This paper presents a study to get optimum type of crane girder. Three types of structures were studied: Pratt truss, Vierendeel frame and plate girder. Length of crane girder is 30 m and designed to carry 60 kN. Only (I) and angle steel sections were used to build crane girder. A nonlinear model was adopted to simulate the girder using finite element method. Weight of girder and maximum deflection were the main parameters used to compare. The results of the study identified that Vierendeel frame is the suitable type compared to the others to be designed and installed for this crane.
Non-destructive tests (NDTs) represented one of the solutions that aid the engineers to evaluate the strength of materials. However, the results obtained using such tests still questionable as they may be affected by different factors. One of these factors is the presence of steel reinforcement in concrete. An experimental investigation is presented in the current study to investigate the effect of the distribution of steel reinforcement on the one of the most common NDTs named Ultrasonic Pulse Velocity (UPV). However, two small-scale concrete slabs were tested and the results were successfully obtained. Two different spacing between the longitudinal reinforcement were considered. Also, the effect of measuring the UPV in the top and bottom surface of the RC slab was studied. The effect of direct path length was also investigated. The results showed that the presence of reinforcement considerably affects the UPV values. Besides, no judgement was made to decide the effect of path length as fluctuated results were obtained.
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