Characterisation and advanced modeling of multidimensional strain-rate effects on structural steels for enhanced seismic design of building structures in Canada

结构钢多维应变率效应的表征和高级建模，用于增强加拿大建筑结构的抗震设计

• 批准号: 402309-2012
• 负责人: Lamarche, CharlesPhilippe
• 金额: $ 1.68万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529519
• 关键词: Characterisation; advanced; modeling; multidimensional; strain

Low-rise steel buildings used for light industrial, commercial, and recreational purposes, represent a vast proportion of the building stock in Canada. Most of these buildings are located in regions of active and moderate seismicity levels on the Pacific coast and along the St-Lawrence and Ottawa rivers. For this type of building, the National Building Code of Canada imposes a capacity design philosophy for the design of various seismic force resisting systems (SFRS), for which inelastic response is anticipated under severe dynamic excitation such as earthquakes. During this type of event, the strain-rates in ductile SFRS tend to be very high which causes the material to behave differently than when loaded slowly. For this reason, not taking into account strain-rates when designing and/or numerically simulating the response of a structure in such context might lead to erroneous conclusions on the structure's expected behaviour and expected modes of failure.

用于轻工业、商业和娱乐目的的低层钢结构建筑占加拿大建筑存量的很大比例。这些建筑大多位于太平洋沿岸以及圣劳伦斯河和渥太华河沿岸地震活动活跃和中等水平的地区。对于这种类型的建筑，加拿大国家建筑规范为各种抗震系统(SFR)的设计强加了一种能力设计理念，这些系统在地震等强烈动力激励下预计会有非弹性响应。在这类事件中，延性SFR的应变率往往非常高，这导致材料的行为与缓慢加载时不同。因此，在设计和/或数值模拟结构在这种情况下的响应时，不考虑应变率可能会导致对结构的预期行为和预期失效模式的错误结论。