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

部分灌浆砌体墙：实验响应

• 批准号: 514260-2017
• 负责人: CruzNoguez, Carlos
• 金额: $ 5.68万
• 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: 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=648360
• 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.

配筋砌体剪力墙是中低层砌体结构中主要的抗侧力体系。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，因此广泛用于砌体行业。 虽然预期在使用荷载下保持足够的刚度，但预期砌体剪力墙在极限状态下在侧向荷载下表现出延性响应。 然而，如果行为是剪切临界的，故障可能突然发生，并导致灾难性的生命和财产损失。 最近的研究表明，目前的设计规定不能预测PG剪力墙的剪切强度与一致的精度在设计变量的范围内，通常在实践中发现。 研究表明，在某些情况下，设计规定可能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）是非营利性行业协会，分别代表砌体承包商和砌块制造商的国家技术利益，有兴趣与阿尔伯塔大学合作开展一项分析和实验计划。 砌体PG墙的结构响应的分析模型将开发使用实验测试，有限元（FE）建模，人工神经网络（ANN）和力学为基础的强度公式的结果。 分析模型将允许更好地了解PG墙的行为背后的力学。 实验测试将允许检查关键设计变量的影响，校准分析模型，并推进现有的知识对PG墙的结构响应。 在本研究项目中开发的PG墙的合理设计方法将有利于砌体行业和承包商，允许更安全，更经济的PG墙的建设。