Seismic Design and Retrofit of Reinforced Masonry Buildings

配筋砌体建筑的抗震设计与改造

• 批准号: RGPIN-2015-04842
• 负责人: Galal, Khaled
• 金额: $ 2.04万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=613199
• 关键词: Seismic; Design; Retrofit; Reinforced; Masonry

A serious life-safety hazard for buildings located in seismic areas is the high potential of suffering severe damage or collapse if they are not designed and detailed to perform well when subjected to ground motion excitations. Unlike recent (and next generation) performance-based seismic design guidelines that enforce the ductility and capacity design concepts, many existing buildings were designed using older (and current) force-based design codes and lack appropriate ductility and energy dissipation capacities.     Despite the considerable size of reinforced masonry (RM) construction industry in Canada, there is limited research that investigates the seismic performance of RM buildings as compared to their counterpart, reinforced concrete (RC). Canada has seismic active zones in its West and East regions. Reinforced masonry shear walls are typically used in medium to high rise masonry buildings as part of the lateral force resisting system to provide the lateral strength, stiffness and energy dissipation capacity required to resist lateral loads arising from earthquakes or wind. The behaviour of RM shear walls in the plastic hinge zone is more complicated than RC walls due to the interaction between the nonlinear responses of their constituent materials (masonry, mortar, reinforcement and grout). The complexity in simulating the response is further emphasized when considering the two types of RM construction: partially grouted and fully grouted.     Whether it is a new reinforced masonry building or an existing one, there is vital need to develop novel and creative engineering solutions to safeguard the society against potential structural seismic failures. This objective will be achieved by conducting the proposed research program along two parallel, yet interrelated, axes: (1) To develop efficient ductile seismic force resisting systems for new RM shear wall buildings, and (2) To develop efficient retrofit methods for enhancing the ductility of existing RM shear wall buildings. The specific research focus within the above two goals will be to: (1a) Investigate the seismic behaviour of RM walls with limited or moderate ductility; (1b) Investigate the seismic behaviour of ductile RM walls; (1c) Develop analytical tools for predicting the seismic response of new RM buildings; (2a) Develop seismic retrofit methods for shear critical RM walls; and (2b) Develop analytical tools for predicting the seismic response of retrofitted RM buildings.     Besides the enhanced seismic hazard safety in Canada, the proposed research program will generate new experimental and analytical fundamental knowledge, practical advancements, code design provisions and prescriptive detailing requirements, as well as contribute to training of highly qualified personnel, which will have significant impact for the end users and stakeholders of the multi-billion dollar masonry design and construction industries.

对于位于地震区的建筑物来说，一个严重的生命安全隐患是，如果它们的设计和细节在受到地面运动激励时表现不佳，就很有可能遭受严重的破坏或倒塌。与最近（和下一代）基于性能的抗震设计指南不同，许多现有建筑的设计使用旧的（和当前的）基于力的设计规范，缺乏适当的延性和耗能能力。