Korkmaz, Koray
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Korkmaz, K
Korkmaz, K.
Korkmaz, K.
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koraykorkmaz@iyte.edu.tr
Main Affiliation
02.02. Department of Architecture
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Current Staff
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Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
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3GOOD HEALTH AND WELL-BEING
0
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4QUALITY EDUCATION
9
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5GENDER EQUALITY
0
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6CLEAN WATER AND SANITATION
0
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7AFFORDABLE AND CLEAN ENERGY
4
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8DECENT WORK AND ECONOMIC GROWTH
5
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
18
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10REDUCED INEQUALITIES
0
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11SUSTAINABLE CITIES AND COMMUNITIES
3
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
5
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13CLIMATE ACTION
3
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14LIFE BELOW WATER
0
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15LIFE ON LAND
2
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
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17PARTNERSHIPS FOR THE GOALS
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Documents
29
Citations
435
h-index
10
Documents
23
Citations
326
Scholarly Output
58
Articles
22
Views / Downloads
144371/36773
Supervised MSc Theses
13
Supervised PhD Theses
10
WoS Citation Count
320
Scopus Citation Count
435
Patents
0
Projects
4
WoS Citations per Publication
5.52
Scopus Citations per Publication
7.50
Open Access Source
42
Supervised Theses
23
| Journal | Count |
|---|---|
| Journal of the International Association for Shell and Spatial Structures | 5 |
| International Journal of Computational Methods and Experimental Measurements | 2 |
| International Journal of Space Structures | 2 |
| Computers and Concrete | 2 |
| Structures and architecture: Concepts, applications and challenges | 2 |
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58 results
Scholarly Output Search Results
Now showing 1 - 10 of 58
Master Thesis A Research on a Reconfigurable Hypar Structure for Architectural Applications(Izmir Institute of Technology, 2013) Susam, Gözde; Korkmaz, Koray; Korkmaz, KorayKinetic design strategy is a way to obtain remarkable applications in architecture. These kinetic designs can offer more advantages compared to conventional ones. Basic knowledge of different disciplines is necessary to generate kinetic designs. In other words, interdisciplinary studies are critical. Therefore, architect's knowledge must be wide-ranging in order to increase novel design approaches and applications. The resulting rich hybrid products increase the potential of the disciplines individually. Research on kinetic structures shows that the majority of kinetic structures are deployable. However, deployable structures can only be transformed from a closed compact configuration to a predetermined expanded form. The motivation of the present dissertation is generating a novel 2 DOF 8R reconfigurable structure which can meet different hyperbolic paraboloid surfaces for architectural applications. In order to obtain this novel structure; the integration between the mechanism science and architecture is essential. The term reconfigurable will be used in the present dissertation to describe deployable structures with various configurations. The novel reconfigurable design utilizes the overconstrained Bennett linkage and the production principals of ruled surfaces. The dissertation begins with a brief summary of deployable structures to show their shortcomings and their lack of form flexibility. Afterward, curved surfaces, basic terms in mechanisms and overconstrained mechanisms were investigated. Finally, a proposed novel mechanism which is inspired from the basic design principles of Bennett linkage and the fundamentals of ruled surfaces are explained with the help of kinematic diagrams and models.Article Citation - WoS: 75Citation - Scopus: 95A Review of Planar Scissor Structural Mechanisms: Geometric Principles and Design Methods(Taylor and Francis Ltd., 2011) Maden, Feray; Korkmaz, Koray; Akgün, YenalThis study deals with a review of planar scissor structural mechanisms (SSMs) and reports on how they can be easily transformed from a stowed to a deployed configuration. These mechanisms have