wi&e Wood Industry and Engineering 2687-6043 2687-6035 Karadeniz Teknik Üniversitesi Wood Physics and Mechanics Wooden Buildings and Constructions Ahşap Fiziği ve Mekaniği Ahşap Yapılar ve Konstrüksiyonları Farklı Direnç Sınıflarındaki Kerestelerin Bazı Mekanik Özelliklerinin Tahribatlı ve Tahribatsız Yöntemlerle Belirlenmesi Determination of Some Mechanical Properties of Timber of Different Strength Classes By Non-Destructive And Destructive Methods https://orcid.org/0000-0003-3273-3615 Birinci Abdullah Uğur KARADENIZ TECHNICAL UNIVERSITY, FACULTY OF FOREST, DEPARTMENT OF FORESTRY INDUSTRIAL ENGINEERING https://orcid.org/0000-0002-5422-7556 Öztürk Hasan KARADENIZ TECHNICAL UNIVERSITY https://orcid.org/0000-0003-2503-8470 Demirkır Cenk KARADENIZ TECHNICAL UNIVERSITY 06 25 2025 7 1 11 22 11 23 2024 04 17 2025 Copyright © 2017, Wood Industry and Engineering 2017 Wood Industry and Engineering

Geleneksel tahribatlı testler, inşaat kerestesinin mekanik özelliklerini belirlemek için kullanılır. Bu testlerden doğru sonuçlar elde edilmesine rağmen, malzemeye zarar verir ve kullanılamaz hale getirir. Sonuç olarak, test edilen malzeme tekrar kullanılamaz ve ekonomik kayıplara neden olur. Ayrıca, tahribatlı yöntemler testleri gerçekleştirmek için bir laboratuvar altyapısı gerektirir ve yerinde değerlendirme sağlamaz. Tahribatlı testlerin bu dezavantajları nedeniyle tahribatsız test yöntemleri ortaya çıkmıştır. Tahribatsız testler, malzemeye hiç veya çok az zarar vererek maliyet kaybını önler, yerinde test olanağı sağlar ve malzemenin tekrar kullanılmasını sağlar. Buna dayanarak, bu çalışmada farklı direnç sınıflarındaki kerestelerin teknolojik özelliklerini tahribatsız ve tahribatlı testlerle belirlemek amaçlanmıştır. Bu amaçla keresteler üzerinde tahribatsız vida çekme direnci, makaslama modülü, yoğunluk, eğilme direnci ve elastikiyet modülü testleri yapılmıştır. Bu tahribatsız testlerle bir regresyon eğrisi oluşturmak için yoğunluk, eğilme direnci ve elastikiyet modülü testleri de tahribatlı olarak yapılmıştır. Yapılan testler sonucunda elde edilen veriler kullanılarak oldukça yüksek doğrulukta bir regresyon eğrisi elde edilmiştir.

Traditional destructive testing is used to determine the mechanical properties of construction timber. Although accurate results are obtained from these tests, they damage the material and render it unusable. As a result, the tested material cannot be reused, resulting in economic losses. In addition, destructive methods require a laboratory infrastructure to perform the tests and do not provide on-site evaluation. Due to these disadvantages of destructive testing, non-destructive testing methods have emerged. Non-destructive testing prevents cost loss by causing no or very little damage to the material, providing on-site testing and enabling the material to be reused. Based on this, this study aims to determine the technological properties of timbers of different resistance classes by non-destructive and destructive tests. For this purpose, non-destructive screw withdrawal force, shear modulus, density, bending strength and modulus of elasticity tests were performed on the timbers. In order to create a regression curve with these destructive tests, density, bending strength and modulus of elasticity tests were also performed destructively. A highly accurate regression curve was found using the data obtained as a result of the tests.

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