Partially grouted masonry walls: experimental response & ANN/FEA analysis models

部分灌浆砖石墙：实验响应

• 批准号: 514260-2017
• 负责人: CruzNoguez, Carlos
• 金额: $ 0.76万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719349
• 关键词: Partially; grouted; masonry; walls; experimental

Reinforced masonry (RM) shear walls are often used as the primary load-resisting system against lateral loads in low- and medium-rise masonry structures. RM walls can be fully grouted (FG) or partially grouted (PG) with the latter option being generally more economical, and thus, widely used in the masonry industry. While expected to remain sufficiently stiff under service loads, a masonry shear wall is expected to exhibit a ductile response under lateral load at the ultimate state. However, if the behaviour is shear-critical, failure may occur suddenly and lead to catastrophic loss of life and property. Recent studies have shown that current design provisions do not predict the shear strength of PG shear walls with consistent accuracy over the range of design variables commonly found in practice. Research has shown that in some cases, design provisions may lead to potentially unsafe designs. To develop safe, accurate, and robust design methods for the shear and flexural strength of PG walls, the Canadian Concrete Masonry Producers Association (CCMPA) and Canada Masonry Design Centre (CMDC) are not-for-profit industry associations representing the national technical interests of masonry contractors and block manufacturers, respectively, are interested in undertaking an analytical and experimental program in collaboration with the University of Alberta. Analysis models for the structural response of masonry PG walls will be developed using results from experimental testing, finite-element (FE) modelling, artificial neural networks (ANN), and mechanics-based strength formulations. The analysis model will permit an improved understanding of the mechanics underlying the behaviour of PG walls. The experimental tests will allow to examine the influence of critical design variables, calibrate the analysis models, and advance the existing knowledge on the structural response of PG walls. The rational design methods for PG walls developed in this research project will benefit the masonry industry and contractors by allowing the construction of safer and more economic PG walls.

加筋砌体 (RM) 剪力墙通常用作中低层砌体结构中抵抗横向荷载的主要抗荷系统。 RM 墙可以完全灌浆 (FG) 或部分灌浆 (PG)，后一种选择通常更经济，因此广泛应用于砖石行业。 虽然期望在使用荷载下保持足够的刚度，但砌体剪力墙预计在最终状态下在横向荷载下表现出延性响应。 然而，如果行为是剪切临界的，则可能会突然发生故障并导致灾难性的生命和财产损失。 最近的研究表明，当前的设计规定并不能在实践中常见的设计变量范围内以一致的精度预测 PG 剪力墙的抗剪强度。 研究表明，在某些情况下，设计规定可能会导致潜在的不安全设计。为了开发安全、准确和稳健的 PG 墙抗剪和抗弯强度设计方法，加拿大混凝土砌体生产商协会 (CCMPA) 和加拿大砌体设计中心 (CMDC) 是代表国家技术利益的非营利行业协会的砖石承包商和砌块制造商分别有兴趣与阿尔伯塔大学合作开展分析和实验项目。 将利用实验测试、有限元 (FE) 建模、人工神经网络 (ANN) 和基于力学的强度公式的结果来开发砖石 PG 墙的结构响应分析模型。 该分析模型将有助于更好地理解 PG 墙行为背后的力学。 实验测试将能够检查关键设计变量的影响，校准分析模型，并推进有关 PG 墙结构响应的现有知识。 本研究项目中开发的 PG 墙的合理设计方法将使砌体行业和承包商受益，从而可以建造更安全、更经济的 PG 墙。