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I-shaped integrated material for structure and manufacturing method thereof

A manufacturing method and technology of glulam, applied in the direction of manufacturing tools, truss structures, wood processing appliances, etc., can solve the problems of easy opening of glue between product layers, low strength and rigidity, and unoptimized application of component structure and material consumption, etc. To achieve the effect of improving the utilization rate of wood, improving the structural performance, and improving the stability of mechanical properties

Inactive Publication Date: 2015-04-01
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Description
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Problems solved by technology

The glulams used in structures in various countries in the world are all laminates arranged in parallel, and the cross-sectional shapes are mainly square and rectangular. There are three main defects in this structural form. One is that the strength and stiffness are relatively low, and the other is that the component structure and materials The dosage is not optimized, and the third is that it is easy to open the glue between the product layers

Method used

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  • I-shaped integrated material for structure and manufacturing method thereof
  • I-shaped integrated material for structure and manufacturing method thereof
  • I-shaped integrated material for structure and manufacturing method thereof

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Embodiment

[0037] Prepare the I-shaped laminated material for the structure of this embodiment according to the following steps:

[0038] 1. Sawn timber classification

[0039] Choose 30mm thick, 100mm wide and 2000mm long Japanese larch sawn timber. According to the strength probability distribution curve of Japanese larch sawn timber, the elastic modulus is divided into three regions: 8-10GPa, 10-12GPa, and 12-14GPa. 8-10GPa is classified as E1 grade, and 10-12GPa is classified as E2 grade. ~14GPa is classified as E3 grade. Different strengths will be used in different positions of I-shaped laminated timber.

[0040] 2. The manufacturing process of the upper flange glulam

[0041] Choose E2 grade 4 sawn timber, 2 milling teeth at both ends, 2 single-end milling teeth, no shoulder is required. The tooth length is 15mm, the tooth tip width is 0.8mm, and the slope is 1 / 10. Use structural glue resorcinol-formaldehyde or water-based polymer isocyanate resin glue for single-sided painting, and c...

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Abstract

The invention provides an I-shaped integrated material for a structure and a manufacturing method thereof. The manufacturing method comprises the steps of dividing sawn timber into high-grade sawn timber, intermediate-grade sawn timber and low-grade sawn timber according to the size of elastic modulus of the sawn timber; respectively making the same-grade sawn timber into finger joint laminates in a finger joint mode, making more than two finger joint laminates into laminated wood in a glued mode; enabling intermediate-grade laminated wood to serve as a top flange, enabling low-grade laminated wood to serve as a web plate, enabling high-grade laminated wood to serve as a bottom flange, enabling the intermediate-grade laminated wood and the high-grade laminated wood to be horizontally parallelly placed, enabling the low-grade laminated wood to be vertically placed, and manufacturing the I-shaped integrated material for the structure in a finger joint mode. The I-shaped integrated material for the structure is high in strength and stiffness and can be applied to main body beam members and joist beam members and the like in timber structure engineering.

Description

Technical field [0001] The present invention relates to an I-shaped laminated material for structure and a manufacturing method thereof, in particular to an "I" shaped laminated material prepared by changing the arrangement of traditional laminated materials, which has high strength and rigidity, Mainly used in the main beam components and joist beam components in wooden buildings. Background technique [0002] Structural glued laminated timber (structural glued laminated timber) is a structural timber that is made by laminating and gluing laminated boards (finger-joined, mitered or wide) divided by grades along the fiber direction parallel to each other in the thickness direction ( GB / T26899-2011 "Glulam for Structural Use"). Mainly used for load-bearing components of building structures. [0003] The output of structural laminated lumber in my country is very small (more than 90% of my country's current laminated lumber products are non-structural materials), and they are mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M3/00E04C3/14
Inventor 周海宾赵荣军孙晓梅
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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