INTRODUCTION AND SCOPEOF WORK DERIVATIVES OF THE NATURAL MODES, DYNAMIC AXIS ROTATIONS AND CURVATURE CHANGE IN STRUCTURAL HEALTH MONITORING REVIEW OF THE APPLICATION OF INCLINOMETERS, ROTATION RATE AND ROTATION ACCELERATION SENSORS IN MODAL ANALYSIS AND STRUCTURAL MONITORING Rotation Rate and rotation acceleration sensors Shearography InclinometersLITERATURĘ REVIEW OF MONITORING OF REINFORCED CONCRETE STRUCTURES USING VIBRATION-BASED METHODS Studies on generał methods of damage detection and problems in the monitoring of r/c structures Stiffness distribution reconstruction methods LITERATURĘ REVIEW ON THE MASS LOCALISATION AND IDENTIFICATION TECHNIQUES MODEL UPDATING AND MODAL ANALYSIS METHODOLOGY Model updating Optimisation problem Genetic algorithms Computer system Experimental modal analysis APPLICATION OF ROTATION RATE SENSORS IN MASS IDENTIFICATION Numerical analysis of mass identification using rotational modes simply supported beam cantilever beam Experimental Results General description Modal analysis Modal analysis of a Steel beam in free-free configuration Modal analysis of a Steel beam in the simply supported configuration Mass identification Steel beam in the free-free configuration Simply supported Steel beam STIFFNESS DISTRIBUTIONRECONSTRUCTIONOFDAMAGED REINFORCED CONCRETE BEAMSWITH ROTATIONRATESENSORS Modal analysis Ultrahigh performance concrete beam results Reinforced concrete beam results Stiffness distribution reconstruction Ultrahigh performance concrete beams Reinforced concrete beam results Free-Free configuration Simply supported configuration CONCLUDING REMARKS Stiffness and mass matrices of finite elements Steel prings technical data Numerical model of a Steel beam Ultrahigh performance concrete samples technical data Rotation rate and translational acceleration sensors properties Numerical models of reinforced concrete beams