Yazar "Korkmaz, Hasan H." seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    Betonarme Kolonların Davranışına Etken Olan Tasarım Değişkenleri Üzerine Analitik Bir İnceleme
    (2001) Kaltakcı, M. Yaşar; Korkmaz, Hasan H.; Korkmaz, S. Zerrin
    Bu çalışmada betonarme kolonların moment-eğrilik ilişkilerine etken olan tasarım değişkenleri üzerine analitik bir inceleme amaçlanmış ve bu amaçla bir bilgisayar programı geliştirilmiştir. Betonarme kolonların davranışına etki eden beton basınç dayanımı, donatı çeliği akma dayanımı, boyuna donatı ve sargı donatısı miktarı ve donatıdaki pekleşme olayının betonarme kolonlar üzerindeki etkisi araştırılmıştır. Geliştirilen bilgisayar programı, kabuk betonun ezilmesi, donatıda pekleşmeyi, göbek betonu için sargı donatısı etkisini ve gerçekçi matematiksel malzeme modellerini göz önüne alabilen ve "katmanlı-modelleme" tekniğini kullanarak çözüm yapabilen FORTRAN dilinde yazılmış bir programdır (Parviz vd., 1981).
  • Küçük Resim Yok
    Öğe
    Seismic improvement of infilled nonductile RC frames with external mesh reinforcement and plaster composite
    (TECHNO-PRESS, 2015) Kamanli, Mehmet; Korkmaz, Hasan H.; Unal, Alptug; Balik, Fatih S.; Bahadir, Fatih; Cogurcu, Mustafa T.
    The objective of this paper is to report the result of an experimental program conducted on the strengthening of nonductile RC frames by using external mesh reinforcement and plaster application. The main objective was to test an alternative strengthening technique for reinforced concrete buildings, which could be applied with minimum disturbance to the occupants. Generic specimen is two floors and one bay RC frame in 1/2 scales. The basic aim of tested strengthening techniques is to upgrade strength, ductility and stiffness of the member and/or the structural system. Six specimens, two of which were reference specimens and the remaining four of which had deficient steel detailing and poor concrete quality were strengthened and tested in an experimental program under cyclic loading. The parameters of the experimental study are mesh reinforcement ratio and plaster thickness of the infilled wall. The effects of the mesh reinforced plaster application for strengthening on behavior, strength, stiffness, failure mode and ductility of the specimens were investigated. Premature and unexpected failure mode has been observed at first and second specimens failed due to inadequate plaster thickness. Also third strengthened specimen failed due to inadequate lap splice of the external mesh reinforcement. The last modified specimen behaved satisfactorily with higher ultimate load carrying capacity. Externally reinforced infill wall composites improve seismic behavior by increasing lateral strength, lateral stiffness, and energy dissipation capacity of reinforced concrete buildings, and limit both structural and nonstructural damages caused by earthquakes.
  • Küçük Resim Yok
    Öğe
    Seismic upgrading of reinforced concrete frames with steel plate shear walls
    (TECHNO-PRESS, 2017) Korkmaz, Hasan H.; Ecemis, Ali S.
    The objective of this paper is to report on a study of the use of unstiffened thin steel plate shear walls (SPSWs) for the seismic performance improvement of reinforced concrete frames with deficient lateral rigidity. The behaviour of reinforced concrete frames during seismic activities was rehabilitated with an alternative and occupant-friendly retrofitting scheme. The study involved tests of eight 1/3 scale, one bay, two storey test specimens under cyclic quasi-static lateral loadings. The first specimen, tested in previous test program, was a reference specimen, and in seven other specimens, steel infill plates were used to replace the conventional infill brick or the concrete panels. The identification of the load-deformation characteristics, the determination of the level of improvement in the overall strength, and the elastic post-buckling stiffness were the main issues investigated during the quasi-static test program. With the introduction of the SPSWs, it was observed that the strength, stiffness and energy absorption capacities were significantly improved. It was also observed that the experimental hysteresis curves were stable, and the composite systems showed excellent energy dissipation capacities due to the formation of a diagonal tension field action along with a diagonal compression buckling of the infill plates.