Behaviour and design of concrete masonry infill walls

混凝土砌体填充墙的性能和设计

• 批准号: 401965-2010
• 负责人: Liu, Yi
• 金额: $ 0.41万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 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=596030
• 关键词: Behaviour; design; concrete; masonry; infill

Masonry infill walls are commonly used as interior partitions as well as exterior wall infills in both steel and reinforced concrete frames in modern building construction. Due to the lack of scientific information in quantifying the extent of composite action between the infill and the frame, the common design practice applied in industry has been to treat masonry infill walls as non-structural elements and to design frames for both gravity and lateral loading. The contribution of masonry infill walls to the frame stiffness and strength is therefore ignored. It is, however, a misconception that ignoring the contribution of the infill wall is a conservative approach. Infill walls significantly stiffen the frame and thus reduce its ductility, which in turn attracts larger forces to the infill region in a structure. The poorly designed infill walls have been identified as a contributing factor to catastrophic structural failures in earthquakes. Although the current Canadian masonry design standard CSA S304 provides equations for the consideration of infill stiffness and strength, the values obtained using these equations are found to be in disparity with those obtained from experimental testing conducted by various researchers and also with values obtained from other recognized codes such as New Zealand masonry code NZS 4230 and Eurocode 8. In order to incorporate masonry infills in the design of lateral and gravity load resisting systems of a structure, the rational and accurate evaluation of their stiffness and strength is crucial. This proposal is therefore motivated to investigate, both experimentally and analytically, the behaviour and capacity of masonry infill walls with the focus on the concrete block masonry infills. The stiffness, strength and failure modes of infill walls will be studied for various material, geometric and loading characteristics. This research, upon its completition, is expected to contribute to the advancement of a rational design approach for masonry infill walls and associated infilled frames and to provide recommendations for practical implementation.

砌体填充墙通常用作内部分区，以及现代建筑建筑中钢和钢筋混凝土框架中的外墙填充物。由于缺乏量化填充填充物和框架之间复合作用程度的科学信息，因此在工业中应用的常见设计实践是将砌体填充墙视为非结构性元素，并设计用于重力和侧向负载的框架。因此忽略了砖石填充墙对框架刚度和强度的贡献。但是，误解是忽略填充墙的贡献是一种保守的方法。填充壁显着加强框架，从而减少其延展性，从而在结构中吸引了更大的力到填充区域。设计较差的填充壁已被确定为造成地震中灾难性结构性故障的促成因素。尽管当前的加拿大砌体设计标准CSA S304提供了考虑填充刚度和强度的方程式，但发现使用这些方程获得的值与来自各种研究人员进行的实验测试获得的值以及从新西兰糖果4230和Eulocode Information Inflill of Mason Inforl in of Mason Inform ins of Mason。抵抗结构的系统，对其刚度和强度的合理和准确评估至关重要。因此，该提案是在实验和分析上促使砌体填充壁的行为和能力进行调查，重点是混凝土砌块砌体填充物。将研究填充壁的刚度，强度和故障模式，以针对各种材料，几何和加载特性。这项研究在完成后，有望为砖石填充墙和相关填充框架的合理设计方法的发展做出贡献，并为实践实施提供建议。