PROPOSAL OF AN OPTIMIZED EXPERIMENTAL METHOD FOR CRACKED CONCRETE : Development of a shear loading system type of highly controlled crack surface and identification of optimized control parameter Part 1

Abstract

In this study, a new experimental method has been proposed in order to elucidate shear transfer mechanism of cracked concrete. For the purpose of controlling transition of crack width under shear stress mode precisely and automatically, 4-axes loading system based on optimal control theory and PID algorithms has been introduced. As the results, it is proved that this kind of experiments should be controlled not manually but automatically for the accuracy. Moreover, the experimental data obtained by using this system also identify the optimal PID values for this kind of experiments.