ブックタイトル「煉瓦造建造物の保存と修復」英語版

概要

「煉瓦造建造物の保存と修復」英語版

Reinforcement of Roof Structures(slides 63-64) This is a case of a traditional wood framestructure of which different parts of the building werereinforced separately to support local loads.Reinforcement of Masonry Walls(slides 65-69) Lastly, I would like to introduce a case toexplain how the problem was challenged for raising thequality of the walls of a masonry structure to improvedurability. The numerous void spaces in stone masonrywere injected for reinforcement by improving the wall’smechanical behavior and performance. Also, by connectingthe two layers together horizontally, the mechanicalresponse could be dramatically improved. This is atraditional method, but have not been widely used. Becausebudget for restoration was limited at this household,measures for connecting the layers were left uncompleted.Prof. Eng. Claudio ModenaProf. Eng. Claudio ModenaInterventions - APPLICATIONSSM IngegneriaInterventions - RESEARCHSM IngegneriaInterventions on the roof structuresInterventions to strengthen the masonry wallsApplication of transversal elements and ties to walls research: stone masonry walldiatonoDucale Palace, Urbino? Improvement in the strength of the wall? Reduction of the dilatancy of the walls1.40? (MPa)1.20Muro 11T4020311.0000.800.60-20-7 -7-160.400.20? ( o / oo)0.00-15.0-10.0-5.00.05.010.015.0vertAorizzRvertBorizzAorizzBorizzL-40-58 -40-604X 6I1 1I2 8I2 2T 9T%original wall injection transversal tieslide 63slide 66Prof. Eng. Claudio ModenaProf. Eng. Claudio ModenaInterventions - APPLICATIONSSM IngegneriaInterventions - RESEARCHSM IngegneriaInterventions on the roof structuresArsenale, Venice, XII c.Interventions to strengthen the masonry wallsShaking table tests on Out-of-Plane behaviour of single structural elements? Failure mechanisms;? Variation of dynamic characteristics (frequencies, mode shapes);2727121227 2812283128171728172831312836363627,527,527,52929292929 29313131626 632626 3226 32slide 64262627,52527,52522 3422 3422 34778829 2929UnstrengthenedconditionStrengthenedusing tiesStrengthenedusing injectionStrengthened using tiesand injection0.25g 0.45g 0.60g 0.75gslide 67Prof. Eng. Claudio ModenaProf. Eng. Claudio ModenaInterventions to strengthen the masonry wallsInterventions - RESEARCHSM IngegneriaInsertion of tiesInterventions - APPLICATIONSSM IngegneriaInterventions aimed at increasing the masonry strength may be used to re-establish the originalmechanical properties lost because of material decay or to upgrade the masonry performance.Techniques used must employ materials with mechanical and chemical-physical properties similar to theoriginal materials.Interventions should be uniformly distributed (both strength and stiffness).With opportune cautiousness, suggested techniques are the“scuci-cuci”, noncement-based mortar grouting, mortar repointing, insertion of“diatoni”(masonryunits disposed in a orthogonal direction respect the wall’s plane) or small size tiebeams across the wall, with connective function between the wall’s leaves.Mortar repointingInjections technique:example of suitableexecution and ofproblems related touncorrected execution(e.g. lack of uniformity)slide 65slide 6860Chapter 5 Criteria and Techniques for Repairing and Strengthening Architectural Heritage: Research and Application