Introduction to the earthquake phenomenon. Response of structures to seismic actions depending on the type of earthquake and the form of the structure. Principles for the design of the load-bearing structure of reinforced concrete buildings for reliable behaviour in a possible earthquake and uniform damping of the introduced seismic energy. Configuration in plan and in terms of height to avoid abnormal arrangements, soft floor, planted columns, short columns, abrupt change in stiffness in plan and in height, diaphragm function of slabs, seismic joint. Positive and negative influence of reinforced brick masonry walls embedded in reinforced concrete frames on the seismic response of a structure depending on their location. Reference to the most common seismic damages of a building and typical ways of repairing and strengthening the damages. Soil-structure interaction and different foundation methods depending on the characteristics of each project. Excavation support, problems and methods of support.