Monitoring and assessment of structures is one of the most interesting and urgent topics that occupies a central role in research. Bridges are no exception: due to their location and structure they are often subjected to critical environmental conditions and load cases. A widely exploited structural scheme is the dapped end beam, obtained using a particular joint (half-joint) which geometry does not allow direct inspections in its critical zones. The aim of the thesis is to provide a useful generic tool: a safe, fast, reliable indication of the strength of the element, a model that can be of a vast application, with different reinforcement layouts, different geometries.