Seismic rehabilitation of existing concrete and masonry buildings

现有混凝土和砖石建筑的抗震修复

• 批准号: 261785-2008
• 负责人: Elwood, Kenneth
• 金额: $ 1.6万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=456115
• 关键词: Seismic; rehabilitation; existing; concrete; masonry

Several metropolitan regions in Canada, including Victoria, Vancouver, and Montreal, have experienced earthquakes in the past, and will most certainly experience earthquakes in the future. An aging infrastructure and an increase in population density in these regions has led to an increase in the risk of significant damage to buildings, bridges, and utilities in the event of a large earthquake. Recent earthquakes in California and Japan have demonstrated that concrete and masonry buildings constructed prior to the mid 1970's are particularly vulnerable to significant structural damage or even collapse. But not all concrete and masonry buildings pose a threat to life safety and building owners are frustrated with the high costs of retrofitting large inventories of existing buildings, while engineers struggle to identify the truly vulnerable buildings likely to collapse in future earthquakes. Research is needed to help engineers and building owners faced with the challenging task of reducing the seismic risk from existing structures in our urban centres through seismic rehabilitation. The proposed research will endeavour to remove obstacles facing the seismic rehabilitation of concrete and masonry buildings, thereby maximizing the reduction in seismic risk facing Canadians. In particular, the research will focus on three topics designed to contribute to an improved understanding of seismic performance of existing buildings, thereby enabling the design of cost-effective retrofit strategies: (1) the influence of strength degradation on displacement demands; (2) the sensitivity of out-of-plane response of unreinforced masonry walls to in-plane shear damage; and (3) the effect of material deterioration on the seismic performance of existing buildings.

加拿大的几个大都市区，包括维多利亚、温哥华和蒙特利尔，过去都经历过地震，而且将来也肯定会经历地震。 这些地区基础设施老化和人口密度增加导致发生大地震时建筑物、桥梁和公用设施遭受重大损坏的风险增加。 最近加利福尼亚州和日本发生的地震表明，1970 年代中期之前建造的混凝土和砖石建筑特别容易遭受重大结构损坏甚至倒塌。 但并非所有混凝土和砖石建筑都对生命安全构成威胁，业主对改造大量现有建筑的高昂成本感到沮丧，而工程师们则努力找出可能在未来地震中倒塌的真正脆弱建筑。需要进行研究来帮助工程师和建筑业主应对一项艰巨的任务，即通过地震修复来降低城市中心现有结构的地震风险。 拟议的研究将努力消除混凝土和砖石建筑抗震修复面临的障碍，从而最大限度地减少加拿大人面临的地震风险。 特别是，该研究将重点关注三个主题，旨在有助于更好地了解现有建筑物的抗震性能，从而能够设计具有成本效益的改造策略：（1）强度退化对位移需求的影响； (2)无筋砌体墙面外响应对面内剪切损伤的敏感性； (3)材料劣化对既有建筑抗震性能的影响。