Civil Engineering / İnşaat Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/13

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  • Article
    Sifonik Yağmur Suyu Drenaj Sistemi Tasarımı
    (Pamukkale Üniversitesi, 2019) Doğaroğlu, Bora; Yurdusev, Mehmet Ali
    Günümüzde yaygın olarak çatı yağmur suyu tahliyesi için geleneksel sistemler kullanılmaktadır. Son yıllarda, boruların tamamen dolu olarak çalışma prensibine dayalı olan sifonik drenaj sistemi kullanımı yaygınlaşmaktadır. Sifonik sistemdeki tam dolu akış prensibi ile gelenekselsisteme göre boru çapları azalmaktadır. Çok sayıda avantajlı özellikleri sayesinde özellikle sanayi ve ofis yapılarında bu sistem daha yaygın bir şekilde kullanılmaya başlamıştır. Bu çalışmada sifonik çatı yağmur suyu drenaj sistemi tasarımı örnek proje üzerinde değerlendirilmiştir. Aynı sistem geleneksel olarak da hesaplanmış ve sonuçlar maliyet açısından kıyaslanmıştır.
  • Article
    Citation - WoS: 1
    Lateral Torsional Buckling of Doubly Symmetric I-Shaped Steel Members Under Linear Moment Gradient
    (Pamukkale Üniversitesi, 2019) Uzun, Ertuğrul Türker; Seçer, Mutlu
    Due to technical developments and wider range of applications in the steel structures, significance of the research on structural stability problems become forward. Lateral torsional buckling is a major problem especially for doubly symmetric I-shaped steel members subjected to flexure about their strong axis. If these members are not appropriately braced against lateral deflection and twisting, they are under the risk of failure by lateral torsional buckling prior to the reach their load carrying capacity. In this study, elastic lateral torsional buckling behavior of doubly symmetric I-shaped steel members under linear moment gradient is investigated considering a proposed method, several design standards and codes, approaches from the literature and finite element analysis. Proposed method herein is based on finite difference solution of lateral torsional buckling differential equation considering linear moment gradient. Different unbraced member lengths and various end moment values are considered in order to compare and evaluate these approaches in terms of critical moment and moment modification factor. Analysis results show that lateral torsional buckling is a key issue for doubly symmetric I-shaped steel members that are under flexure and it is reflected satisfactorily with the proposed method considering the design codes and standards, approaches from the literature and finite element analysis results.
  • Article
    Citation - WoS: 31
    Citation - Scopus: 33
    Modification of Carbon Fibre/Epoxy Composites by Polyvinyl Alcohol (pva) Based Electrospun Nanofibres
    (Adcotec Ltd., 2016) Beylergil, Bertan; Tanoğlu, Metin; Aktaş, Engin
    In this study, the effects of modifying interlaminar region of unidirectional carbon fibre/epoxy composites by the incorporation of electrospun polyvinyl alcohol (PVA) nanofibres were investigated. PVA nanofibres were directly deposited onto the carbon fabrics by electrospinning method to improve mechanical performance of those composites. The features of the electrospun nanofibres were characterized by microscopy techniques. The unidirectional carbon fibre/epoxy composite laminates with/without PVA nanofibre interlayers were manufactured by vacuum-infusion technique in a [0]4 configuration. Tensile, three-point bending, compression, Charpy-impact and Mode-I fracture toughness tests (Double Cantilever Beam (DCB)) were carried out in accordance with ASTM standards to evaluate mechanical performance of the composites. Scanning electron microscopy (SEM) observations were made on the specimens to evaluate microstructural features. It was observed that the carbon fabrics were successfully coated with a thin layer of PVA nanofibres by electrospinning technique. The results showed that P VA nanofibres improve the mechanical properties of unidirectional carbon/epoxy composite laminates when subjected to in-plane loading. On the other hand, PVA nanofibres slightly reduced the mode-I fracture toughness values although they led to more stable crack propagation.