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.

在建筑物位于由风或地震作用引起的显著侧向力存在的地区，钢筋混凝土结构墙是一种有效的系统，可以安全地将建筑物的力传递到地面。在加拿大，位于易受地震影响地区的大量建筑物（公寓大楼、医院、工业和核设施）都有结构墙。最近在智利、新西兰和日本发生的地震中所做的观察表明，有适当设计的墙壁的建筑物表现良好，可以保护建筑物免于倒塌。然而，地震后墙体系统往往表现出严重的破坏和永久变形。对于许多受影响的建筑物来说，这意味着在地震事件发生后需要进行昂贵的维修或拆除活动。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所涉及的重大经济负担外，关键结构（如医院、桥梁、核设施和电信设施）的关闭在震后救济工作期间可能是灾难性的。* *最近的研究表明，使用创新的高性能材料和细节可以减少建筑物和桥梁的损坏和永久变形。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，而不需要维修或停机进行评估或评估。在地震发生后的关键时间内，这对于医院或关键桥梁结构来说是非常重要的。它还代表了显著的节省，因为维修成本可能非常高，无论是在停机时间还是所需的技术专业知识方面。**在这项拟议的研究中，将研究几种先进材料在结构钢筋混凝土墙中的使用和细节。一种能够在卸载后“记住”其形状的镍钛合金，一种嵌入塑料纤维的新型混凝土，以及一种无粘结后张紧系统是本研究中要研究的创新材料。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，在易损坏的区域详细使用创新材料。在地震试验后，将对创新材料的防破坏能力和提高震后使用能力进行评估。将开发分析模型，以准确地捕捉和预测墙壁的响应，并考虑到创新材料的贡献。**这项研究的目的是表明建造真正具有成本效益和可行性的抗震建筑是可能的；在其使用寿命期间只需要少量维修或不需要维修的建筑物。预计，最终，本研究的产品和交付成果（高性能结构墙的设计指南和可靠的分析模型）将通过使用创新材料，为加拿大地震高发地区的建筑物和其他结构带来更安全、更经济的设计。