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Simulation of vehicle impact into a steel building: A parametric study on the impacted column end-connections
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Byggvetenskap, Bro- och stålbyggnad.
2015 (engelsk)Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
Abstract [en]

Understanding the true behaviour of impacted structures is the only way to assess their robustness under exceptional events such as vehicle collision. The primary objective of this master’s thesis was to perform a finite element parametric investigation on the influence that some parameters have in steel buildings subjected to vehicle impacts. The parameters chosen for the study, involved uncertainties in the material definition and in the load configuration of the bolts used in the impacted column end-connections.

By using the Abaqus software, a finite element model of the structure has been created. The five storey steel building considered has been modelled in a simplified manner with the exception of the impacted area which, instead, has been defined in a more detailed fashion.

During the simulations, different preload conditions have been used, comparing cases with and without the preload force. Regardless its variation, it has not been observed any increase in the structural resistance.

On the other hand, the simulation provided interesting results for what concerns the material variations in the bolts. Although the changes have been small in magnitude, the effect on the structural response during the impact was remarkable. For all the cases considered, an increase of the material ductility, achieved by increasing the ultimate strain at failure, entailed higher resistance of the connections. Various failure modes have been observed when the material properties have been changed.

Having clarified the influence of the assumptions made, the results provided helpful information in sight of future studies. Although the model still needs to be validated, the research clarified which of the parameters investigated are to be collected with more attention.

Keywords: Vehicle collision, steel building, FE model, Abaqus/Explicit, parametric investigation, bolt preload, bolt material.

sted, utgiver, år, opplag, sider
2015. , s. 52
Serie
TRITA-BKN-Examensarbete, ISSN 1103-4297
Emneord [en]
vehicle impact, FE model, Abaqus/Explicit, steel structure, bolt preload
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-172341OAI: oai:DiVA.org:kth-172341DiVA, id: diva2:847125
Fag / kurs
Structural Design and Bridges
Utdanningsprogram
School of Architecture and the Built Environment (ABE) - Master of Science in Engineering
Veileder
Examiner
Tilgjengelig fra: 2015-08-21 Laget: 2015-08-19 Sist oppdatert: 2015-08-21bibliografisk kontrollert

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