Improving the Seismic Resilience of Steel Braced Frames Using Innovative Technologies

地震后的结构恢复力开始引起政府和私营企业主的特别兴趣 在2010年智利地震（8.8级）、2011年日本东北地震（9级）和2011年基督城余震之后 新西兰发生M6.3级地震。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，新 需要在抗损伤技术领域中进行开发。此外，下一代抗损伤 建筑物应该能够自我居中，并且能够以负担得起的成本进行修复。 尽管有耗能能力，但通常，所有的中心支撑框架（CBF）建筑结构，包括 那些安装了被动式消能装置的建筑物，在受到大的冲击时， 震级地震因此，本提案的主要目标是为CBF建筑物开发自定心装置， 描述新建筑系统的特征，并量化其抗震性能因素。更具体地说，在这个 应用中，两种创新的自动定心系统包括摩擦环弹簧盒和双芯压缩弹簧 提出了弹性体装置。这两种设备都能够在双向作用，以使系统自定心并提供标记 形状滞后响应这些拟议的自定心系统将被用来自定心的CBF与安装 耗散销连接和CBF配备摩擦阻尼装置。此外，创新的成本效益 本文提出了一种自对中消能支撑构件的设想和设计，以取代传统CBF建筑的支撑 系统.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，其目的是考虑安全相关的性能目标， 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。结果性能 曲线将成为决策者的宝贵工具。

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.