Nonlinear analysis tools for rapid assessment of structural resilience

用于快速评估结构弹性的非线性分析工具

• 批准号: 249975-2013
• 负责人: Bentz, Evan
• 金额: $ 1.75万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570779
• 关键词: Nonlinear; analysis; tools; rapid; assessment

In 2011, large earthquakes and natural disasters in Christchurch, New Zealand, and Japan demonstrated that existing structures are not yet sufficiently resilient to survive extreme events. One thing that was learned from both disasters but particularly from the New Zealand one is that immediately after a major event, there is significant confusion about which reinforced and prestressed concrete structures can be immediately returned to service, which should be temporarily closed and which should be permanently closed and demolished. Why this is of critical importance is that additional events, such as aftershocks, will occur after the initial event and can cause damaged buildings to collapse. In this project it is proposed develop an analysis tool that will allow rapid assessment of the safety of structures after an extreme event has occurred. To do this, the analysis needs to have a carefully reduced number of equations to solve as existing methods, while generally accurate, take too long to perform for after-the-event calculations that are desired. Recent advances allow this type of efficiency to be capitalized on for the first time for structural analysis and design. In addition to allowing rapid diagnosis of structural problems, the same tool will allow design engineers to engage in performance based design. This means that more innovative structural systems can be numerically experimented with to determine how newer designs and newer materials, such as FRP, will affect the overall structure. This project will employ six students over 5 years to develop the system and then use it to further their knowledge of structural behaviour. This will make the Canadian engineering firms that employ them, and which use the new tools, better able to compete in the global engineering market.

2011年，基督城，新西兰和日本的大地震和自然灾害表明，现有的结构尚未足够弹性，无法在极端事件中生存。 从两种灾难中学到的一件事，尤其是从新西兰那里学到的一件事是，在重大事件发生后，立即使加固和预应力的混凝土结构可以立即返回服务，这引起了极大的困惑，应暂时关闭，这些结构应暂时关闭，应永久关闭并拆除。 为什么这至关重要的是，其他事件（例如余震）将在初次事件发生后发生，并可能导致建筑物崩溃。 在这个项目中，提议开发一个分析工具，该工具将允许在发生极端事件后快速评估结构的安全性。 为此，分析需要精心降低数量的方程数来求解作为现有方法，尽管通常准确地进行了时间，但对于所需的事后计算而言，要执行的时间太长。 最近的进步使这类效率首次可以进行结构分析和设计。 除了允许快速诊断结构问题外，同一工具还将允许设计工程师从事基于性能的设计。 这意味着可以在数值上尝试更具创新性的结构系统，以确定更新的设计和较新材料（例如FRP）如何影响整体结构。 该项目将在5年内雇用六名学生来开发系统，然后使用它来进一步了解结构行为的知识。 这将使加拿大工程公司雇用它们，并使用新工具，能够更好地在全球工程市场中竞争。