Experimental verification of Hill’s model for wood

• Autorzy: Pełczyński Jan

Identyfikatory

DOI

10.24425/ace.2025.153347

Warianty tytułu

PL

Eksperymentalna weryfikacja modelu Hilla dla drewna

• Języki publikacji: EN

Abstrakty

EN

Structural elements made of wood, are finding more and more applications in construction. They are becoming increasingly popular again due to their ecological nature, as shown by the latest high-rise construction projects. The development of modern wooden structures is forcing designers to look for new solutions in workmanship. New technologies such as glued-laminated timber and cross-laminated timber are currently undergoing many analyses, such as verification for load-bearing capacity, stiffness, fire resistance, acoustics and life cycle assessment. The most popular at present is massive timber. Structures made with this technology consist mainly of cross-laminated and glued-laminated timber elements. Research on cross-laminated timber has mainly focused on its bending and shear strength or modeling approaches to estimate bending strength and failure mechanisms. From the point of view of high-rise construction, aspects of compression behaviors timber elements and their lateral performance are also relevant. In this study, a nonlinear material model based on Hill’s anisotropic plasticity potential was calibrated to determine the extent to which it is suitable for simulating simple experimental tests. To this end, experimental compression tests were carried out on wooden specimens at three different angles to the fiber direction. Data from the experiments were collected in parallel using two methods: reading the force and displacement of the machine head; and using the Aramis system to observe the surface of the specimen and determine the displacements using DIC. For comparison with numerical models, both displacement fields and force-displacement curves were averaged against individual samples using proprietary codes written in Python.

PL

Elementy konstrukcyjne wykonane z drewna znajdują coraz więcej zastosowań w budownictwie. Stają się one coraz bardziej popularne ze względu na swój ekologiczny charakter, czego dowodem są najnowsze projekty wieżowców. Rozwój nowoczesnych konstrukcji drewnianych zmusza projektantów do poszukiwania nowych rozwiązań w wykonawstwie. Nowe technologie, takie jak drewno klejone warstwowo i drewno klejone krzyżowo, są obecnie poddawane wielu analizom, takim jak weryfikacja pod kątem nośności, sztywności, odporności ogniowej, akustyki i oceny cyklu życia. Najpopularniejsze obecnie jest drewno masywne. Konstrukcje wykonane w tej technologii składają się głównie z elementów z drewna klejonego krzyżowo i warstwowo. Badania nad drewnem klejonym krzyżowo koncentrowały się głównie na jego wytrzymałości na zginanie i ścinanie lub podejściach do modelowania w celu oszacowania wytrzymałości na zginanie i mechanizmów uszkodzeń. Z punktu widzenia konstrukcji wieżowców istotne są również aspekty zachowania elementów drewnianych podczas ściskania i ich właściwości boczne. W tym badaniu skalibrowano nieliniowy model materiałowy oparty na anizotropowym potencjale plastyczności Hilla, aby określić, w jakim stopniu nadaje się on do symulacji prostych testów eksperymentalnych. W tym celu przeprowadzono eksperymentalne testy ściskania na drewnianych próbkach pod trzema różnymi kątami w stosunku do kierunku włókien. Dane z eksperymentów były zbierane równolegle przy użyciu dwóch metod: odczytu siły i przemieszczenia głowicy maszyny; oraz przy użyciu systemu Aramis do obserwacji powierzchni próbki i określania przemieszczeń za pomocą DIC. W celu porównania z modelami numerycznymi, zarówno pola przemieszczeń, jak i krzywe siła-przemieszczenie zostały uśrednione dla poszczególnych próbek przy użyciu autorskich kodów napisanych w języku Python.

Słowa kluczowe

EN

digital image correlation; finite element method; glued laminated timber; laboratory test

PL

cyfrowa korelacja obrazu; metoda elementów skończonych; drewno klejone warstwowo; badanie laboratoryjne

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2025
• Tom: Vol. 71, nr 1
• Strony: 507--521
• Opis fizyczny: Bibliogr. 26 poz., il., tab.

Twórcy

autor

Pełczyński Jan

• Warsaw University of Technology, Faculty of Civil Engineering, Warsaw, Poland

• https://orcid.org/0000-0002-6983-8480

Bibliografia

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