ABSTRACT

The shear properties of unreinforced masonry are key parameters used in order to understand the behaviour of these structures under horizontal actions. These characteristics are usually determined using Destructive Testing (DT) methods. However, this typology of tests is not always suitable due to both their high impact and cost. The present work aims to design, analyze and apply an innovative Minor Destructive Testing (MDT) technique for the determination of the shear mechanical properties. To limit the impact on the structure, the Flat Jack (FJ) technique was adopted. The geometrical configuration, chosen among six different layouts, was studied in order to comprehend the role-played by different parameters and to have then a mathematical model representative of the stresses inside of the sample. Finally, four in situ tests were executed and are analyzed and discussed.

摘要

无钢筋砌体的剪切特性是用于了解这些结构在水平作用下的行为的关键参数。这些特性通常使用破坏性测试 ( DT ) 方法确定。然而，由于其高影响和成本，这种测试类型并不总是合适的。目前的工作旨在设计、分析和应用一种创新的轻微破坏性测试 ( MDT ) 技术来确定剪切力学性能。为了限制对结构的影响，Flat Jack ( FJ) 技术。研究了从六种不同布局中选择的几何配置，以了解不同参数所扮演的角色，然后获得代表样品内部应力的数学模型。最后，进行了四次原位试验并进行了分析和讨论。