an important transformation capacity of their extension and rotation properties, and many examples have been proposed that vary in size, type and geometry. Although there are many studies dealing with designing new planar or spatial SSMs and their calculation methods, there is no systematic study demonstrating the basic typologies, geometric principles, design rules and constraints of such SSMs. Further, current calculation methods are based on the inductive approach in which the dimension of one scissor unit (SU) is given, but the span of the whole structure is found later according to the number of SUs that are used to assemble the structure. However, this approach is not convenient for architectural applications, because it requires a deductive approach in which the dimensions and required number of SUs are calculated according to defined span length. On the basis of this concept, this article, first, analyses the geometric design of SSMs systematically in terms of their possible configurations and then develops trigonometric calculation methods for different types of SSMs, using a deductive approach.Conference Object Design of Adaptive Shading Device with Rigid Origami Technique: Improving Outdoor Thermal Comfort on Pathways of University Campus(Institute of Physics, 2025) Dağlier, Y.; Ekici, B.; Korkmaz, K.Since urbanization emerged with consequences for the built environment, shadows have played a key role in outdoor comfort. In hot climates, shadow has become a vital element in public spaces as it significantly affects social interaction on various occasions, such as university campus areas. The current state of the art shows that the role of shadings in outdoor environments is crucial to increasing pedestrian comfort and supporting overall well-being. While trees and canopies are commonly used for shading, their applicability is sometimes limited in pedestrian pathways. For example, the Izmir Institute of Technology (IZTECH) campus copes with outdoor discomfort during the extremely hot summer days. Due to the changing environmental conditions, static shading devices offer effective shadows only at specific times. This creates a necessity to design shading devices that can rotate and fold to mitigate temperatures more effectively and increase outdoor thermal comfort. A parametric shading model was developed using Grasshopper and Kangaroo Physics®, and its effectiveness was analyzed using Building Performance Simulation (BPS) tools. The research integrates heuristic optimization techniques to enhance shading performance, including Galapagos (Genetic Algorithm) and Opossum (RBF-opt and CMA-ES). Results indicate that the proposed kinetic shading devices reduced the universal thermal climate index (UTCI) by approximately 20% during peak sunlight hours. These findings suggest that adaptive shading strategies efficiently improve outdoor thermal comfort in urban public spaces. © 2025 Published under licence by IOP Publishing Ltd.Article Citation - WoS: 16Citation - Scopus: 17Design of a 2-Dof 8r Linkage for Transformable Hypar Structure(Taylor and Francis Ltd., 2012) Korkmaz, Koray; Akgün, Yenal; Maden, FerayDouble curved geometries including hyperbolicparaboloids (hypars) have become a trend in contemporary architecture. However, most of the constructed architectural examples of the hypars are static and cannot offer any form variability. In this paper, a 2-DOF 8R linkage mechanism is introduced to buildtransformable hypar structures. It is inspired from the basic design principles of Bennett linkage. By its distinctive connection details and additional links, this novel mechanism can change its form fromplanar geometries to various hypars. The paper begins with the brief summary of the applications of hypar structures in architecture. Secondly, main principles and deficiencies of the Bennett linkage are presented. According to these deficiencies, structural synthesis of the novel mechanism is considered. Finally, advantages and potential uses of the proposed novel mechanism are explained. © 2012 Copyright Taylor and Francis Group, LLC.Doctoral Thesis Design and Analysis of Deployable Reciprocal Frames(Izmir Institute of Technology, 2022) Özen, Gülçin; Korkmaz, Koray; Korkmaz, KorayA reciprocal frame (RF) is a type of structure used since early times. It consists of mutually supporting bars that can span large distances greater than the length of the bar. Although there are deficiencies in previous studies, there are movable RFs, but we cannot talk about the existence of a 3-dimensional deployable RF network. This study aims to contribute to the missing knowledge for movable RF fans and develop a deployable RF network. The study has