Optimalno dimenzioniranje armiranobetonskega konzolnega nosilca spremenljive višine : diplomska naloga št.: 451/B-GR

Jedlovčnik, Rok (author), Saje, Drago (mentor)

V okviru svoje diplomske naloge sem preučil in opisal postopke za dimenzioniranje armiranobetonskega (AB) nosilca spremenljive višine, ki je konzolno vpet. Ti postopki so v skladu s standardom za dimenzioniranje AB konstrukcij SIST EN 1992-1-1. Nosilec, ki sem ga obravnaval, ima pravokotni prečni prerez, ki je obremenjen z enoosnim upogibnim momentom. Uporabljena materiala sta beton, ki je najpogosteje uporabljen material v gradbeništvu in jeklo za armiranje. Osredotočil sem se na določanje vzdolžne in strižne armature ter na razpoke in pomike nosilca. Izdelal sem računalniški pripomoček, ki uporabniku omogoča, da vnese specifične podatke o nosilcu in obtežbi ter nato samostojno izračuna optimalne rešitve z vidika stroškovne učinkovitosti elementa. Pripomoček je bil zasnovan tako, da se avtomatično spreminjata trdnostni razred betona in višina na podprtem robu elementa. Kriterij optimalnosti je najnižja cena nosilca. Na različnih primerih nosilcev sem prikazal delovanje izdelanega računalniškega pripomočka. Prilagajal sem dimenzije prečnega prereza, dolžino nosilca in cene uporabljenih materialov ter nato izvedel analizo rezultatov. Ugotovil sem, da je za optimalno dimenzioniranje konzolnega nosilca ključnega pomena primerna izbira višine prečnega prereza na podprtem robu.

• Language: Slovenian
• Keywords: gradbeništvo, diplomske naloge, UNI, GR, B-GR, dimezioniranje, armiranobetonski prerez, konzolni nosilec, optimizacija
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [R. Jedlovčnik]
• Year: 2023
• Number of pages: V, 27 str.
• PID: 20.500.12556/RUL-150596-b78cca34-deee-9dcd-9e03-a5a14ba65843
• UDC: 624.012.45.:624.072.2(043.2)
• COBISS.SI-ID: 178317059
• Publication date in RUL: 21.09.2023

Secondary language

• Language: English
• Title: Optimal design of a reinforced concrete cantilever beam with variable height : graduation thesis no.:451/B-GR

Abstract

As part of my thesis, I investigated and described the procedures for designing a variable-height reinforced concrete cantilever beam. These procedures are in accordance with the standard for the design of structures, SIST EN 1992-1-1. The beam that I examined has a rectangular cross-section and is loaded by a uniaxial bending moment. The materials used are concrete, the most common material used in construction, and reinforcing steel. I focused on determining the longitudinal and shear reinforcement as well as the cracks and displacements of the beam. I developed a computational tool that allows the user to input specific data about the beam and its load, and then automatically calculates the optimal solutions in terms of cost-effectiveness of the element. The tool was designed to automatically adjust the strength class of the concrete and the height at the supported edge of the element. The criterion for optimization is the lowest cost of the beam. I used several beam examples to demonstrate the functionality of the developed computational tool. I adjusted the dimensions of the cross-section, the length of the beam, and the prices of the materials used, and then performed an analysis of the results. I found that the appropriate choice of the height of the cross-section at the supported edge of the cantilever beam is of key importance for optimal design.

• Keywords: graduation thesis, civil engineering, design, reinforced concrete cross-section, cantilever beam, optimization