Tube-Jack Testing for Irregular Masonry Walls: Regular Masonry Wall Testing
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This paper presents the continued development of a novel non-destructive testing method termed tube-jack testing. The goal of the tube-jack system is to provide an enhanced and less destructive method than traditional flat-jack testing for determination of mechanical characteristics and local stress states in irregular masonry walls. Single tube-jack tests were performed, using previously developed rubber tube-jacks, in regular masonry walls of granite and cement-lime mortar. A traditional flat-jack test was also performed in the same masonry wall. Conclusions suggest that tube-jacks are successful in applying pressure to the masonry at low stress states.
KeywordsTube-jack testing Flat-jack testing NDTs Unreinforced masonry Experimental testing
The authors would like to acknowledge the Fundação para a Ciência e Tecnologia, which supported this research work as a part of the Project “Improved and innovative techniques for the diagnosis and monitoring of historical masonry”, PTDC/ECM/104045/2008.
- 2.RILEM Recommendation MDT.D.4: In-Situ Stress Tests Based on the Flat-Jack (2004)Google Scholar
- 4.Binda, L., Tiraboschi, C.: Flat-jack test as a slightly destructive technique for the diagnosis of brick and stone masonry structures. Int. J. Restor. Build. Monum. 5, 449–472 (1999)Google Scholar
- 5.ASTM: Standard Test Method for In Situ Compressive Stress within Solid Unit Masonry, Estimated Using Flat-jack Measurements, ASTM Standard C 1196-04 (2004)Google Scholar
- 7.Manning, E., Ramos, L., Fernandes, F., Sousa, C., Azenha, M.: Tube-Jack testing for irregular masonry: preliminary testing. In: 8th International Conference on Structural Analysis of Historical Constructions, Wroclaw, Poland (2012)Google Scholar
- 8.Hearn, E.J.: Ch. 10: thick cylinders. In: Mechanics of Materials 1: An Introduction to the Mechanics of Elastic and Plastic Deformation of Solids and Structural Materials, 3rd edn, pp. 215–253. Butterworth-Heinemann, Woburn, MA (1997)Google Scholar
- 9.EN 1052-1: Methods of Test for Masonry—Part 1: Determination of Compressive Strength (1999)Google Scholar
- 10.Manning, E., Ramos, L.F., Fernandes, F.: Direct sonic and ultrasonic wave velocity in masonry under compressive stress. In: 9th International Masonry Conference, Guimaraes, Portugal (2014)Google Scholar
- 11.ASTM: Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers–Tension, ASTM Standard D412 (1998)Google Scholar