Analysis on influence of wood aging on flexural behavior of wooden beam in ancient building
To study the influence of wood aging on the flexural behavior of wooden beam in ancient building,the aging mechanism of wood was analyzed.Based on the equivalent section method and empirical formula of aging depth of wooden beam in China,the bending bearing capacity degradation model of aging wooden beam was put forward,and the bearing capacity degradation evaluation of a wooden beam of an ancient building was carried out.Monotonic loading numerical simulations were conducted on both non-aged and aged wooden beam,and the rationality of the model was verified by the test.On this basis,the effects of aging uniformity and aging depth on the flexural behavior of wooden beam were further analyzed.Combined with the calculation formula of bearing capacity of flexural members in Standard for design of timber structures(GB 50005-2017),a calculation formula for the reduction coefficient of the bending bearing capacity of wooden beam considering the influence of aging was proposed.The results show that the influence of aging on the bending bearing capacity of wooden beam is linearly related to the aging uniformity,and has a univariate quadratic polynomial relationship with the aging depth.The deeper the aging depth and the greater the aging uniformity,the lower the bearing capacity of the wooden beam.
timber structure in ancient buildingaging of wooden beamflexural behaviorbearing capacity degradation modelbearing capacity reduction coefficient
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