EVALUATION METHOD OF FLEXURAL CAPACITY FOR ASR DETERIORATED PRESTRESSED CONCRETE BEAM STRUCTURE WITH CRACK DENSITY AND MECHANICAL PROPERTIES OF DRILLED CORES

Abstract

 In order to establish evaluation method of flexural capacity for prestressed concrete (PC) beam structures deteriorated by Alkali-Silica Reaction (ASR), the evaluation method with the numerical analysis that can represent the static loading test following the long-term exposure test for 7.5 years was studied. For the input data of the analysis, the crack density and the drilled cores were used to estimate the mechanical properties of the ASR deteriorated concrete. As a result, it was found that the proposed evaluation method is effective to evaluate the flexural performance of the ASR deteriorated PC beam structure such as the load carrying capacity and the initial stiffness. In addition, the evaluation method for the real structures (ASR deteriorated PC beam) was also proposed.