Scaling unreinforced masonry structures with hollow-core clay bricks for laboratory testing
For a shake table test on a four-storey structure with both unreinforced hollow-core brick masonry (URM) walls and reinforced concrete (RC) walls, the test unit had to be constructed at half-scale. While past experience showed that testing RC structural elements at reduced scale leads to similar results as full-scale tests, a literature review on tests of scaled masonry revealed that scaling of masonry was more challenging. For instance, several researchers reported that the scaled masonry was stronger but less stiff than the full-scale masonry. However, previous work concentrated on the scaling of solid clay material and not all conclusions can be translated directly to masonry with modern hollow-core clay bricks. As a preparation to the shake table test, an extensive test program on full- and half-scale hollow-core brick masonry was conducted. This paper presents results of material tests that were conducted to develop a half-scale masonry that matched the full-scale masonry best. Our results are compared to previous investigations and the differences between scaling of masonry with solid and hollow-core bricks are discussed.