Long-term behaviour of wood-concrete composite beams with notched connection detail
Investigates the long-term behaviour of wood-concrete composite floor/deck systems with shear key/anchor connection detail. The beam specimens were first monitored in time after the concrete placement on the wood deck, and then subjected to a sustained load. The experimental results have also been extended to the entire service life of the structure using a Finite Element model. The primary observations are: (i) the bleeding of the fresh concrete is not an issue for the durability of the wood deck; (ii) the type of construction (shored, unshored) is of little influence for the structural performance; (iii) the deflection increases quite significantly over the time because of the rheological phenomena of the component materials. The use of concrete with reduced shrinkage and the pre-cambering of the wood deck are two possible ways to reduce the long-term deflection. The experimental and numerical results are finally compared with those obtained using a simplified approach, showing that the simplified approach leads to reasonably good accuracy.