نوع مقاله : مقاله پژوهشی
موضوعات
عنوان مقاله English
نویسندگان English
Today, with the development of the aviation industry and appearance of wide-body air-planes, need to build suitable runways Thereforethe runway pavements are always ex-posed to the hard landing of the airplanes.Considering that limited research has been done on rigid concrete pavements under impact load, this research development isogeometric numerical solution method, and the results of the isogeomet-ric analysis are validated with the finite element and laboratory results. Considering the selection of less degrees of free-dom in the isogeometric method compared to the finite element observed the results of the mentioned method are closer to the laboratory results with a lower computational cost and error percentage, which is due to the use of splines. Finally, this research using The above method deals with different parameters of speed, weight mass and compressive strength of concrete it was observed that increasing the speed of the weight from 4 to 6 m/s increases the vertical displacement of the pavement at point P1 and P2, respectively amount of 108, 113% and the increase of concrete strength from the range of 54 to 90 Mpa, it causes a decrease in the vertical displacement at the point P1, P2 by 60 and 31%, and also the increase in the mass of the weight from 800 to 1400 kg causes an increase in the deviation Vertical at P1 and P2 points is 38 and 43%, therefore, increasing the speed of the weight compared to other parameters accelerates the destruction of the runway pavement
کلیدواژهها English