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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=651427
• 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.**

在地震地区的建筑物的严重生命安全危险是遭受严重破坏或崩溃的高潜力，如果他们的设计和详细措施在受到地面运动兴奋时表现良好。与执行延展性和容量设计概念的最新（和下一代）基于绩效的地震设计指南不同，许多现有建筑物都是使用基于较旧（和当前）的基于力量的设计代码设计的，并且缺乏适当的延展性和能量耗散能力。 ***尽管考虑了加拿大加固砌体（RM）建筑业的考虑大小，但与同行，钢筋混凝土（RC）相比，研究有限的研究研究了RM建筑物的地震性能。加拿大在其西部和东部地区都有地震活跃区。加固的砌体剪力壁通常用于中型至高层砌体建筑物中，作为抵抗横向力系统的一部分，以提供横向强度，刚度和能量耗散能力，以抵抗地震或风产生的横向负载。由于其构成材料的非线性响应（砌体，砂浆，钢筋和灌浆）之间的相互作用，塑料铰链带中RM剪力壁的行为比RC壁更为复杂。在考虑两种类型的RM结构时，进一步强调了模拟响应的复杂性：部分生长和完全成长。将通过沿两个平行但相互关联的轴进行提出的研究计划来实现这一目标：（1）为新的RM剪切壁建筑物开发有效的延性地震力系统，以及（2）开发有效的改造方法，以增强现有RM剪切壁建筑物的易接力。上述两个目标中的具体研究重点是：（1a）研究具有有限或中度延展性的RM壁的地震行为； （1B）研究延性RM壁的地震行为； （1C）开发用于预测新RM建筑物的地震反应的分析工具； （2a）开发用于剪切临界RM壁的地震改造方法； （2b）开发分析工具来预测改造的RM建筑物的地震反应。砖石设计和建筑行业。**