There were two types of concrete used: M200 with its compressive strength of 20.53 MPa and M300 with its compressive strength of 31.55 MPa. All tested beams were prepared with their dimensions of 150 × 150 × 900 mm and experimented under three-point bend test. This paper studied on the behaviors of RC beams strengthened with three-surface-steel cover. The side product to deliver concerns the simulation tools to be developed, which will also be of interest for other multi-physics problems. The main product to deliver is to achieve a novel concept of inland wind-turbines, referred to as Perpetual Mobile, which offers the optimal capacity for harvesting energy at large variations of wind speeds and for perfectly adapting to variable conditions inside wind-turbine farms. All these developments will be combined in simulation tools, which will be validated against experimental results and more elaborate predictive computations of underlying multi-physics problems.
In particular, we need to develop detailed models capable of describing the large displacements and rotations of flexible blades (including evaluation of risk to blades failure), the reduced basis approach that can furnish the optimal support for control algorithm of large overall motion of flexible blades and stochastic approach able to quantify the effects of variable wind conditions that can be obtained from measurements of wind-turbine deformations by solving an inverse problem. There are multiple main scientific challenges in this work seeking a judicious combination of scientific progress in Mechanics, Control and Stochastics in order to provide the simulation tools for elaboration of such a new concept. This new concept to evaluate concerns the wind-turbines with flexible blades, which are easy to start for mild winds, like the leaves on a tree, but more difficult to control for strong winds, with large overall motion of flexible blades. For any other location, the system is far from optimal performance, mostly sitting idle waiting for optimal wind speed. Both of these locations provide near steady winds close to optimal conditions for wind-turbines operation. In this work we seek to elaborate a couple of new concepts of off-shore and inland wind-turbines with respect to currently dominant system, which was, to a large extent, developed in Denmark and in Northern Germany.