process in a way that would ensure attaining the targeted performance level of response. This is mostly due to the high range of variability in available control systems, the uncertainties associated with the performance of the control systems and the building, variability in the type of loading in a multi-hazard scheme, and unclear definition of performance measures when it comes to wind loads. The goal of this research is to develop a holistic integration control systems directly at the design stage, with particular attention to structures subjected to a variety of wind hazards, including thunderstorms, hurricanes, gust-fronts, and tornadoes. This methodology will empower the design engineers with technical and financial arguments supporting the integration of control systems within the structural system. By validating the potential benefits of control systems, there will be an increasing number of applications of these systems, enabling an integrated design approach for meeting the performance criteria set for structural response in windstorms. The focus of this project is to develop a probabilistic performance-based methodology for structures equipped with high performance control systems. The objective of the project is twofold: (1) to establish a performance-based methodology that includes the variability of control systems and (2) to support the integration of control systems for wind response mitigation. Loads and response data will be produced using physical models of structures subjected to a variety of wind loads using a boundary-layer wind tunnel, and tornado and microburst simulation facilities. The notion of control system performance, including sensor failure, power failure, and controller sub-performance will be integrated in the procedure using an integrated probabilistic approach. Control systems will be developed following the procedure, which will include a novel variable friction device. Physics based numerical simulations will be developed to validate and demonstrate the performance-based methodology for control systems. These simulations will enable the analysis of life-cycle performance of a structure equipped with control systems under a set of scenarios. Novel quantitative metrics will be formulated to characterize structural performance versus performance of the control systems.

近年来，越来越多的建筑转向基于性能的分析和设计，以抵御地震和风力等自然灾害。结合高性能控制系统来提高建筑在这些危险下的性能的新范例是有希望的。控制系统是适应性强的装置，能够吸收高能量，从而显著降低结构响应。然而，它们的设计并没有整体地集成到结构设计过程中，以确保达到目标的响应性能水平。这主要是由于可用控制系统的高可变性，与控制系统和建筑物性能相关的不确定性，多危害方案中负载类型的可变性，以及当涉及到风荷载时性能测量的不明确定义。本研究的目标是直接在设计阶段开发一个整体集成控制系统，特别关注遭受各种风危害的结构，包括雷暴、飓风、阵风锋和龙卷风。这种方法将为设计工程师提供技术和财务论证，以支持结构系统内控制系统的集成。通过验证控制系统的潜在优势，这些系统的应用将越来越多，从而实现集成设计方法，以满足风暴中结构响应的性能标准。该项目的重点是为配备高性能控制系统的结构开发基于概率性能的方法。该项目的目标是双重的：(1)建立一种基于性能的方法，其中包括控制系统的可变性；(2)支持控制系统的一体化，以减轻风的反应。荷载和响应数据将通过使用边界层风洞、龙卷风和微爆模拟设施，利用受各种风荷载影响的结构的物理模型来产生。控制系统性能的概念，包括传感器故障、电源故障和控制器子性能将使用集成概率方法集成在程序中。控制系统将按照程序开发，其中将包括一个新的可变摩擦装置。将开发基于物理的数值模拟来验证和演示基于性能的控制系统方法。这些模拟将能够在一系列场景下分析配备控制系统的结构的生命周期性能。将制定新的定量指标来表征结构性能与控制系统的性能。