Using the Ultrasonic Stress Wave Technique to Evaluate Structural Timber Members of an Old Masonry Building
Öz
Aim of
study: The main objective of this study is to evaluate the current state of the
structural timber members of an old masonry building by using destructive and
non-destructive test methods and to determine the efficiency of non-destructive
test methods by obtaining correlations between destructive and non-destructive
test parameters.
Area of
study: Specimens were extracted from different parts of an old semi-detached
masonry building in Istanbul, Turkey. The building was built at the beginning
of the 20th century in Kadıköy, a residential district in the Asia side of
Istanbul.
Material
and Methods: Ultrasonic stress wave test was carried out on
specimens prepared from the structural members. Following the ultrasonic based
non-destructive tests, the bending strength and modulus of elasticity in the
bending tests were determined for the specimens.
Main
results: According to the results of the experiments, it was observed that the
regression correlations were high for the softwoods (fir and spruce), but
relatively lower correlations were obtained for the chestnut specimens.
Highlights:
Because
of the good R2 values obtained between the MOED and
mechanical properties of the softwoods, the non-destructive stress wave
technique can be recommended for the evaluation of softwoods in structures.
Although chestnut showed very good mechanical properties, a satisfactory
evaluation of the chestnut members could not be obtained because of the small
number of specimens. Further investigation is needed with large sample groups.
Anahtar Kelimeler
Structural Timber,Destructive Test,Non-destructive Method,Chestnut Wood,Fir Wood,Spruce Wood
Kaynakça
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