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Samverkansbjälklag av trä och betong - Infästning mellan två bjälklagselement

Lindstén, Erik and Öberg, Karl-Johan (2015)
Programmes in Helesingborg
Abstract
Timber-concrete composite floors have been used for many years outside Sweden, although this kind of floor has not reached its full potential in Sweden. An advantage of using a timber-concrete composite floor is that the concrete is primarily subjected to compressive stress while the wood is primarily subjected to tensile stress, for the case of vertical load. The purpose of this work is to examine the static deflection and dynamic response in terms of eigenfrequency in the first mode. Measured values and values obtained from analytical models have been compared. Testing of deflection has been done, to verify that the floor fulfills the requirements regarding stiffness. Testing of the eigenfrequency in the first mode has been done to... (More)
Timber-concrete composite floors have been used for many years outside Sweden, although this kind of floor has not reached its full potential in Sweden. An advantage of using a timber-concrete composite floor is that the concrete is primarily subjected to compressive stress while the wood is primarily subjected to tensile stress, for the case of vertical load. The purpose of this work is to examine the static deflection and dynamic response in terms of eigenfrequency in the first mode. Measured values and values obtained from analytical models have been compared. Testing of deflection has been done, to verify that the floor fulfills the requirements regarding stiffness. Testing of the eigenfrequency in the first mode has been done to verify that the system of joists satisfies the recommendation from Eurocode. The deflections for different spacings of the connections between the two units were compared and parameters as price and ergonomics at assembly were taken into account. The test results show that the timber-concrete composite floors meet the requirements with a wide margin for of a length of the timber joists up to 8 meters, which indicates that lengths up to 12 meters are possible with respect to deflection, without increasing the thickness of the composite floor. Comparison of stiffness between tests and calculations verifies that the calculation method for beams with mechanical connections in Eurocode 5 presents acceptable values for bending stiffness. Test results also indicate that the floor is on the verge of fulfilling the recommendations regarding the natural frequency, therefore further investigations should be carried out. (Less)
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author
Lindstén, Erik and Öberg, Karl-Johan
organization
year
type
M2 - Bachelor Degree
subject
keywords
samverkansbjälklag, böjstyvhet, egenfrekvens, nedböjning, skjuvförbindare, provning
language
Swedish
id
7373656
alternative location
http://portal.ch.lu.se/Campus.NET/Services/Publication/Export.aspx?id=2891&type=doc
date added to LUP
2015-06-19 04:18:31
date last changed
2015-06-19 04:18:31
@misc{7373656,
  abstract     = {Timber-concrete composite floors have been used for many years outside Sweden, although this kind of floor has not reached its full potential in Sweden. An advantage of using a timber-concrete composite floor is that the concrete is primarily subjected to compressive stress while the wood is primarily subjected to tensile stress, for the case of vertical load. The purpose of this work is to examine the static deflection and dynamic response in terms of eigenfrequency in the first mode. Measured values and values obtained from analytical models have been compared. Testing of deflection has been done, to verify that the floor fulfills the requirements regarding stiffness. Testing of the eigenfrequency in the first mode has been done to verify that the system of joists satisfies the recommendation from Eurocode. The deflections for different spacings of the connections between the two units were compared and parameters as price and ergonomics at assembly were taken into account. The test results show that the timber-concrete composite floors meet the requirements with a wide margin for of a length of the timber joists up to 8 meters, which indicates that lengths up to 12 meters are possible with respect to deflection, without increasing the thickness of the composite floor. Comparison of stiffness between tests and calculations verifies that the calculation method for beams with mechanical connections in Eurocode 5 presents acceptable values for bending stiffness. Test results also indicate that the floor is on the verge of fulfilling the recommendations regarding the natural frequency, therefore further investigations should be carried out.},
  author       = {Lindstén, Erik and Öberg, Karl-Johan},
  keyword      = {samverkansbjälklag,böjstyvhet,egenfrekvens,nedböjning,skjuvförbindare,provning},
  language     = {swe},
  note         = {Student Paper},
  title        = {Samverkansbjälklag av trä och betong - Infästning mellan två bjälklagselement},
  year         = {2015},
}