conducted a comprehensive literature review to gain knowledge and identify the deficiencies of RFs. There are many studies about RFs, but it has been observed that very limited research has been done on movable RFs, and some geometric properties have not been made yet. Firstly, missing geometric knowledge has been found, which are the positions and orientations of the joints by using Denavit-Hartenberg parameters. Also, the effect of engagement length on the fan height and base edge is analyzed. A reconfigurable demountable RF fan is created with the obtained geometric knowledge. Then, mobility calculations are made, and kinematic diagrams are drawn for zero, single, and multi degrees of freedom (DoF) triangular, quadrilateral, and pentagonal fans. Their motions are investigated, and 3-dimensional (3d) simulations are generated. A two DoF quadrilateral fan with prismatic and revolute joints is produced. Then the possibilities of assembling the two DoF fans are searched to create a deployable RF network. While the network has a single DoF in the direction of vault curvature, it has multi DoF in the thickness direction. The network takes the form of a roll in its most closed state, and it takes the form of a vault in its most open state. The section of the curvature of the deployable network is the same as the Da Vinci bridge. However, while simple joints were used in the Da Vinci Bridge, revolute and prismatic joints are used in the proposed deployable RF network.Doctoral Thesis Novel design methodologies for transfeormable doubly-ruled surface structures(Izmir Institute of Technology, 2015) Maden, Feray; Korkmaz, Koray; Korkmaz, KorayToday architecture seeks for adaptable spaces ever than before to meet the changing functional, spatial or environmental needs. Thus, it necessitates developing adaptive structures that are capable of geometric transformations. For this purpose, a series of kinetic structures has been developed. The most impressive examples of these structures are deployable and transformable bar structures that have the ability to change their shapes from one configuration to another. Although many innovative designs have been proposed for these structures, only a few have been constructed at full-scale due to their complex mechanical systems and limited configurations in which they can carry loads. Moreover, most of the proposed structures are restricted to certain geometric forms such as singly-curved vaults or doubly-curved synclastic domes. Doubly-curved anticlastic structures have been rarely used despite their resistance to loads through their curvatures and ease of constructing their surfaces by ruled surface generation method. The primary objective of this dissertation is to propose novel methodologies to design deployable and transformable doubly-ruled surface structures by using novel structural mechanisms (SMs) which provide morphologically flexible, mechanically simple, structurally effective and architecturally viable solutions. For this purpose, a systematic procedure is developed which comprises geometric design, structural synthesis and structural design phases. First, the geometric properties of the doubly-ruled surfaces are thoroughly analyzed and their morphologies are investigated based on the generated parametric models. Second, novel SMs are constructed by means of structural synthesis in which transformation capabilities of the proposed SMs are discussed in detail. Finally, several case studies are proposed for the architectural applications of those SMs and a set of structural analyses is carried out at different configurations of the proposed structures to discuss their structural behavior under typical loading patterns. “Simulation and modeling” has been used as the main research method in the study which covers all mathematical models and computer simulations.Master Thesis The Use of Origami-Based Kinetic Facade Component To Improve Daylight Performance in Terms of Leed Criteria: a Case of Iztech Innovation Center(Izmir Institute of Technology, 2020) Yasinci, Zihni; Korkmaz, Koray; Korkmaz, KorayNovel solutions in sustainable design due to advancing technology are increased besides bringing new problems. One major problem is originated with the usage of fully-glazed surfaces on the building facade without any justification. Fully-glazed facades may lead to higher energy consumption and visual discomfort. In such office buildings where most of the working time is in the daytime, this situation causes a decreasing in employees' performance and high energy usage. Kinetic facades have emerged as a design solution to control daylight efficiency. Such adaptive elements with varying geometry and material