Seismic behaviour of tall reinforced masonry shear walls

加筋砖石(RM)在加拿大已有50多年的历史，主要用于建造低层和中层建筑。加拿大国家建筑规范2015(NBC 2015)允许高层砖混建筑使用延性剪力墙等级，但对于中等地震危险指数(0.75或更低)的场地，高度限制为60米(约20层)，对于高地震危险场地(地震危险指数高于0.75)，高度限制为40米(约13层)。尽管NBC 2015允许在加拿大高层建筑中应用延性RM墙类，其高度限制与RC剪力墙建筑相当，但这些建筑的实际现场应用仍然非常有限。到目前为止，加拿大只建造了几座高(20层高)的RM建筑，大多位于地震风险较低到中等的地点。高层建筑在加拿大的现场应用有限可以部分归因于过去关于这一主题的实验研究研究的数据库稀缺。拟议的项目将研究加拿大现场应用的高层配筋砖石(TRM)剪力墙的地震反应，并有机会将这些知识输出到其他国家。该提案包括一个强有力的实验和分析研究计划，该计划将在不列颠哥伦比亚大学温哥华校区进行。高高宽比的TRM剪力墙试件(在7.0-25.0范围内)的地震反应将从材料、结构构件和结构体系三个层面进行研究。为了研究TRM建筑在地震激励下的地震反应，将在系统水平上进行试验和数值模拟相结合的研究。这被认为是首次在全球范围内将混合技术应用于TRM墙体结构。本项目提出的试验方案将为从事高层建筑设计和施工的开发商、建筑师和工程师提供与TRM剪力墙抗震性能相关的急需的试验证据。实验和分析研究得出的准则将为目前没有接受过与高层砖石建筑设计有关的充分培训的设计工程师提供必要的工具。

Reinforced masonry (RM) has been used in Canada for more than 50 years, mostly for construction of low- and medium-rise buildings. The National Building Code of Canada 2015 (NBC 2015) permits the use of Ductile Shear Wall class for tall masonry buildings, but the height limit was set to 60 m (approximately 20 storeys) at sites characterized by moderate seismic hazard index (0.75 or less), and to 40 m (approximately 13 storeys) for high seismic hazard sites (seismic hazard index higher than 0.75). Although the NBC 2015 permits application of ductile RM wall class for construction of tall buildings in Canada, with the height limits comparable to buildings with RC shear walls, actual field applications of these buildings are still very limited. Only a few tall (20+ storey high) RM buildings have been constructed in Canada to date, mostly at sites with low to moderate seismic hazard. Limited field applications of tall buildings in Canada can be partially attributed to a scarce database of past experimental research studies on the subject.The proposed project will examine seismic response of Tall Reinforced Masonry (TRM) shear walls for field applications in Canada with opportunities to export this knowledge to other countries. The proposal includes a robust experimental and analytical research program which will be carried out at the University of British Columbia, Vancouver campus. Seismic response of TRM shear wall specimens characterized by high aspect ratios (in the range from 7.0 to 25.0) will be examined at the material, structural component, and structural system level. A hybrid experimental and numerical simulation will be performed at the system level to study seismic response of TRM buildings subjected to earthquake excitation. This is believed to be the first application of hybrid technology on TRM wall structures on a global scale. The experimental program proposed in this project will provide much needed experimental evidence related to seismic performance of TRM shear walls which is required for developers, architects, and engineers engaged in design and construction of tall buildings. The guidelines resulting from the experimental and analytical studies will provide required tools for design engineers who currently do not have adequate training related to design of tall masonry buildings.