Title
Predlog novog rešenja za sprezanje čelika i unakrsno lameliranog drveta primenom ojačanih moždanika
Creator
Milić, Miloš 1992
CONOR:
73676809
Copyright date
2023
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 07.05.2024
Other responsibilities
Academic Expertise
Tehničko-tehnološke nauke
University
Univerzitet u Nišu
Faculty
Građevinsko-arhitektonski fakultet
Group
Katedra za materijale i konstrukcije
Alternative title
Proposal of a new solution for composite action of steel and cross-laminated timber using reinforced dowels
Publisher
[M. J. Milić]
Format
XXVIII, 178 listova
description
Bibliografija: list 167-177.
Biografija autora: list 178.
description
Metal and timber structures
Steel-timber composite structures
Abstract (en)
The subject of the dissertation is a proposition of the new solution for composite action of steel profiles and cross-laminated timber (CLT) using reinforced dowels. Reinforcing of the dowels has been achieved by installing an element made of steel sheet, into a previously prepared groove in the CLT panel. By using the reinforcing element, pressures of the bolt shaft onto the timber have been reduced, wherewith the timber crushing in the vicinity of the bolt hole has been decreased, too. Based on the analysis of stress distribution around the bolt hole, it has been defined that the reinforcing element has to take the shape of a circular segment. That way, an element simple for fabrication and installation has been obtained. Characteristics of the reinforced and unreinforced dowels, as well as the degree of reinforcing, have been determined by experimental analysis, applying an innovative asymmetric push-out test with lateral support of the immovable part of the specimen. Within the experimental analysis, all material characteristics are needed for defining the parameters of the numerical model. A numerical analysis of the proposed solution has been conducted by applying the Finite Element Method (FEM). Within the numerical analysis, a new material model for timber has been developed, and it was applied for modelling of the CLT panels. The new material model for timber has been based on a hybrid approach in material modelling, and consists of line and surface finite elements. Based on the results of the experimental and numerical analysis, a comparison of the proposed solution for dowels with unreinforced dowels and with existing solutions from literature has been done through discussion, regarding the stiffness and strength characteristics. It has been concluded that the proposed solution of the reinforced dowel was more favourable for realizing the composite action of steel and CLT panels compared to the existing solutions.
Authors Key words
moždanik, čelik, unakrsno lamelirano drvo, eksperimentalno ispitivanje, tod konačnih elemenata
Authors Key words
composite connection, steel, cross-laminated timber, experimental test, finite element method
Classification
[691.11:691.714]:691.88(043.3)
691:620.1:519.673(043.3)
Subject
Т220
Type
Tekst
Abstract (en)
The subject of the dissertation is a proposition of the new solution for composite action of steel profiles and cross-laminated timber (CLT) using reinforced dowels. Reinforcing of the dowels has been achieved by installing an element made of steel sheet, into a previously prepared groove in the CLT panel. By using the reinforcing element, pressures of the bolt shaft onto the timber have been reduced, wherewith the timber crushing in the vicinity of the bolt hole has been decreased, too. Based on the analysis of stress distribution around the bolt hole, it has been defined that the reinforcing element has to take the shape of a circular segment. That way, an element simple for fabrication and installation has been obtained. Characteristics of the reinforced and unreinforced dowels, as well as the degree of reinforcing, have been determined by experimental analysis, applying an innovative asymmetric push-out test with lateral support of the immovable part of the specimen. Within the experimental analysis, all material characteristics are needed for defining the parameters of the numerical model. A numerical analysis of the proposed solution has been conducted by applying the Finite Element Method (FEM). Within the numerical analysis, a new material model for timber has been developed, and it was applied for modelling of the CLT panels. The new material model for timber has been based on a hybrid approach in material modelling, and consists of line and surface finite elements. Based on the results of the experimental and numerical analysis, a comparison of the proposed solution for dowels with unreinforced dowels and with existing solutions from literature has been done through discussion, regarding the stiffness and strength characteristics. It has been concluded that the proposed solution of the reinforced dowel was more favourable for realizing the composite action of steel and CLT panels compared to the existing solutions.
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