can be applied to the facade according to the form, orientation, location of the building and the climate of the region. Therefore, the number of such studies must be increased. In this study, a determined part of the origami pattern (chicken wire) that consists of seven joints and six panels with a single degree of freedom as a spherical mechanism for the kinetic facade component was used. The aim is to increase daylight efficiency with three-dimensional shape changes in this kinetic facade in terms of LEED daylight criteria. IZTECH Innovation Center is modelled in Revit apply scenarios including variations of timeline, kinetic facade component's opening angles and material type. The performance of the kinetic facade is evaluated according to illuminance and sDA values calculated. As a result, a direct correlation between the customization of facade elements according to sunlight and daylight usage was observed. Findings provided us a guidance on how to apply the kinetic facade elements according to daylight.Article Citation - WoS: 3Geometric and Kinematic Analysis of Deployable Doubly Ruled Hyperboloids(Yıldız Teknik Üniversitesi, 2017) Maden, Feray; Korkmaz, KorayThis paper aims to develop deployable doubly ruled hyperboloid surfaces that can be used in architectural applications. First, the study systematically analyzes the geometric principles of hyperboloids generated by the ruled surface generation method and examines the morphology to generate different types of hyperboloids. Then, a method is introduced to construct deployable doubly ruled hyperboloid surfaces. The study demonstrates that deployment behavior of the hyperboloid is directly related to joint types used at the intersection points of the bars. Based on kinematic analysis, the study establishes that deployable hyperboloids with a single degree of freedom can be constructed only by revolute and spherical joints. Finally, various hyperboloids having different number of intersections are constructed according to the proposed joint types and their deployment capabilities are discussed.Article Citation - WoS: 3Citation - Scopus: 3Çok Fonksiyonlu Form Değiştirebilir Köprü Tasarımı için İki Serbestlikli Strüktürel Mekanizma Önerisi(Gazi Üniversitesi, 2017) Gür, Şebnem; Yar, Müjde; Korkmaz, KorayHareketli köprüler ilk zamanlar korunma ihtiyacı ile tasarlanmıştır. Modern zamanlarda ise ulaşımıkolaylaştırmak için geliştirilmeye devam edilmektedir. Sabit köprülerin aksine farklı kullanım senaryolarınıdesteklemeleri sebebiyle tercih edilmektedirler. Bu yazıda mevcut hareketli köprüler kinematik özellikleriaçısından tanıtılmış, hangi kullanım seneryolarını destekledikleri ve eksik kaldıkları yönler açıklanmıştır.Daha sonra güncel bir örnek olan Rolling Bridge'de kullanılmış strüktürel mekanizmanın tasarım prensiplerden yararlanarak, tüm kullanım senaryolarını destekleyen form değiştirebilen köprü için çokdevreli ve iki serbestlikli yeni bir strüktürel mekanizma önerilmiştir. Son olarak mekanizmanın pozisyonanalizi yapılarak Microsoft Excel® ortamında gerçekleştirilen grafik sunulmuşturMaster Thesis Biçim Değiştirebilir Bir Karşılıklı Çerçeve Yapısının Tasarımı(2025) Helvacı, İpek; Korkmaz, Koray; Özen, GülçinKarşılıklı çerçeveler, her elemanın komşu eleman üzerine yerleştiği ve bu organizasyonun oluşturduğu kapalı döngü sayesinde kendi kendini taşıyabilen yapısal sistemlerdir. Genellikle geçici yapılarda yaygın olarak kullanılmakta olup, ilkel barınaklara kadar uzanan bir geçmişe sahiptir. Karşılıklı çerçeve sistemlerinin en büyük avantajı, nispeten kısa elemanlar kullanılarak geniş açıklıkların geçilebilmesidir. Geleneksel karşılıklı çerçeve yapıları Asya'dan Avrupa'ya dünyanın birçok yerinde yaygın olarak görülse de, mimari uygulamalarda hareketli karşılıklı çerçeve sistemlerine ilişkin literatürde çok az örnek bulunmaktadır. Bu çalışma, farklı çokgen planlarla uyumlu olan bir hareketli çatı mekanizmasını geliştirmektedir. Mekanizma, montaj sırasında geometrik adaptasyon sağlamak amacıyla üç serbestlik derecesine sahip fan birimleri olarak tasarlanmıştır. Mekanizma, temelini bir karşılıklı çerçeve yapısından alarak kare, beşgen, altıgen ve sekizgen planlara uyarlanabilir. Karşılıklı çerçeve konfigürasyonlarında birer devre kapatılarak mekanizmanın eşzamanlı hareketini sağlayan tek serbestlik dereceli yapılar elde edilmiştir. Kinematik analizler, mekanizmanın farklı düzenlerdeki adaptasyon ve performansını göstermektedir. Sistem bağlantılarındaki karmaşıklıkları aşmak için 3 boyutlu baskı ile bir fiziksel model üretilmiştir. Bu çalışma, karşılıklı çerçevelerin yapısal davranışını yöneten ilkeleri uygulayarak dönüştürülebilir sistemlerin geliştirilmesine katkıda bulunmaktadır.