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

It is important to intervene in stages. For example,by confirming the connective element in a wall prior toimprovement work, higher safety can definitely be achievedwithout calculations. I’d like to stress on reversibility,maintenance and management, possibilities of repair, andstrength. If modeling is to be adopted, the application of onlyone model is insufficient. There are various models suchas dynamic model, finite element model, and mathematicalmodel, which have been adjusted for use with mainlycontemporary construction materials. Therefore, they cannotbe directly applied onto historic masonry structures whichinvolve complicated material characteristics.Once the building’s quality as a masonry structure has beenassured, it is essential that equilibrium can be maintained,for which forces that affect equilibrium, rather than stressstrengths, need to be focused on.The most important step in the complicated designingprocess for invention on a historic structure is the“knowledgephase”in which knowledge and information are gathered.Properties that meet the actual condition of the buildingneed to be understood. It is necessary to understand howeach of them relates to one another. The aim of this methodis to remove local weaknesses that are relevant in the partialquality and connective elements in masonry structures, ratherthan to alter the building’s structural response. Before makinginterventions, please make sure to consider the buildings’geometric, physical, as well as mechanical properties, as muchas possible.Planning of Surveys(slide 22-23) Next, I’d like to explain the importance ofplanning surveys. Recent interventions on historic structuresin Italy have been developed based on our experiences fromthe past few centuries. Each of the additions onto buildings issupported by different technologies. However, when viewedas a whole, there are those that are not fully integrated as astructure. Such examples question us on methods to take forconfirming material characteristics as well as the treatmentof models.There are many methods for surveying includingvisual surveys, surveys involving partial dismantlement,confirmation of joints and cracks in masonry structures,as well as for determining structural response. The type ofmasonry technique may differ by area in one building andtherefore, the category and quality need to be carefullyobserved. If they were constructed at different times,Prof. Eng. Claudio ModenaSM IngegneriaINVESTIGATION PLAN1. HYPOTHESYS ON THE BUILDING EVOLUTION2. IDENTIFICATION OF PLAN-ELEVATION CHARACTERISTICSProf. Eng. Claudio ModenaDepartment of Civil, Environmental and Architectural EngineeringUniversity of Padova, ItalyLimit analysis for seismic assessmentThe infill material is exclusively considered as applied mass, consistently with the construction practiceof railway masonry bridges, and the eventual lateral stiffening effect of spandrel walls is not taken intoaccount, because of frequent lack of effective connection. Both hypotheses are conservative (Clementeand Raithel 1998, da Porto et al. 2007), hence suitable for large-scale simplified analyses.3. INTERPRETATION OF CRACK AND DEFORMATION PATTERNS4. IDENTIFICATION AND CHARACTERIZATION OF CONSTRUCTION DETAILS/ELEMENTS5. MASONRY TIPOLOGY6. MATERIALS CHARACTERIZATION7. MONITORING STRATEGIESslide 22Iterative solution for funicolarpolygon and thrust lineslide 24Prof. Eng. Claudio ModenaSM IngegneriaProf. Eng. Claudio ModenaDepartment of Civil, Environmental and Architectural EngineeringUniversity of Padova, ItalySimplified vulnerability assessmentIso-acceleration curves obtained with kinematic analysis and tabular procedure ofPreliminary seismic verificationcracksCracksTiltingdata-loggercracksA-L mechanismAA-L mechanismExtensimetersHeavy masses monitoringPiezometersAP-L mechanismAP-T mechanismslide 23slide 2552Chapter 5 Criteria and Techniques for Repairing and Strengthening Architectural Heritage: Research and Application