Analiza naprezanja i deformacija pri savijanju kompozitnih nosača

undergraduate thesis

• Title (english): Analysis of stress and strain due to bending of composite beams
• Author: Zvonimir Šantek
• Mentor: Ivan Duvnjak (mentor)
• Committee member: Marko Bartolac (predsjednik povjerenstva)
• Committee member: Ivan Duvnjak (član povjerenstva)
• Committee member: Marina Frančić Smrkić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Engineering Mechanics); Zagreb
• Defense date and country: 2021-09-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering

Abstract

U ovom završnom radu obrađena je tema analize naprezanja i deformacija pri savijanju kompozitnih nosača. Na početku su dane općenite teorijske postavke pri savijanju ravnih štapova, diferencijalne odnosi pri savijanju i objašnjene vrste savijanja. Objašnjeno je detaljnije čisto savijanje i savijanje silama. Objašnjeni su kompozitni nosači, te uloga pojedinog materijala u kompozitnom nosaču, izvedeni izrazi za naprezanje, deformacije, te zakrivljenost nosača. Obrađeni su primjeri kompozitnih nosača: križno lamelirano drvo, ferocementni armirano- betonski kompozit, aluminij ojačan elementima od čelika. Izveden je izraz za neutralnu os kompozitnih nosača. Objašnjeni su postupci određivanja naprezanja kompozitnih nosača direktnom metodom i metodom redukcije poprečnih presjeka. Riješeni su primjeri zadataka direktnom metodom, metodom redukcije poprečnog presjeka, te ojačanje betona armaturnim šipkama.

Abstract (english)

In this paper, the topic of stress and strain analysis during bending of composite beams is discussed. First, general theoretical assumptions in bending of straight rods, differential relations in bending and types of bending are given. Pure bending and general case of bending are explained in more detail. Composite beams and the role of individual material in a composite beam are explained, the expressions for stress, deformation, and curvature of beams are derived. Examples of composite beams are processed: cross-laminated wood, ferrocement reinforced concrete composite, aluminum reinforced with steel elements. An expression for the neutral axis of composite beams is derived. Procedures for determining the stress of composite beams by the direct method and the cross-section reduction method are explained. Examples of tasks with the direct method, the method of cross-section reduction and the example of concrete reinforcement with reinforcing bars were solved.

• Keywords: savijanje; kompozitni nosač; naprezanje; deformacije
• Keywords (english): bending; composite beam; stress; strain
• Language: croatian
• URN:NBN: urn:nbn:hr:237:731019
• Study programme: Title: Civil Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2022-10-18 08:11:09