Estudio teórico experimental de vigas SRC rectangulares de hormigón reforzadas con perfil de acero tipo "I", sujetas a flexión.

Abstract

Finding the effective inertias in encased composite members SRC (Steel Reinforcement Concrete), it has been a true challenge for the normative AISC and researchers, a practical way to solve this inconvenient, is determining the individual contribution of materials in terms of stiffness. The cross section of SRC beams is conformed by: structural steel profile, reinforcement steel and concrete, the stiffness of the last one is corrected through a coefficient that reduces the strength of concrete due to the cracking. Through of theoretical methods from natural elastic, plastic and analysis with fiber elements it pretends to characterize the structural performance and flexural strength at SRC section, the results found from theoretical methods will be compared with the other experimental results of eight SRC beams tested to pure bending at four points. Based on the curves of experimental effective stiffness, it proposes the coefficient C1 which controls the contribution of concrete, this one will be useful to find out the necessary effective inertias for designing and modeling of SRC beams that are very used in modern civil constructions.