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    Cyclic loading tests of sub-standard RC frames retrofitted with buckling restrained braces and elastic steel frames
    (Architectural Institute of Japan, 2016) Fujishita, K.; Bal, A.; Sütçü, F.; Matsui, R.; Terashima, M.; Çelik, O.C.; Takeuchi, T.
    Strength and stiffness of panel and joint in non-diaphragm CHS-column to H-beam connection were experimentally investigated Herein, the panel means the cylindrical stub circumscribed by outer planes of the beam and the column, and the joint means the butt seam between the column wall and the beam end. Two types of specimen were tested: one is an X-shaped frame whose panel is subjected to shear, and the other is a 3-point bending specimen whose panel is free from shear. In result, the joint strength and stiffness are well predicted by the previously proposed formulae irrespective of the existence of shear in the panel, and the panel strength and stiffness are also well predicted by the well known formulae given for diaphragm connections. This suggests that the interaction between panel and joint of the non-diaphragm connection can be ignored in structural design.
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    The conservation of modern architectural heritage buildings in Turkey: İstanbul Hilton and İstanbul Çınar Hotel as a case study
    (Ain Shams University, 2022) Kopuz, Ayşe Durukan; Bal, A.
    This article contributes to the conservation of modern architectural heritage buildings by emphasizing the retrofitting of their construction systems. Modern architectural heritage buildings in Turkey are crucial in terms of transferring not only the cultural identity of the nations to further generations but also architectural sustainability of its distinguished period. By time, where these buildings can have constructional problems with its original structural systems, proposing a new system related with new earthquake regulations is inevitable in order to conserve them. Because most of the buildings are under threat of being demolished. The purpose of the research is to evaluate existing modern architectural heritage buildings in terms of its existing structural system and to develop a constructional model for renewal of them. As a case study, two hotel examples in İstanbul as a modern architectural heritage is selected, one is Hilton Hotel and the other is Çınar Hotel respectively. Then, the architectural plans and sections of the buildings as a data has been collected through literature survey by content analysis. At the end, the model proposal has been developed for each hotel buildings according to existing structural systems. The proposed models can be applied to sustain the life of the hotel buildings with a retrofitted structural system. So, the paper tries to conserve/protect the modern architectural heritage buildings by retrofitting its construction via presenting a remarkable study of two hotel buildings. © 2022 THE AUTHORS