Retrofitting of unreinforced masonry structures and considerations for heritage-sensitive constructions. (15th May 2022)

• Record Type: Journal Article
• Authors: Yavartanoo, Fahimeh; Kang, Thomas H.-K.
• Is Part Of: Journal of building engineering. Volume 49(2022)
• Publication Date: 2022-05-15
• Subjects: Unreinforced masonry structures -- Historical buildings -- Retrofitting techniques -- Preservation -- Lateral load -- And seismic behavior; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2022.103993
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: Masonry is one of the oldest fundamental materials used in construction. Structures made by masonry materials without reinforcement, however, routinely exhibit poor performance when exposed to loads imposed by earthquakes, strong winds, shock and impact, and often fail in a brittle manner. The objective of reinforcing and strengthening un-reinforced masonry (URM) structures is to reduce their vulnerability to induced lateral loads and tension forces. Focus during the last few decades has been on seismic retrofitting and strengthening techniques using composite materials. This review attempts to systematically investigate URM structures and commonly used retrofitting methods based on type and previous studies. Furthermore, methods are categorized based on the nature of the structure, application, and possible availability. A comparison of each method's advantages and shortcomings is presented in terms of economy, sustainability, and buildability. Additionally, the application of these methods used for rehabilitation of historical URM buildings with more restrictions is introduced. Expectation is that this study would provide preliminary guidance to structural engineers, architects, and householders to which preservation of masonry structures may be achieved. Highlights: Retrofitting URM structures is thoroughly reviewed, with considerations for heritage-sensitive constructions. Types of failure mechanisms of URM structures and previous retrofitting methods are evaluated. Strengthening techniques, with a particular focus on structural and architectural factors, are compared. Critical features of each method, considering availability, cost, and buildability, are detailed. Restrictions associated with retrofitting historical URM structures are discussed.