Browsing by Author "Akgun, Yenal"

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A Novel Adaptive Façade Using Cable-Driven Compliant Mechanisms
(Elsevier, 2025) Neseliler, Pinar; Klamt, Marius; Akgun, Yenal; Blandini, Lucio
Adaptive fa & ccedil;ade systems have the potential to significantly reduce energy consumption and CO2 emissions while enhancing, among others, the thermal and lighting comfort of building occupants. However, most existing adaptive fa & ccedil;ades rely on rigid body mechanisms, which introduce mechanical complexity and increase maintenance costs. To address these challenges, bio-inspired compliant mechanisms, which use flexible elements capable of elastic deformation, offer a promising solution by eliminating the need for conventional hinges. However, studies in the literature show that while such systems often succeed in reducing the number of hinges, they do not typically achieve a reduction in the number of actuators. This study addresses the gap by combining cable networks with compliant mechanisms to minimize the number of actuators while proposing a holistic approach that integrates kinematic design, material selection, pattern development, structural analysis, and daylight performance evaluation. The study uses computer simulations to evaluate the system's kinematic characteristics, material properties, structural integrity, and daylight performance. The study explores fa & ccedil;ade patterns, cable networks, and actuation systems, alongside structural and environmental analyses, to develop an efficient and innovative adaptive fa & ccedil;ade system that simplifies mechanical design and enhances visual comfort.
Citation - WoS: 2
Citation - Scopus: 2
Proposal for a Kinetic Façade System Based on Curved Line Folding Technique
(Taylor & Francis Ltd, 2025) Neseliler, Pinar; Akgun, Yenal; Kavuncuoglu, Canberk
The use of kinetic building envelopes creates an important potential for reducing carbon emissions and electricity consumption. However, a number of existing kinetic fa & ccedil;ades are made up of rigid body mechanisms, which require multiple actuators to move. This limits their feasibility in the construction industry due to the large number of required actuators. To address this issue, the curved line folding (CLF) technique offers an alternative design method that relies on compliant mechanisms rather than rigid body hinges. By using flexible elements to allow for elastic deformation, CLF reduces the complexity and number of actuators required to initiate movement. On the other hand, cable-driven systems have not been explored to actuate the CLF mechanisms. This paper aims to investigate an innovative fa & ccedil;ade model that reduces the number of actuators and complexity while initiating the movement of the systems based on the CLF technique and cable bending system. In this paper, firstly, the existing literature is examined. Then, the proposed kinetic fa & ccedil;ade system, its geometric properties, and actuation is introduced. Finally, a daylight simulation of the proposed system is run in Rhinoceros with the use of ClimateStudio.