Ultrasonic pulse velocity and artificial neural network prediction of high-temperature damaged concrete splitting strength

To examine the integrity of any structure following a fire, assessments of the impact of high temperatures on concrete are essential, particularly its decreased in tensile strength. Destructive examinations, such as the extraction of concrete cores, can pose significant cost and safety challenges, particularly when applied to structures that have already sustained damage. Consequently, for assessing damaged concrete, non-destructive in-situ tests are the favored approach. This study aims to develop an artificial neural network model utilizing data from ultrasonic pulse velocity measurements. The model's purpose is to assess the tensile splitting strength of concrete subjected to elevated temperatures, ranging from 200 to 800 ?C. The splitting strength investigation showed that increasing the exposure temperature from 200 to 800?C results in splitting strength reduction of 15 to 75% respectively. Also, the ultrasonic pulse ?