Análise do comportamento e determinação da resistência de chumbadores ancorados em blocos de concreto submetidos a forças horizontais.

Abstract

The main purpose of this paper is to determine the horizontal forces that can be applied in the particular situation of an isolated bolt and two bolts anchored in a concrete block. So, the mathematic formulation of beams on infinite elastic supports is presented, thus simulating the behavior of the anchored bolt. The formulas for calculating the contact strains between curved bodies are discussed and presented, as well as the acceptable values and limit compression strains on the concrete in reduced areas. The Finite Element Method via ANSYS Program is used for the numeric processing of the models representing both an isolatedanchor bolt and two bolts anchored in a concrete block. With the results reached, a proposal for a form to obtain the maximum strains in the concrete and in the steel was elaborated, taking into account the variation of the resistance characteristic in the spring constant of the elastic medium that surrounds the anchor bolt. This form also allows the determination of the horizontal force that can be applied to the anchor bolt, and considers a reduction factor to be used in the event of two anchor bolts aligned with the applied force.