REINFORCEMENT OF MASONRY STRUCTURES USING INTERNAL MASONRY REINFORCEMENT SYSTEMS
DOI:
https://doi.org/10.36773/1818-1112-2025-137-2-23-29Keywords:
masonry, cracks, internal reinforcement, spiral rods, cellular concrete blocksAbstract
An analysis of the methods of repair and reinforcement by internal reinforcement systems of cracked masonry made of brick and natural stone is given. It is noted that the effectiveness of internal reinforcement of masonry depends on the values of the initial stresses acting in the structure. It is pointed out that the effectiveness of this method has not been sufficiently studied to strengthen masonry made of effective wall materials, in particular, masonry made of autoclave-hardened cellular concrete blocks, in which cracks often occur caused by shrinkage deformations of the masonry, as well as deflections of the supporting floors. Experimental studies of the effectiveness of strengthening a cracked stone wall made of cellular concrete blocks on thin-layer joints using an internal reinforcement system with spiral rods have been carried out. The studies were carried out on a model representing a closed steel frame with rigid joints filled with masonry made of cellular concrete blocks with a doorway. In the area above the opening of the masonry, the rods were installed "dry" by screwing into pilot holes that were drilled into the opening. In other filling areas, the rods were installed in grooves cut by a milling cutter with a depth of 50–80 mm, followed by their filling with a special polymer-cement mortar. It has been established that reinforcing masonry made of cellular concrete blocks with spiral rods is an effective means of increasing its stiffness and crack resistance. It is recommended to position the rods in the direction of the expected trajectories of the main tensile stresses. The values and trajectories of principal stresses are determined through structural analysis using finite element methods. Tests have shown low efficiency of mechanical connection of spiral rods "dry" with masonry made of cellular concrete blocks.
References
Malyszko, L. Konstrukcie murowe. Zarysowania I naprawy / L. Malyszko, R. Orlowicz. – Olsztyn : Wydawnictwo Uniwersytetu Warminsko-Mazurskiego, 2000. − 153 s.
Critical review of retrofitting and reinforcement techniques related to possibile failure // NIKER, New Integrated Knowledge Based Approaches To The Protection Of Cultural Heritage From Earthquake-Induced Risk. – Italy : Università di Padova, 2010. – P. 35−90.
Деркач, В. Н. Каменные и армокаменные конструкции. Оценка технического состояния, ремонт и усиление / В. Н. Деркач. – Минск : Строймедиапроект, 2021. − 255 с.
Деркач, В. Н. Актуальные вопросы применения ячеистобетонных кладочных изделий в жилищном строительстве / В. Н. Деркач // Архитектура и строительство. − 2020. − № 4. − С. 46–49.
Деркач, В. Н. Проблемы трещиностойкости стенового заполнения каркасных зданий из ячеистобетонных блоков / В. Н. Деркач, А. С. Горшков, Р. Б. Орлович // Строительные материалы. − 2019. − № 3. − С. 52–56.
Drobiec, Ł. Naprawy i wzmocnienia konstrukcji murowych / Ł. Drobiec // XXXVIII Ogólnopolska Konferencja Warsztat Pracy Projektanta Konstrukcji. – Wisla, 2024. – Tom 3. − S. 41−141.
Рекомендации по усилению каменных конструкций спиралевидными стержнями Sure Twist из аустенитной нержавеющей стали: Р 5.02168-2017. − Введ. 10.01.2017. – Минск : РУП Стройтехнорм, 2017. − 36 с.
Janowski, Z. Remonty i wzmacnianie murów oraz sklepień w obiektach zabytkowych / Z. Janowski // XIII Ogólnopolska Konferencja Warsztat Pracy Projektanta Konstrukcji, Ustroń 25–27 luty 1999 r. – Tom 1, cz. 1. – S. 223–252.
Stawiski, B. Konstrukcje murowe. Naprawy i wzmocnienia / B. Stawiski. – Warszawa : Polcen, 2014. − 320 s.
Piekarczyk, A. Uszkodzenia i naprawy niekonstrukcyjnych elementów budynków / A. Piekarczyk // XXX Jubileuszowe Ogolnopolskie Warstaty Pracy Projektanta Konstrukcji. – Szczyrk, 2015. – S. 233–290.
Drobiec, L. Investigation of efficiency stitch boss on capacity of cracked masonry wallets / L. Drobiec, R. Jasiński, J. Kubica // 12th International Brick / Block Masonry Conference, Madrid, Spain, 25–28 june 2000. – Vol. 3. – P. 953–970.
Drobiec, L. Strengthening of cracked compressed masonry using different types of reinforcement located in the bed joints / Ł. Drobiec, R. Jasiński, J. Kubica // ACEE Architecture, Civil Engineering, Environment. – 2008. – Vol. 1, Iss. 4. – P. 39–48.
Static cyclic in-plane shear response of damaged masonry walls retrofitted with NSM FRP strips – An experimental evaluation / K. M. C. Konthesingha, M. J. Masia, R. B. Peterse [et al.] // Engineering Structures. – 2013. – Vol. 50. – P. 126–136.
Ismail, N. In-situ and laboratory based out-of-plane testing of unreinforced clay brick masonry walls strengthened using near surface mounted twisted steel bars / N. Ismail, J. M. Ingham // Construction and Building Materials. – 2012. – Vol. 36. – P. 119–128.
Diagonal shear behaviour of unreinforced masonry wallettes strengthened using twisted steel bars / N. Ismail, R. B. Petersen, M. J. Masia, J. M. Ingham // Construction and Building Materials. – 2011. – Vol. 25. – P. 4386–4393.
Repair and investigation techniques for stone masonry walls / L. Binda, C. Modena, G. Baronio, S. Abbaneo // Construction and Building Materials. – 1997. – Vol. 11 (3). – P. 133–142.
Borri, A. Mur z kamienia łamanego wzmocniony za pomocą systemu „reticolatus”/ A. Borri, M. Corradi, E. Speranzini, A. Giannantoni // Journal of Heritage Conservation. – 2009. – Vol. 26. – P. 110–125.
A reinforced repointing grid for strengthening historic stone masonry walls / A. Borri, M. Corradi, E. Speranzini, A. Giannantoni // 8th International Masonry Conference 2010 in Dresden. – 2010. – S. 1851–1860.
Jasieńko, J. Conservation of the structure and materials of historic masonry walls / J. Jasieńko, Ł. Bednarz, D. Bajno // Key Engineering Materials. – 2015. – Vol. 624. – P. 354–362.
Paradiso, M. «Reticolatus»: An innovative reinforcement for irregular masonry. A numeric model / M. Paradiso, A. Borri, D. Sinicropi // Structures and Architecture: 2nd International Conference on Structure. – London : Taylor & Francis Group, 2013. – P. 841–848.
Borri, A. Un modello per lo studio del comportamento meccanico della muratura rinforzata con la tecnica del Reticolatus / A. Borri, M. Corradi, E. Speranzini // Conference: XIV Convegno Nazionale L’ingegneria Sismica in Italia – ANIDIS 2011. – 9 p.
Деркач, В. Н. Экспериментальные исследования влияния каменного заполнения на сдвиговую жесткость каркасов зданий / В. Н. Деркач, Р. Б. Орлович // Промышленное и гражданское строительство. − 2014. − № 11. − С. 53−57.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The work is provided under the terms of Creative Commons public license Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). This license allows an unlimited number of persons to reproduce and share the Licensed Material in all media and formats. Any use of the Licensed Material shall contain an identification of its Creator(s) and must be for non-commercial purposes only. Users may not prevent other individuals from taking any actions allowed by the license.
