This Master Thesis deals with prediction of reinforced concrete slabs after they have started to crack. Tension In uncracked state of reinforced concrete slabs is carried by concrete and steel reinforcement. In Fully cracked state tension is carried by pure steel reinforcement. However, between these two states some tension is carried by concrete between cracks. This Effect is called tension stiffening. Moreover, Tension stiffening effect is affected by time dependent deformations such as creep and shrinkage. However, Creep and shrinkage are not discussed in this thesis. Reinforced Concrete slab system is analyzed using Finite Element method. Finite Element code is implemented and verified using analytical results. Analysis Of the slabs uses four-node quadrilateral plate element. Tension stiffening effect is modeled using semi empirical approach. Two Different methods are implemented to predict nonlinear response of reinforced concrete slab system. First method involves stiffness reduction factors, which are determined using effective moment of inertia. Second Method involves calculation of mean curvatures between uncracked and fully cracked state. This Method is presented in Eurocode 2 and is implemented in Finite Element code by author. Different Slab systems are analyzed using both two methods and results are compared. Work Consists of: 62 pages, 52 figures, 9 tables and 24 references.     «

This Master Thesis deals with prediction of reinforced concrete slabs after they have started to crack. Tension In uncracked state of reinforced concrete slabs is carried by concrete and steel reinforcement. In Fully cracked state tension is carried by pure steel reinforcement. However, between these two states some tension is carried by concrete between cracks. This Effect is called tension stiffening. Moreover, Tension stiffening effect is affected by time dependent deformations such as creep...     »