木质夹层梁横向承载挠度的预测与验证

doi:10.11707/j.1001-7488.20140718

Abstract

Abstract:

The equation to calculate transverse displacement in mid span of sandwich beam was derived by revision of Reissner theory and considering indentation deformation of central loading. It was shown that the resistance to the shear force of skin was equivalent to the half thickness of honey-comb core. By comparison with test results, Revised first-order theory(RFOT)had higher accuracy than classical first-order theory(CFOT)in general to calculate the transverse displacement of sandwich beam. Furthermore, the transverse displacement of "∥" direction specimens were bigger than "⊥" direction ones because of shear deformation. It was also indicated the transverse displacement including bending and shear deformation were all decreased gradually with increasing core thickness, but the proportion of shear displacement to the total became larger step by step. In addition, shear displacement and cross-sectional stress calculated by RFOT was less than CFOT, but the two theories tended to be identical with increasing core thickness.

Key words: wooden composite, sandwich beam, Reissner theory, first order, bending property

CLC Number:

S781.2

Hao Jingxin, Wu Xinfeng, Liu Wenjin. Modeling and Verification of Sandwich Beam with Wooden Skin and Honey-Comb Core Subjected to Transverse Loading[J]. Scientia Silvae Sinicae, 2014, 50(7): 128-137.

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Modeling and Verification of Sandwich Beam with Wooden Skin and Honey-Comb Core Subjected to Transverse Loading

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