Next Generation of Earthquake-Resistant RC Structural Walls

下一代抗震 RC 结构墙

• 批准号: RGPIN-2014-04058
• 负责人: CruzNoguez, Carlos
• 金额: $ 1.75万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=679884
• 关键词: Next; Generation; Earthquake; Resistant; RC

In buildings located in regions where significant lateral forces exist, caused by either wind or earthquake actions, reinforced-concrete structural walls are an efficient system to safely transmit the forces from the building to the ground. In Canada, structural walls are found in a large number of buildings (apartment complexes, hospitals, industrial and nuclear facilities) located on seismically vulnerable zones. Observations made during recent earthquakes in Chile, New Zealand and Japan has shown that buildings with adequately designed walls perform well, protecting the structures against collapse. However, wall systems after the earthquake often exhibit severe damage and permanent deformations. For many affected buildings, this means that costly repair or demolition activities are needed after a seismic event. The implications of these findings for the Canadian public are far-reaching. In addition to the significant economic burden involved in repairing a damaged building, the shut-down of critical structures (such as hospitals, bridges, nuclear and telecommunication facilities) may be catastrophic during the post-earthquake relief efforts.* *Recent investigations have shown the benefits of using innovative, high-performance materials and details to reduce damage and permanent deformations in buildings and bridges. These materials are superior to conventional reinforced-concrete in many aspects; structures built with these advanced materials can withstand severe earthquakes without the need of repairs or down-time for assessment or evaluation. This is very important in the case of hospitals or critical bridge structures during the critical hours or days that immediately follow after a seismic event. It also represents significant savings since the costs of repair can be very high, both in terms of down-time or the technical expertise required.**In this proposed research, the use of several advanced materials and details in structural reinforced-concrete walls will be investigated. A Nickel-Titanium alloy with the ability to "remember" its shape after it has been unloaded, a new type of concrete with plastic fibres embedded in the mix, and an unbonded post-tensioning system are the innovative materials to be studied in this research. The experimental part of the study will consist of the seismic testing and response evaluation of several structural walls, detailed with innovative materials in areas vulnerable to damage. After the seismic tests, the ability of the innovative materials to prevent damage and to improve post-earthquake serviceability will be evaluated. Analytical models will be developed to accurately capture and predict the response of the walls, taking into account the contribution of the innovative materials. ** The aim of the study is to show that it is possible to create truly earthquake-resistant buildings that are cost-effective and feasible to build; structures that require minor or no repairs during the course of their lifetime. It is expected that, ultimately, the products and deliverables of this study (design guidelines and reliable analytical models for high-performance structural walls) lead to a safer and economical designs in buildings and other structures located in zones with high seismicity in Canada, by using innovative materials.

在因风或地震作用而存在较大侧向力的区域的建筑物中，钢筋混凝土结构墙是一种有效的系统，可以将力从建筑物安全地传递到地面。 在加拿大，位于地震易发区的大量建筑物（公寓大楼、医院、工业和核设施）中都发现了结构墙。 最近在智利、新西兰和日本发生的地震中进行的观察表明，墙壁设计充分的建筑物性能良好，可以防止建筑物倒塌。 然而，地震后的墙体系统经常表现出严重的损坏和永久变形。 对于许多受影响的建筑物来说，这意味着地震发生后需要进行昂贵的修复或拆除活动。 这些发现对加拿大公众的影响是深远的。 除了修复受损建筑物带来的巨大经济负担外，在震后救援工作中，关键结构（如医院、桥梁、核设施和电信设施）的关闭可能会造成灾难性的后果。* *最近的调查显示使用创新的高性能材料和细节来减少建筑物和桥梁的损坏和永久变形的好处。 这些材料在许多方面都优于传统的钢筋混凝土；用这些先进材料建造的结构可以承受严重的地震，无需维修或停机进行评估或评估。 对于地震事件发生后的关键时间或几天内的医院或关键桥梁结构来说，这一点非常重要。 它还代表着显着的节省，因为无论是在停机时间还是所需的技术专业知识方面，维修成本都可能非常高。 **在这项拟议的研究中，在结构钢筋混凝土墙中使用几种先进的材料和细节将被调查。 本次研究要研究的创新材料是一种在卸载后能够“记住”其形状的镍钛合金、一种在混合物中嵌入塑料纤维的新型混凝土以及一种无粘结后张拉系统。 。 该研究的实验部分将包括几个结构墙的地震测试和响应评估，并在易受损坏的区域使用创新材料进行详细说明。 地震测试后，将评估创新材料防止损坏和提高震后适用性的能力。 将开发分析模型，以准确捕获和预测墙壁的响应，同时考虑到创新材料的贡献。 ** 该研究的目的是表明，建造具有成本效益且可行的真正抗震建筑是可能的；在其使用寿命期间需要少量维修或不需要维修的结构。 预计本研究的产品和成果（高性能结构墙的设计指南和可靠的分析模型）最终将为位于加拿大地震高发区的建筑物和其他结构带来更安全、更经济的设计，使用创新材料。