Sistemas de juntas de trabalho em estruturas pré-moldadas de concreto armado e alvenaria convencional: estudo de caso UEMG - Frutal

Abstract

In mid-2006, the installation of a campus of the University of the State ofMinas Gerais UEMG was approved for the city of Frutal, located at the region called Triângulo Mineiro. Due to the necessity of the initial installations, which were called Block A, in a short period of time, it was decided by the precast structure. Besides the high quality standard of this method, it provides the end of the works in a shorter time. However, the sealing and division of the structure was done in conventional masonry. The building was treated as a conventional structure and coated as a whole, not receiving the proper care either with the work or with the expansion joints. As a result, the closures of openings were tightened. One of the features of the pre-cast structures is the big moving of theparts that compose the whole structure, and because of that, there were many pathologies arising from the movement of the structure during the construction and later, while the building was being used. In 2008, it was started the construction of a new building, called Block B. There was the necessity of constructing a similar building to the Block A. This new building should not present the same problems as the first one, so thecompany responsible for the work started the studies in order to bring a feasible solution. The use of metallic profiles attached to the concrete structure was the solution found. Those metallic profiles acted as an anchorage for the masonry, but didnt restrict the characteristic movements of the pre-cast structure. This solution will be presented on this paperwork, as well as the problems occurred in the first building.