The use of digital image correlation for identifying failure characteristics of cross-laminated timber under transverse loading

Analysis of the vibroacoustic characteristics of cross laminated timber panels using a wave and finite element method

Structural Performance of Dowelled Cross-Laminated Timber Hold-Down Connections with Increased Row Spacing and End Distance

Embedment strength of smooth dowel-type fasteners in cross-laminated timber

Experimental investigation into the mechanical properties of scrimber composite for structural applications

Rolling shear properties of cross laminated timber are important mechanical properties for its structural application. To evaluate the influence of technical characteristics such as edge-gluing and gap size in the cross layers, on the measurement of rolling shear modulus and strength of cross laminated timber, three-layer spruce-pine-fire cross laminated timber shear block specimens with and without edge-gluing, with gaps of 2 mm, 4 mm and 6 mm, were tested by a modified planar shear test method. The mean values of rolling shear strength and modulus of No. 2 visual grade spruce-pine-fire cross laminated timber were 1.32 MPa and 111 MPa with coefficients of variance of 20% and 28%, respectively, regardless of technical characteristics. The characteristic rolling shear strength of all groups of three-layer cross laminated timber specimens was determined to be 0.88 MPa. The results indicated that the rolling shear strength and modulus values used in current design practice of spruce-pine-fire cross laminated timber were conservative. It was found that edge-gluing and gap size had a significant influence on measuring rolling shear strength rather than apparent rolling shear modulus by the modified planar shear test method. With the gap size larger than 2 mm, its influence on measuring rolling shear strength became negligible. The three major initial failure modes identified for the cross layer regardless of technical characteristics were rolling shear failure along the growth ring, tension perpendicular to grain failure in wood pith and tension perpendicular to grain failure along the wood ray.

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Influence of technical characteristics on the rolling shear properties of cross laminated timber by modified planar shear tests

The invention discloses a detachable wall and a connecting piece and disassembly and assembly method thereof and belongs to the field of wood structure connection pieces. The problems that an existing wood structure wall connection piece is complex in structure and difficult to disassemble and assemble are solved. The wall connection piece comprises a male piece body and a female piece body; the male piece body comprises a male piece bottom plate; a convex block is fixedly arranged on the male piece bottom plate through a rib strip and comprises an upper convex block body and a lower convex block body; a transverse groove is formed between the lower convex block body and the upper convex block body; a clamping piece main body is arranged in the transverse groove; the female piece body comprises a female piece bottom plate; a concave piece main body is fixed on the female piece bottom plate; a groove is formed between the concave piece main body and the male piece bottom plate; the groove corresponds to the convex block; a rib groove is further formed in the concave piece main body and corresponds to the rib strip; and clamping ports or a clamping port is formed in the two side faces or one of the two side faces of the concave piece main body and corresponds to the clamping piece main body. According to the wall connecting piece, the effect of quick connecting the wall can be achieved, disassembly and assembly are convenient, the wall structure is not damaged, and the wall connecting piece can be reused.

Yao Yue

Papers

Influence of technical characteristics on the rolling shear properties of cross laminated timber by modified planar shear tests

Embedment strength of smooth dowel-type fasteners in cross-laminated timber

Detachable wall and connecting piece and disassembly and assembly method thereof