Utjecaj načina modeliranja priključka na odgovor konstrukcije višekatnog čeličnog okvira

master's thesis

• Title (english): Influence of the joint modelling strategies on the response of multi-storey steel frame structure
• Author: Luka Lulić
• Mentor: Ivan Lukačević (mentor)
• Committee member: Tomislav Kišiček (predsjednik povjerenstva)
• Committee member: Mislav Stepinac (član povjerenstva)
• Committee member: Ivan Lukačević (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Structures); Zagreb
• Defense date and country: 2019-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering; Supporting Structures

Abstract

Općenito, krutost priključaka značajno utječe na raspodjelu unutarnjih sila i momenata savijanja u konstrukcijskim elementima pa tako i na globalno ponašanje konstrukcije. Stoga, rad istražuje različite načine modeliranja priključaka i to na primjeru čelične konstrukcije višekratne zgrade. Analizirane su tri različita načina modeliranja priključaka nosač-stup. Prvi način predstavlja osno modeliranje. Najjednostavniji je te je u učestaloj primjeni u praksi. Drugi način koristi krute veze koje omogućuju uzimanje u obzir stvarne duljine stupa i nosača. Zadnji razmatrani način je Krawinklerov model. Ovaj model je najkompleksniji i najobuhvatniji jer u obzir uzima krutost priključaka kao i krutost panela hrpta stupa. Sva tri modela detaljnije su objašnjena u uvodnom teorijskom dijelu rada. Razmatran je njihov učinak na stabilnost konstrukcije, odnosno osjetljivost na učinke II. Reda kod statičke (αcr) i dinamičke analize (Θ). U radu je provedena parametarski studija na dvije osmerokatne čelične okvirne konstrukcije. Konstrukcije su prethodno dimenzionirane u skladu s europskim normama. Na temelju dobivenih rezultata doneseni su zaključci s korisnim smjernicama za buduća istraživanja.

Abstract (english)

The stiffness of the joint is essential for the distribution of internal forces and bending moments in structural elements as well as global behaviour of the structure. Hence, this paper focuses on different joint modelling strategies based on the steel multistorey frame structure. Three different modelling assumptions for the beam-column joint are analysed. The first model is based on axial modelling. This is the simplest model and is often used in practice. The second model uses rigid links that allow for actual column and beam lengths to be considered. The last model considered is the Krawinkler model. It is the most complex and comprehensive because it considers the stiffness of the joint as well as the stiffness of the column web panel. All three models are explained in more detail in the theoretical part of the paper. Effect of these models on the stability of the structure, i.e. on the sensitivity to the second-order effects in case of static (αcr) and dynamic analysis (Θ) has been observed. The parametric study is performed for two 8-storey steel frame structures. In the first step structures were designed in accordance with European standards. Based on the obtained results, conclusions were drawn alongside with useful guidelines for future research.

• Keywords: višekatni čelični okvir; modeliranje priključaka; krute veze; Krawinklerov model
• Keywords (english): multistorey steel frame; joint modeling; rigid links; Krawinkler model
• Language: croatian
• URN:NBN: urn:nbn:hr:237:362910
• Study programme: Title: Civil Engineering; specializations in: Construction Management, Transportation Engineering, Geotechnical Engineering, Hydraulic Engineering, Structural Engineering, Construction Materials, Theory and Modeling of Structures; Course: Structural Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka građevinarstva (magistar/magistra inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-11-20 08:18:29