A new multi-scale approach to characterize concrete creep and its implications in long-term durability

一种新的多尺度方法来表征混凝土徐变及其对长期耐久性的影响

• 批准号: RGPIN-2016-06077
• 负责人: Sorelli, Luca
• 金额: $ 1.75万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636084
• 关键词: new; multi; scale; approach; characterize

A recent survey on 71 concrete bridges monitored over a period of about 20 years showed that the creep deflection increases incessantly and it overestimates by far the predictions of several national codes. A wake-up call was then launched stating that the current national design recommendations and codes “are not only theoretically obsolete, but also indefensible”. The proposed research program aims at better understanding and characterizing the long term creep of concrete, and finally, to enhance the current design methods for predicting the long term behavior.

最近对71座混凝土桥梁进行了为期约20年的监测调查，结果表明徐变挠度不断增加，并且高估了几个国家规范的预测。随后发出了警钟，指出目前的国家设计建议和规范“不仅在理论上过时，而且站不住脚”。建议的研究计划旨在更好地理解和表征混凝土的长期徐变，并最终提高目前的设计方法预测的长期行为。