Design of bending-active structures and selection of the proper solid wood type

Muhammed Emin Akyürek; Zehra Canan Girgin

Makale detayları

Design of bending-active structures and selection of the proper solid wood type

Yazarlar:

Muhammed Emin Akyürek | Zehra Canan Girgin

Yayıncı:

Gazi University

Ana Başlıklar:

Mühendislik | Mimarlık

Dergi:

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2421-2434

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001287696

pISSN:

1300-1884

Anahtar kelimeler:

Özet:

 Bending-active design is an approach based on bending and then fixing initially planar beams or shell parts within elastic displacement limits; gridshells, which stand out with their light, flexible and organic properties, are produced with this approach. In the production under consideration, material losses also occur in bending due to some missing criteria and limited experimental studies on the bending of the structural member. In this study, it is focused on the applicability of wooden gridshells in Turkiye. First, the sizing and detailing knowledge of worldwide applications were determined, and then the characteristics of the native wood types were investigated. In this scope, the tree species and proper wood types in Turkiye for this process were studied through detailed data analysis. From the current literature, the physical and mechanical characteristics of native wood species in Turkiye were tabulated. The radii of curvature not available in the national literature were calculated and the relationships of the parameters among the density, flexural strength, modulus of elasticity, cost, production quantity parameters were investigated. This research is the first study in the literature on the applicability of gridshell structures in Turkiye to classify tree species and to determine and evaluate suitable wood types with analytical methods. From the evaluations, beech, larch and oak, which are common in our country and have higher flexural strength compared to their examples in Europe; it was concluded that the most proper tree species in terms of supply, strength, and bendability for gridshell production. It is predicted that the results of the analysis will encourage the wood sector for the construction of this type structural systems.

 Bending-active design is an approach based on bending and then fixing initially planar beams or shell parts within elastic displacement limits; gridshells, which stand out with their light, flexible and organic properties, are produced with this approach. In the production under consideration, material losses also occur in bending due to some missing criteria and limited experimental studies on the bending of the structural member. In this study, it is focused on the applicability of wooden gridshells in Turkiye. First, the sizing and detailing knowledge of worldwide applications were determined, and then the characteristics of the native wood types were investigated. In this scope, the tree species and proper wood types in Turkiye for this process were studied through detailed data analysis. From the current literature, the physical and mechanical characteristics of native wood species in Turkiye were tabulated. The radii of curvature not available in the national literature were calculated and the relationships of the parameters among the density, flexural strength, modulus of elasticity, cost, production quantity parameters were investigated. This research is the first study in the literature on the applicability of gridshell structures in Turkiye to classify tree species and to determine and evaluate suitable wood types with analytical methods. From the evaluations, beech, larch and oak, which are common in our country and have higher flexural strength compared to their examples in Europe; it was concluded that the most proper tree species in terms of supply, strength, and bendability for gridshell production. It is predicted that the results of the analysis will encourage the wood sector for the construction of this type structural systems.

 Bending-active design is an approach based on bending and then fixing initially planar beams or shell parts within elastic displacement limits; gridshells, which stand out with their light, flexible and organic properties, are produced with this approach. In the production under consideration, material losses also occur in bending due to some missing criteria and limited experimental studies on the bending of the structural member. In this study, it is focused on the applicability of wooden gridshells in Turkiye. First, the sizing and detailing knowledge of worldwide applications were determined, and then the characteristics of the native wood types were investigated. In this scope, the tree species and proper wood types in Turkiye for this process were studied through detailed data analysis. From the current literature, the physical and mechanical characteristics of native wood species in Turkiye were tabulated. The radii of curvature not available in the national literature were calculated and the relationships of the parameters among the density, flexural strength, modulus of elasticity, cost, production quantity parameters were investigated. This research is the first study in the literature on the applicability of gridshell structures in Turkiye to classify tree species and to determine and evaluate suitable wood types with analytical methods. From the evaluations, beech, larch and oak, which are common in our country and have higher flexural strength compared to their examples in Europe; it was concluded that the most proper tree species in terms of supply, strength, and bendability for gridshell production. It is predicted that the results of the analysis will encourage the wood sector for the construction of this type structural systems.

 Eğilme-etkin tasarım, başlangıçta düzlemsel olan kirişler veya kabuk parçalarının elastik yerdeğiştirme sınırları içerisinde eğilip mesnetlenmesi esaslı bir yaklaşımdır; hafif, esnek ve organik olma özellikleri ile öne çıkan ahşap ızgara kabuklar bu yaklaşım ile üretilir. Taşıyıcı elemanın eğilebilmesine yönelik ölçütler ve deneysel çalışmaların oldukça sınırlı olması nedeniyle eğilme işleminde malzeme kayıpları da sözkonusudur. Bu çalışmada, ahşap ızgara kabukların Türkiyede uygulanabilirliğine odaklanılmıştır. Öncelikle bu konuda dünyadaki uygulamaların boyut ve detay bilgileri belirlenmiş, takiben yerli ağaç odunu karakteristikleri incelenmiştir. Bu kapsamda, Türkiyede yetişen bazı ağaç odunlarının fiziksel ve mekanik karakteristikleri tablolaştırılmış, hangi ağaç odunlarının bu işleme uygun olduğu detaylı veri analizi ile araştırılmıştır. Yerli literatürde bulunmayan eğrilik yarıçapları hesaplanarak; yoğunluk, eğilme dayanımı, elastisite modülü, maliyet, üretim miktarı parametreleri ile ilişkisi belirlenmiştir. Bu araştırma; ızgara kabuk yapıların Türkiyede uygulanabilirliğinin araştırılması, ağaç türlerinin sınıflandırılarak uygun olanların analitik yöntemler ile belirlenmesi ve değerlendirilmesi bakımından literatürdeki ilk çalışmadır. Değerlendirmelerden, ülkemizde yaygın olan ve Avrupadaki örneklerine göre de eğilme dayanımı daha nitelikli olan kayın, karaçam ve meşenin; ızgara kabuk üretimi için tedarik, dayanım ve eğilebilirlik yönünden en uygun ağaçlar olduğu sonucuna varılmıştır. Analiz sonuçlarının bu yapıların inşası konusunda ahşap endüstrisini teşvik edeceği öngörülmektedir.

Makale detayları

Design of bending-active structures and selection of the proper solid wood type

Yazarlar:

Muhammed Emin Akyürek | Zehra Canan Girgin

Yayıncı:

Gazi University

Ana Başlıklar:

Mühendislik | Mimarlık

Dergi:

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2421-2434

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001287696

pISSN:

1300-1884

elastic structures

timber gridshell

Turkiye woods

material selection

radius of curvatureesnek yapılar

ahşap ızgara kabuk

Türkiye ağaç odunları

malzeme seçimi

eğrilik yarıçapı

Sayı

Makale detayları

Yazarlar: Muhammed Emin Akyürek | Zehra Canan Girgin

Yayıncı: Gazi University

Ana Başlıklar: Mühendislik | Mimarlık

Dergi: Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2421-2434

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001287696

pISSN: 1300-1884

Sayı

Yazarlar:

Muhammed Emin Akyürek | Zehra Canan Girgin

Yayıncı:

Gazi University

Ana Başlıklar:

Mühendislik | Mimarlık

Dergi:

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2421-2434

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001287696

pISSN:

1300-1884