Developments in rehabilitation and consolidation of historical concrete and masonry constructions

摘要

Development and use of structural consolidation and strengthening techniques must be based on the true nature and stress-strain behaviour of the concrete and masonry material, as well as on the understanding of the load distribution and deformation mechanisms acting in such structures. Safety, reliability and risk are key issues in rehabilitation as well as in the preservation of the built, cultural environment. Powerful methods are becoming available for the calculation of structural safety values, and they allow to calculate the global probability of failure of complex structures. These methods need appropriate analysis models as input, as well as reliable design models for strengthening of structural elements by means of externally bonded steel plates or fibre reinforced laminates, or design models for the effect of grouting on strength and stiffness of ancient brick or block masonry. Such models are derived from research, which combines investigation and development of new materials, non-destructive testing, laboratory and site investigation. This global approach, as it is practiced in the Reyntjens Laboratory of K.U. Leuven, and applied in rehabilitation and restoration projects by Triconsult n.v., are presented and documented with case-studies.