[pt] Este trabalho apresenta um estudo experimental sobre a redistribuição de momentos em vigas contínuas de concreto construídas em aduelas pré-moldadas, com juntas secas, e protendidas com cabos sintéticos externos. Para tanto foram ensaiadas quatro vigas contínuas, com dois vãos iguais, sendo uma monolítica e as demais em aduelas pré-moldadas. Todas as vigas têm a mesma seção transversal tipo I, com dois vãos, altura da seção de 30 cm, largura do flange e espessura da alma igual a 30 cm e 10 cm, respectivamente. A viga monolítica tem relação 1/dp (vão/altura) igual a 18,75 e nas vigas em aduelas os valores desta relação foram entre 12,5, 18,75 e 25. As vigas são protendidas com dois cabos sintéticos externos com traçado poligonal. Os cabos utilizados são feitos com fibras sintéticas de alta resistências (2700 MPa) e alto modulo de elasticidade (126000 MPa) conhecidas comercialmente como Kevlar. O objetivo deste estudo é examinar a redistribuição de momentos em vigas contínuas com sistemas construtivos diferentes e com diferentes relações 1/dp frente à utilização de cabos sintéticos. Os resultados mostram que a redistribuição de momentos em vigas em aduelas pode ser obtida a partir de uma viga monolítica semelhante e que o comportamento da redistribuição de momentos nas vigas em aduelas é pouco influenciada pela relação l/dp. / [en] An experimental investigation on the behavior of continuous segmental concrete beams, prestressed with external aramid tendons, was carried out. Four beams were tested; one was monolithic and the others were constructed in precast dry- jointed segments. All the beams had the same overall dimensions, with two spans and an I section 30 cm high, flange width of 30 cm and web thickness of 10 cm. The 1/dp span/section height) ratio was 18,75 for the monolithic beam and 12.5, 18.75 and 25 for the segmental beams. The beams were post-tensioned with two external aramid tendons, which are made of high strength (2700 MPa) high modulus (126000 MPa)Kevlar 49 yarns. The main objective was to study the moment redistribution in the post-cracking stage. Test results have shown that the moment redistribution in segmental beams can be obtained from a similar monolithic beam and that the moment redistribution is only slightly affected by the 1/dp.

This diploma thesis deals with the design of a new bridge construction over a multi-lane communication. The converted road is a pedestrian and biking trail connecting significant agglomerations. Three studies were worked out in this thesis and the C variant was selected for further detailed processing. It is an unsymmetrical suspended bridge with a cast-in-place deck. In the section above the communication, the bridge is made up of prefabricated segments. Suspension of the structure is made of two sloping pylons forming a V-shape. The analysis of the construction was carried out in the MIDAS Civil program, where a complete model of construction was entered, including a subsequent estacade. The model describes the construction process and includes creep and shrinkage of the concrete. The traffic, temperature and wind loads were used. The design was assessed for the ultimate limit states and serviceability limit states. The assessment was carried out in the IDEA StatiCa program, supplemented by manual calculations. The static calculations also include assessment of the harmonic response. Subsequently, overview drawings, detailed drawings and visualizations were developed.