This study presents the main results of the numerical investigation carried out on a three dimensional scaled-down moment resisting frame containing dissipative fuses. These fuse components are studied and tested in previous research projects at component and 2D full-scale level with single story. This present work aims at taking the fuses a step further by investigating their impact on global behaviour of scaled-down three dimensional building. The numerical results obtained in this paper will be used to develop the specimens that will be tested in DISSIPABLE project. Therefore, in order to accurately predict the non-linear behaviour of the test specimens under various circumstances a parametric study is developed. A couple of models are employed in order to evaluate parameters such as column base typologies, torsional actions, geometrical fuse properties and their impact on the global behaviour of the structure. Fixed and pinned supported models are developed and subjected to non-linear monotonic loading. The behaviour of the DRD3s and the structure in general is examined under twisting actions as well. The effect of the geometrical characteristics of the flange and web plates on the global performance of the frame is also studied. Apart from these, the usage of high strength steel for structural members is discussed additionally in this paper. Numerical results show that it is possible to successfully dissipate energy and concentrate plastic damages only on the DRD3 systems by also keeping other structural members elastic. Therefore, the repair work of the innovative frames can be achieved very easily and efficiently as the reparations will be limited only on the fuse plates and the elements resisting gravity loadings will remain undamaged. The detailed non-linear finite element analysis of the scaled-down hybrid structure is developed by using ABAQUS code. In the future, once the experimental tests are carried out, these numerical models will be calibrated with the corresponding experimental results.
Questo elaborato presenta i risultati di uno studio numerico effettuato su un telaio incastrato tridimensionale ridotto contenente FUSES. Questi FUSES dispositivi sono studiati e testati in precedenti progetti di ricerca riguardo ai componenti e su telai 2D a scala piena con un solo livello di altezza. Questo lavoro mira a portare i FUSES a uno step più avanzato investigando il loro impatto sul comportamento globale di un telaio tridimensionale ridotto. I risultati numerici ottenuti in questa tesi saranno utilizzati per sviluppare dei provini che saranno testati in progetti a dissipazione. Quindi, per predire accuratamente il comportamento non lineare dei test sotto varie circostanze, è stato sviluppato uno studio parametrico. Una coppia di modelli sono impegnati per valutare parametri come colonne di tipo base, azioni di torsione, proprietà geometriche del FUSE e il loro impatto sul comportamento globale della struttura. Modelli caratterizzati da supporti fissi o incernierati sono sviluppati e soggetti a carico monotono non lineare. Il comportamento dei DRD3 e della struttura in generale è esaminato sotto azioni di rotazione. Viene anche studiato l’effetto delle caratteristiche geometriche della flangia e dell’anima sulla performance globale del telaio. Eccetto questi, l’uso di acciaio ad alte prestazioni per membri strutturali è discusso in maniera aggiuntiva nella tesi. I risultati numerici mostrano che è possibile dissipare energia con successo e concentrare i danni plastici solo nel sistema DRD3 mantenendo gli altri membri strutturali in campo elastico. Quindi, il lavoro di riparazione di telai innovativi può essere realizzato molto facilmente e in modo efficiente siccome la riparazione sarà limitata solo ai piatti del FUSE e gli elementi che resistono ai carichi gravitazionali rimarranno integri. L’analisi dettagliata non lineare dell’elemento finito riguardo alla struttura ibrida scalata è sviluppata tramite il codice ABAQUS. In futuro, una volta the i test sperimentali saranno effettuati, questo modello numerico sarà calibrato con i corrispondenti risultati sperimentali.
Numerical modelling of dissipative bolted fuse components for full-scale steel-concrete composite frame shaking table test
MORINA, OJA
2018/2019
Abstract
This study presents the main results of the numerical investigation carried out on a three dimensional scaled-down moment resisting frame containing dissipative fuses. These fuse components are studied and tested in previous research projects at component and 2D full-scale level with single story. This present work aims at taking the fuses a step further by investigating their impact on global behaviour of scaled-down three dimensional building. The numerical results obtained in this paper will be used to develop the specimens that will be tested in DISSIPABLE project. Therefore, in order to accurately predict the non-linear behaviour of the test specimens under various circumstances a parametric study is developed. A couple of models are employed in order to evaluate parameters such as column base typologies, torsional actions, geometrical fuse properties and their impact on the global behaviour of the structure. Fixed and pinned supported models are developed and subjected to non-linear monotonic loading. The behaviour of the DRD3s and the structure in general is examined under twisting actions as well. The effect of the geometrical characteristics of the flange and web plates on the global performance of the frame is also studied. Apart from these, the usage of high strength steel for structural members is discussed additionally in this paper. Numerical results show that it is possible to successfully dissipate energy and concentrate plastic damages only on the DRD3 systems by also keeping other structural members elastic. Therefore, the repair work of the innovative frames can be achieved very easily and efficiently as the reparations will be limited only on the fuse plates and the elements resisting gravity loadings will remain undamaged. The detailed non-linear finite element analysis of the scaled-down hybrid structure is developed by using ABAQUS code. In the future, once the experimental tests are carried out, these numerical models will be calibrated with the corresponding experimental results.| File | Dimensione | Formato | |
|---|---|---|---|
|
2019_07_Morina_Oja.pdf
non accessibile
Descrizione: Thesis of Oja Morina
Dimensione
7.44 MB
Formato
Adobe PDF
|
7.44 MB | Adobe PDF | Visualizza/Apri |
I documenti in POLITesi sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/10589/149117