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Projects / Programmes source: ARIS

Reduction of seismic vulnerability of historic masonry buildings by application of CFRP strips and seismic isolation

Research activity

Code Science Field Subfield
2.01.00  Engineering sciences and technologies  Civil engineering   

Code Science Field
T220  Technological sciences  Civil engineering, hydraulic engineering, offshore technology, soil mechanics 
Keywords
masonry buildings, cultural heritage, earthquake, strengtthening, CFRP laminates, seismic isolation, shaking table, model
Evaluation (rules)
source: COBISS
Researchers (9)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  20631  PhD Uroš Bohinc  Civil engineering  Researcher  2008 - 2011  110 
2.  04259  Branko Cerut  Civil engineering  Technical associate  2008  56 
3.  24339  PhD Matija Gams  Civil engineering  Researcher  2009 - 2011  204 
4.  14870  PhD Iztok Klemenc  Civil engineering  Researcher  2008  224 
5.  21593  PhD Stanislav Lenart  Civil engineering  Researcher  2009 - 2011  227 
6.  05697  MSc Marjanca Lutman  Civil engineering  Technical associate  2008 - 2011  481 
7.  06018  Ljubo Petkovič  Civil engineering  Technical associate  2008 - 2011  64 
8.  00654  PhD Miha Tomaževič  Civil engineering  Head  2008 - 2011  743 
9.  10328  MSc Polona Weiss  Civil engineering  Researcher  2008 - 2011  154 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  1502  Slovenian National Building and Civil Engineering Institute  Ljubljana  5866324000  10,361 
Abstract
In the past 30 years when attentiona has been also paid to seismic issues of protection of cultural heritage buildings, a variety of methods for strengthening the existing masonry structures have been developed as a result of experimental research and earthquake damage observation, which are economical and simple for execution and efficient during earthquakes as well. However, as a result of development of new materials, new technologies to be applied to existing masonry buildings have been proposed. Two directions are followed: on the one hand, modern carbon (CFRP) or glass fiber (GFRP) reinforced polymer laminates are used for strengthening masonry structures, on the other, however, the existing structure is separated from the impact of earthquake ground motion by seismic isolation. The latter matter is especially acceptable in the case where the requirements for the protection of cultural heritage do not permit significant interventions in the existing structural system. Experimental research already indicated the possibility of application of carbon or glass fiber reinforced polymer laminates. However, although general observations are promising, the problems of technological solution to ensure common action of two extremely different materials, bond and anchorage, are yet to solved. Seismic isolation has been already applied to new (Chile, China) and few important historic masonry buildings (U.S.A.), however, without much experimental evidence of success. Witnih the framework of the proposed research project, a contribution will be given to answering the questions. On the basis of results of experiments, the recommendations and guidelines for practical application of these methods will be prepared and instructions for numerical verification of efficiency of such methods will be prepared. Last but not least, technological problems to be resolved before broader application of these methods, will be pointed out Hints for further research will be given.
Significance for science
Results of research have made clear the mechanisms of action and partly confirmed the efficiency of contemporary technological solutions for seismic retrofit and upgrading of existing masonry structures, including cultural monuments. It is believed that the results of experimental research provided a good basis for the development of mathematical models for the assessment of seismic resistance of masonry structures, strengthened by composite reinforced coatings. It is also believed that the understanding of mechanisms of behaviour of strengthened masonry walls under cyclic loading will lead to the development of technologies, which will reduce the observed deficiencies and improve both, resistance and deformability capacity of the strengthened masonry walls. It is expected that the results of research will have considerable impact on decision makers, responsible for seismic rehabilitation of existing building stock and architectural cultural heritage, and will represent a step forward in efforts of taking care for the reduction of seismic risk. Not many experimental data of this kind are available in the literature. As has been already seen, the results of these experiments, providing evidence as regards the efficiency of application of such technological solutions in the conditions of seismic loading, already attained good response in international community.
Significance for the country
In many cities in rearthquake-prone regions, systematic seismic rehabilitation of existing and heritage masonry buildings has not yet been carried out. Although the traditional strengthening techniques, developed after the earthquakes in the last three decades, proved to be efficient, their application requires that the residents be temporarily moved out of the buildings. In this regard, up-to-date techniques using new materials are less disturbing. Moreover, they are becoming also economically acceptable. However, their efficiency, especially when appliled to masonry, has not yet been thorouoghly investigated. It is expected that in this regard, the research results will represent an important contribution to the knowledge data bank and will make possible wider use of such technologies for seismic rehabilitation of existing buildings, after the deficiencies of such methods, indicated within the framework of this research project, will be remedied and technologies improved. The contents of research are harmonized with the development policy of the country. The contents are also harmonized with several thematic priorities, including preservation of cultural heritage as well as reserach and use of new materials and technologies. The research combines the protection of cultural heritage against natural disasters with the development of new materials and technologies. It is believed that the results of research will make possible the co-financing organization to broaden the supply of products and technologies for strengthening of masonry buildings. It is also believed that the knowledge acquired during this project will provide a good basis for the improvement of existing technologies and development of new materials, which will improve both, resistance and deformability capacity of composite strengthened masonry.
Most important scientific results Annual report 2008, 2009, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2008, 2009, final report, complete report on dLib.si
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