| Abstract [eng] |
Developments in lightweight steel-concrete composite floors with long spans are resulting in structures with low natural frequencies. Potentially, these floors are sensitive to vibration issues. Vibrations are mostly caused by human activities on the floor. However, vibrations due to mechanical systems can also cause problems. This thesis analyses approaches on how to manually calculate natural frequency and dynamic response of slim composite floors by using available design guidelines. Composite slim steel-concrete floors with hollow-core slabs are chosen in the analysis because they are one of the most popular on construction market nowadays. Additionally, Finite Element Method software (i.e. SCIA Engineer and Autodesk Robot Structural Analysis) is used to determine the dynamic properties of these floors. Moreover, the author has created nomographs to calculate the natural frequency of floor elements much easier with less calculation. Finally, all results from the manual and numerical calculations, as well as nomographs are compared and concluded. |
