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Keywords: mining tremors, building structures, masonry structures, strengthening of masonry buildings, carbon fibre reinforced polymer..

Summary

In the Legnica-Glogów Copperfield, Poland and the Upper Silesian Coal Basin mining rockbursts excite tremors characterized by energies running to 1E10 J and surface vibrations which reach an intensity of 0.3g (where g is the acceleration of gravity). Mining exploitation is mainly carried out under urbanized and heavily populated areas so the problem of mining related surface vibrations is particularly important. Therefore the problem of hazard evaluation of mining tremors is important. Masonry buildings constitute the largest portion of residential development in above mentioned areas. In these areas, mining tremors generate surface vibrations acting on surface structures. The first part of the study, reported in this paper, refers to the dynamic models of the selected real-detached three-storey masonry building. The dynamic analysis used a verified dynamic model of the structure and the most intensive surface mining-related vibrations. Mining-related vibrations were recorded at seismic stations in the mining area. The second part of the paper takes into account the nonlinear behaviour of the brick wall. The study presents also the results of nonlinear analyzes of the proposed strengthening of masonry buildings. The proposed reinforcement consists of carbon fibre reinforced polymer wraps attached to masonry walls. The calculations were performed with the use of the finite element software MSC Marc for the two models of masonry buildings considered. The effectiveness of the proposed strengthening was made by comparing the reaction without reinforcement and with reinforcement. The basis for this evaluation was a comparison of the calculated maximal values of principal stress and shear strain angle in the models analyzed. Strengthening reduces the maximum values of principal stress in the masonry walls, and the maximum shear strain angles.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 244 The Use of Composite Reinforcement in Masonry Buildings subjected to Mining Shock T.Z. Tatara and F. Pachla Cracow University of Technology, Poland doi:10.4203/ccp.106.244 purchase the full-text of this paper Full Bibliographic Reference for this paper T.Z. Tatara, F. Pachla, "The Use of Composite Reinforcement in Masonry Buildings subjected to Mining Shock", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 244, 2014. doi:10.4203/ccp.106.244 Keywords: mining tremors, building structures, masonry structures, strengthening of masonry buildings, carbon fibre reinforced polymer.. Summary In the Legnica-Glogów Copperfield, Poland and the Upper Silesian Coal Basin mining rockbursts excite tremors characterized by energies running to 1E10 J and surface vibrations which reach an intensity of 0.3g (where g is the acceleration of gravity). Mining exploitation is mainly carried out under urbanized and heavily populated areas so the problem of mining related surface vibrations is particularly important. Therefore the problem of hazard evaluation of mining tremors is important. Masonry buildings constitute the largest portion of residential development in above mentioned areas. In these areas, mining tremors generate surface vibrations acting on surface structures. The first part of the study, reported in this paper, refers to the dynamic models of the selected real-detached three-storey masonry building. The dynamic analysis used a verified dynamic model of the structure and the most intensive surface mining-related vibrations. Mining-related vibrations were recorded at seismic stations in the mining area. The second part of the paper takes into account the nonlinear behaviour of the brick wall. The study presents also the results of nonlinear analyzes of the proposed strengthening of masonry buildings. The proposed reinforcement consists of carbon fibre reinforced polymer wraps attached to masonry walls. The calculations were performed with the use of the finite element software MSC Marc for the two models of masonry buildings considered. The effectiveness of the proposed strengthening was made by comparing the reaction without reinforcement and with reinforcement. The basis for this evaluation was a comparison of the calculated maximal values of principal stress and shear strain angle in the models analyzed. Strengthening reduces the maximum values of principal stress in the masonry walls, and the maximum shear strain angles. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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