ABSTRACT
Long-term behavior of timber-concrete composite members is significantly influenced by the stiffness of the connection system. The highest stiffness can be achieved by adhesive. In this paper, results of long-term bending test of timber-lightweight concrete composite floor elements with adhesive shear connection are presented. The composite connection of two materials by the adhesive for bonding wet concrete to timber was performed. Two types of composite slabs were used. From the measured values of deflection, the global creep coefficient of both investigated composite beams was estimated. After 3 years of testing, the measured deflection of the specimens overestimates the limit values for service limit state of beams for ceiling structures. These results show that the creep and shrinkage of materials, as well as the influence of the environmental changes, can not be neglected in the design process. Comparison of the test with results of simplified calculation model is finally presented.
