Improving the Seismic Resilience of Steel Braced Frames Using Innovative Technologies

利用创新技术提高钢支撑框架的抗震能力

• 批准号: RGPIN-2017-05173
• 负责人: Tirca, Lucia
• 金额: $ 1.53万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=666874
• 关键词: Improving; Seismic; Resilience; Steel; Braced

The post-earthquake structural resilience started to be of particular interest to governments and private businesses owners*after the 2010 Chile earthquake (M 8.8), the 2011 Tohoku earthquake in Japan (M9), and the 2011 Christchurch aftershock*earthquake in New Zealand (M6.3). Researchers concluded that a resilient structural system should be able to: reduce*probabilities of structure failure, reduce consequences from failures, and reduce recovery time. To achieve this goal, new*developments in the field of damage-resistant technologies are required. Furthermore, the next generation of damage-resistant*buildings should be able to self-center and to be reparable at an affordable cost.****Despite of energy dissipation capacity, commonly, all concentrically braced frame (CBF) building structures including*those with installed passive energy dissipation devices have shown high residual interstorey drift when subjected to large*magnitude earthquakes. Thus, the main objective of this proposal is to develop self-centering devices for CBF buildings, to*characterize the new building system, as well as to quantify their seismic performance factors. More specifically, in this*application, two innovative self-centering systems comprising friction ring springs cartridges and dual-core compressed*elastomer devices are proposed. Both devices are able to act in dual direction, to self-center the system and to provide flag*shape hysteresis response. These proposed self-centering systems will be employed to self-center the CBFs with installed*dissipative pin connections and CBFs equipped with friction damper devices. In addition, an innovative cost-efficient*self-centering energy dissipating brace member is envisioned and designed to replace braces of traditional CBF building*systems. Design guidelines, quantification of buildings seismic performance factors, as well as, a framework for life-cycle based design will be provided. For the life-cycle based design method it is intended to consider safety-related performance goals in*terms of the risk of life loss and financial losses including repair and downtime rather than collapse. The resulted performance*curves will be a valuable tool for decision-makers.

在2010年智利地震（M8.8）、2011年日本东北地震（M9）和2011年新西兰基督城余震 *（M6.3）之后，政府和私营企业主开始对震后结构恢复力特别感兴趣。研究人员得出结论，弹性结构系统应该能够：降低结构故障的概率，减少故障的后果，并减少恢复时间。为了实现这一目标，需要在抗损伤技术领域取得新的发展。此外，下一代的抗破坏建筑应该能够自我中心，并以可承受的成本进行修复。尽管有耗能能力，但通常情况下，所有的中心支撑框架（CBF）建筑结构，包括安装被动耗能装置的结构，在大震级地震作用下都表现出较高的残余层间位移。因此，本提案的主要目标是为CBF建筑开发自定心装置，以表征新建筑系统，并量化其抗震性能因素。更具体地说，在本申请中，提出了两种创新的自定心系统，包括摩擦环弹簧盒和双核压缩弹性体装置。这两种器件都能够在双向作用，使系统自定心，并提供旗形滞后响应。这些建议的自定心系统将被用来自定心CBF与安装 * 耗散销连接和CBF配备摩擦阻尼器装置。此外，一个创新的成本效益 * 自定心耗能支撑构件的设想和设计，以取代传统的CBF建筑 * 系统的支撑。将提供设计指南、建筑物抗震性能因素的量化以及基于生命周期的设计框架。对于基于寿命周期的设计方法，其目的是考虑与安全相关的性能目标，包括生命损失和财务损失的风险，包括维修和停机时间，而不是崩溃。由此产生的性能 * 曲线将成为决策者的宝贵工具。