Strengthening of Arched Masonry Structures by Additional Reinforcement: Design Approaches and Comparison to Experiments

Abstract

The primary aim of this article is to present design approaches for calculating the additional strengthening of masonry arches with the use of the Strut-and-Tie model and applicable standards and their comparison to the experiments. Experiments have proven the functionality of the described method of strengthening by additional inserted non-prestressed reinforcement from the face of the vault. The presented method is one of the methods of maintaining historical vaulted masonry structures, and is also used to improve the behaviour of newly designed masonry structures. This method of strengthening has its advantages, especially in the minimization of alterations to the structure and its simplicity of application. To compare the results and verify the vaults behaviour, experiments were performed with using a metallic helical reinforcement and non-metallic composite glass reinforcement. These experiments have demonstrated the significant influence of additional reinforcement on the carrying capacity of masonry vaults. The growth of bearing capacity was more than eight-fold. From a comparison of design approaches to experiments is evident that approaches to the design of additionally strengthened masonry based on valid standards are possible. The comparison of results moreover demonstrates the possibility of using approaches based on the Strut-and-Tie model.

Nonlinear soil deformability effects on the seismic damage mechanisms of brick and stone masonry arch bridges

“…In recent years, structural performances of masonry arch bridges under static and dynamic loads have been widely investigated in literature to understand the reasons of existing damage conditions and provide necessary intervention plans. The recently published studies related to masonry arch bridges can be summarized on the subjects of strengthening, experimental, numerical and analytical investigations as follows: i) strengthening investigations (Alecci et al, 2016a(Alecci et al, , 2016b(Alecci et al, , 2017Basilio et al, 2015;Bati and Rovero, 2008;Bayraktar and H€ okelekli, 2020;Behnamfar and Afshari, 2013;Bergamo et al, 2014;Bertolesi et al, 2017;Borri et al, 2009Borri et al, , 2011Carozzi et al, 2018;Chen, 2002;Chiozzi et al, 2017;Daryadel and Cunningham, 2016;D'Ambrisi et al, 2013aD'Ambrisi et al, , 2013bD'Ambrisi et al, , 2015Rabinovitch, 2009, 2010;Erdogmus and Boothby, 2004;Garmendia et al, 2014;Islami et al, 2012;Mahdikhani et al, 2016;Misseri et al, 2019;Mittal and Vutukuru, 2017;Modena et al, 2015;Oliveira et al, 2010;Panto`et al, 2017;Pintucchi and Zani, 2016;Tao et al, 2011;Zampieri et al, 2018a;Zhao et al, 2014;Zla´mal and St epa´nek, 2018), ii) experimental investigations (Acikgoz et al, 2018a(Acikgoz et al, , 2018bAltunis¸ik et al, 2011Altunis¸ik ...…”