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

altered. For use as offices, the series of columns and thevaulted ceiling inside had been removed and during theSecond World War, dormer windows and ventilation towerson the roof were taken down to contribute metal elementsfor war use. Also, in order to prevent further damage duringair raids, the plastered ceiling was removed. Therefore,in the early restoration plan, the following reinforcementwas planned having judged that restoration to the originalinteriors at the time of construction would be difficult (figure7-2) fn 41 .1 Because the east wall was particularly weak structurally,steel-frame horizontal trusses will be installed in betweenthe roof structure and the ceiling of the side alleys,between the east and west brick walls and the side rowsof columns.2 The rows of columns on the sides will be changed tosteel-frame to be supported by a concrete foundation.3 Reinforced concrete walls will be newly installed in thenorth and south gable walls.4 Steel-frame horizontal trusses will be introduced into thesouth wing where there were the reception room androoms for the chair and vice-chair, as well as in the areaabove the assembly hall rostrum.5 Cracks in brick walls will be injected with epoxy resinand bound together with clamp-shaped steel rods withinthe cracks.would be lost, including the shortening of a portionof the original building members close to the wall.? Details leading to changes in the reinforcement planAs full-fledged surveys were progressed with large areasof the structure disassembled for restoration, it became clearthat although greatly altered, it retained much of the originalbuilding members (photo 7-3). Elements removed earlyon were found beneath the floor and there was sufficientinformation to restore the hall back to the state when itwas first completed. Therefore, the reinforcement plan wasagain studied and revised to restore the original interiors, toreinforce the building on the outside with buttresses fn 42 .? The altered reinforcement planIn designing the buttress, the following points wereparticularly paid attention to fn 43 .1 Reinforcement should be reversible.2 Reinforcement members should be made of materialsother than those used in the building itself so that theycan be distinguished as newly introduced elements.3 Reinforcement members to appear on the outside shouldbe attached to the building with a connection of minimumscale that would not disturb the design of the building.4 Reinforcement members should be simple and unadornedand not interfere with the design of the building.In this proposed method, although the structuralreinforcement members were to be installed in areas hiddenfrom view, it also had other problems that needed to besolved, as will be explained below.1 The ceiling would be lowered by a few tens of centimetersin order to introduce steel-frame horizontal trussesbetween the walls and column rows, which would largelyaffect the interior space.2 The side columns needed to be altered into steel frames.3 Because reinforced concrete walls would be newlyinstalled in both gable walls, the interior finishesphoto 7-3 East side of the Assembly Hall during dismantlement.（photo provided by：Professor Emeritus, Tsutomu Kimura of Nagaoka Instituteof Design）figure 7-4 Design review process for buttress reinforcement(Reference：重要文化財山形県旧県庁舎及び県会議事堂保存修理工事報告書1旧県会議事堂編）110Chapter 6A Collection of Case Studies of Preservation and Restoration of Brick Masonry Structures