Vibration serviceability of floors for sensitive occupancies
- Authors
- Saraguro Gutierrez, Fernando
- Format
- MasterThesis
- Status
- publishedVersion
- Description
Director de tesis: Reynolds, Paul
This dissertation comprises three important parts. First, a detailed literature review into the state-of-the-art of design and assessment of floors supporting sensitive equipment, with particular emphasis in human-induced vibration. Second, modelling and analysis of a hospital floor structure and comparison of analytical responses with existing recorded experimental floor responses and third, assessment of the floor vibration serviceability in accordance with manufacturer specification. The hospital floor will support two sensitive scanners at its Magnetic Resonance Imaging (MRI) Unit. Each scanner will be supported on isolated composite floor structures (Area 1 and Area 2). The floor system for the isolated structures comprises a cat in-situ concrete slab on a profiled steel decking supported on deep steel cellular beams. To improve vibration performance, elastomeric bearing pads were provided to support the isolated floor structures. The main floor is made of a similar, but less stiff, composite floor system. The two isolated slabs and part of the main floor were modeled and analyzed using ANSYS FE software. In order to simulate pedestrians walking on the floor structure, real walking force time histories were input into the finite element model and responses calculated. The analytical responses were the compared with existing experimental floor responses. It was found that analytical responses reasonably match experimental responses for Area 1. However, for Area 2, there was inconsistency between the analytical and experimental responses. Finally, a vibration serviceability assessment according manufacturer specification was performed to determine the adequacy of the isolated slabs to support the planned sensitive scanners. The vibration assessment determined that the isolated structures are adequate to support the scanners when human-induced vibration is present. However, it also determined that under vehicle-induced ground-borne vibration, the isolated platforms fail to provide low-vibration levels, and therefore will compromise equipment performance. The isolated platforms failed the manufacturer vibration criterion and are not recommended to support the sensitive MRI scanners unless vibration mitigation measurements are implemented.
- Publication Year
- 2008
- Language
- eng
- Topic
- MAGNETIC RESONANCE IMAGING
HOSPITAL (edificios)
PISOS (pavimentos)
INGENIER?A DE LA CONSTRUCCI?N
- Repository
- Repositorio SENESCYT
- Rights
- openAccess
- License
- openAccess