Controlled rocking reinforced masonry systems for enhanced resilience under seismic risk

一场大地震确实有可能成为加拿大历史上代价最高的灾难，建筑物所有者越来越期待能够减轻这种风险的解决方案。同时，目前用加固砌块抵抗地震荷载的方法不仅与巨大的劳动力成本有关，而且还限制了加固砌块作为一种有竞争力的建筑解决方案的结构高度范围。 受控摇摆显示出解决所有这些问题的希望。在受控摇摆系统中，允许结构的选定部分在地震荷载作用下从地基上抬起，并通过附加能量耗散和/或后张法来控制这种摇摆行为。 本研究项目旨在开发一种新的受控摇摆砌体系统，该系统既能在地震荷载下施工，又能在地震荷载下恢复，并通过大型试验测试对该系统进行验证，并培训高素质的配筋砌体设计和风险缓解人员。这笔赠款将支持麦克马斯特大学、加拿大混凝土砖石生产商协会(CCMPA)和加拿大砖石设计中心(CMDC)之间的合作伙伴关系，以开发以实践为导向的方法，以提高公共安全和社区弹性，同时提高砖石在加拿大建筑业的竞争力。

There is a real potential for a major earthquake to be the costliest disaster in Canadian history, and building owners are increasingly expecting solutions that can mitigate this risk. Meanwhile, current approaches for resisting seismic loads with reinforced masonry are not only associated with significant labour costs, but they also limit the range of structural heights for which reinforced masonry is a competitive building solution. Controlled rocking shows promise for addressing all these issues. In a controlled rocking system, selected parts of the structure are permitted to uplift from the foundation in response to seismic loads, and this rocking behaviour is controlled using supplemental energy dissipation and/or post-tensioning. This research project aims to develop a new controlled rocking masonry system that is designed for both constructability and resilience under earthquake loading, to validate this system using large-scale experimental testing, and to train highly qualified personnel in reinforced masonry design and risk mitigation. This grant will support a partnership between McMaster University, the Canadian Concrete Masonry Producers Association (CCMPA), and the Canada Masonry Design Centre (CMDC), to develop practice-oriented methods for improving public safety and community resilience, while simultaneously enhancing the competitiveness of masonry within the Canadian construction industry.