Controlled rocking steel systems: from concept to design

受控摇摆钢系统：从概念到设计

• 批准号: RGPIN-2014-04409
• 负责人: Wiebe, Lydell
• 金额: $ 1.75万
• 依托单位: McMaster 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=668529
• 关键词: Controlled; rocking; steel; systems; concept

The public generally assumes that new buildings are "earthquake-proof," meaning that they could be used after an earthquake without repair. However, current design codes attempt only to ensure that a building can be safely evacuated after an earthquake. Therefore, code-compliant structures are likely to be damaged by design-level earthquakes, even if they behave exactly as intended. This was recently demonstrated in Christchurch, New Zealand, where a series of earthquakes in 2010-2011 has led to the demolition of 70% of the buildings in the central business district. In 2013, a report commissioned by the Insurance Bureau of Canada warned of $75 billion in losses due to the kind of earthquake that is expected to occur off the west coast. The extreme socio-economic cost of such disasters calls into question the wisdom of a design philosophy that accepts damage. However, this philosophy is unlikely to change unless systems with better performance can be built without greatly increasing the initial construction cost. This research program will greatly improve the resilience and sustainability of built infrastructure, which is at the core of the Canadian economy, by developing economical systems that can withstand earthquakes without structural damage.* One particular system that shows promise for improving seismic resilience at a competitive initial cost is a Controlled Rocking Steel System. Although significant progress has been made on understanding this system, several key questions prevent it from being implemented widely. Over the next 5 years, this research program will answer the most pressing questions that prevent Controlled Rocking Steel Systems from moving from concept to design. As these questions are answered, a Canadian design guideline will be developed, and over the next 5-10 years, this is expected to lead to Controlled Rocking Steel Systems being specified as an acceptable seismic force resisting system in the National Building Code of Canada (NBCC), with appropriate provisions in Section 27 of the Canadian Steel Standard CSA S16. The long-term objective of this research program is to make damage avoidance a routine part of seismic design for all structures in Canada, rather than being a special design objective that is reserved for exceptional structures.

公众通常认为新建筑物是“防震的”，这意味着它们在地震后可以在没有修复的情况下使用。但是，当前的设计代码只是试图确保地震后可以安全撤离建筑物。因此，即使设计级地震的行为完全按照预期，符合代码的结构也可能会受到设计级地震的破坏。最近在新西兰基督城证明了这一点，2010 - 2011年的一系列地震导致中央商务区70％的建筑物拆除。 2013年，加拿大保险局委托的一份报告警告说，由于预计将在西海岸发生的地震造成的750亿美元损失。这种灾难的极端社会经济成本使人们质疑接受损害的设计理念的智慧。但是，除非可以建立更好的性能的系统而不会大大增加初始施工成本，否则这种理念不太可能改变。该研究计划将通过发展经济的系统可以承受无结构损害的经济系统，从而大大改善建筑基础设施的弹性和可持续性，这是加拿大经济的核心。初始成本是一种受控的摇摆钢系统。尽管在理解该系统方面取得了重大进展，但几个关键问题阻止了它的实施。在接下来的5年中，该研究计划将回答最紧迫的问题，以防止受控的摇摆钢系统从概念到设计。随着这些问题的回答，将制定一项加拿大设计指南，在接下来的5 - 10年中，预计这将导致在加拿大国家建筑法典中将受控的摇摆钢系统指定为可接受的地震力抵抗系统（ NBCC），在加拿大钢制标准CSA S16的第27节中提供适当的规定。该研究计划的长期目标是使避免损害成为加拿大所有结构的地震设计的常规部分，而不是作为特殊的设计目标，该目标是为特殊结构保留的。