Analiza stabilităţii, rezistenţei şi dimensionarea fermei metalice cu deschiderea de 110m destinate pentru construcţia unui pod feroviar

Abstract

Prezenta lucrare conține întroducere încare am încercat să descriu istoria podului. În primul capitul am dedescris metodica calcului fermei şi formele secțiunilor elementelor fermelor, am arătat care din ele se folosesc mai des, am descris schemele principale de calcul care sunt utilizate la proiectarea podurilor cu deschidere mare. În capitolul doi a fost efectuat calcului fermei utilizând programa SCAD, este prezentată schema de calcul al podului respectiv, calcului încărcărilor ce actionează pe ferma. În capitului dat am efectuat analiza deformațiilor și eforturilor de la combinerile de sarcini și a fost efectuat analiza detaliată a comportării structurii la actiunele seismice de 8 grade. În final a fos afectuată analiza eforțurilor în sectiunele principale ale fermei,din care s-a depistat că unele sectiuni sunt însuficiente pentu asigurarea elasticității şi rezisitenţei fermei calculate. Drept rezultat al lucrării este teza unui pod care poate de servi doleanților societății.

This work consists of an introduction where I tried to explain the history of bridges, when they appeared and how they help in human life. In the first Chapter, I described the method of calculating the farm, as well as described the main forms of sections of the main elements of farms and showed exactly what are used in practice. He also described the main design schemes used in the practice of designing bridges of great length. He described the main loads and impacts that affect the farm and stressed how and where they can be calculated. Do not forget to mention in this Chapter and the main types of steel used in the design of metal trusses used for the construction of bridges on a metal base. In the second Chapter, the farm was calculated using the SCAD program, the geometric shape of the analyzed farm was presented. The calculation of loads that affect the farm was carried out using the program West, which were calculated temperature loads, wind, snow, and constant loads from the weight of the bridge bed. In this Chapter, the values of displacements and forces from the loading combination were analyzed, and a detailed analysis of the behavior of the structure under seismic loads of 8 points was made. At the end, the analysis of the geometric sections of the main groups of the following elements was carried out: lower and upper girdle truss, struts and struts. it was also revealed that some sections are insufficient to ensure the elasticity and rigidity of the structure. As a result of the work carried out, the calculation of the truss for the bridge was performed, which can serve for a long time for the benefit of mankind.