AN\uc1LISIS DE UNA PLACA BASE DE UNI 3N ENTRE COLUMNA DE CONCRETO-COLUMNA DE ACERO EN EL RANGO NO LINEAL

En este trabajo se estudi\uf3 el comportamiento en el rango lineal y no lineal de una junta (junta viga-columna) en una probeta a escala real, constituida por una columna de concreto unida a dos vigas de concreto mediante un vaciado monol\uedtico; la columna de concreto se conect\uf3 a trav\ue9s de una placa base de acero a una columna de acero HEA160 sometida a cargas c\uedclicas durante un per\uedodo de 5.000 s, obteniendo as\ued, su curva de comportamiento hister\ue9tico. Se cre\uf3 un modelo matem\ue1tico en el programa ABAQUS CAE a fin de verificar que el dise\uf1o de la junta de la probeta cumpliera con los requisitos normativos para el dise\uf1o de placas base, en base a aplastamiento del concreto y espesor de la placa. En los pernos se verific\uf3 su resistencia a fuerzas de corte, deformaci\uf3n por tracci\uf3n, verificaci\uf3n por cono tracci\uf3n en el concreto y esfuerzos de tracci\uf3n dentro de la zona agrietada, se obtuvo como resultado que la falla se produjo por agrietamiento del concreto armado. Palabras clave: nodo viga-columna, pseudo-est\ue1tico, ABACUS CAE. ABSTRACT In this research the behavior of a real scale experimental joint (column-beam joint) formed by three reinforced concrete elements, 1 column and 2 beams, attached to a structural steel column in the upper level is studied. The object in question was subjected to the action of cyclic loads in a single direction, in a pseudostatic test for 5000 s, in order to observe which element of the concrete cylinders failed and which the failure mode was. A mathematical model was created in the ABAQUS CAE software, in order to verify that the design of the gasket of the test piece complied with the normative requirements for the design of base plates, based on concrete crushing and thickness of the base plate. In the bolts its resistance to shear forces, tensile deformation, and verification by tensile cone in the concrete and tensile stress within the cracked area was verified, and it was obtained as a result that the failure was produced by cracking of the reinforced concrete. Keywords: beam-column joint, pseudo-static, ABAQUS CAE.