A cross-laminated timber assembled timber arch structure

Abstract

The invention discloses a cross laminated timber (CLT)-assembled wood arch structure which comprises one or more wood arch bodies arranged along a width direction of a wood arch, wherein each wood arch body is respectively formed by splicing a plurality of CLTs in sequence along a length direction of the wood arch; two adjacent CLTs are fixed by side connecting metal pieces; one or more compositefastening and tensioning layers are fixed on an upper surface of each wood arch body; each CLT has a cross section of isosceles trapezoid and has an upper surface longer than a lower surface; the composite fastening and tensioning layers are carbon fiber layers, glass fiber layers or steel strips; and the wood arch bodies and the composite fastening and tensioning layers thereon are in an arched state after being mounted in place and are in a flat plate state when being transported and stacked for storage. The CLT-assembled wood arch structure is convenient to be transported, simple and rapidto be assembled, and short in on-site construction time by adopting a manner of factory prefabrication and on-site local assembly, and is capable of effectively utilizing dimensional stability of theCLTs and greatly improving a utilization rate of compressive strength.

Description

technical field [0001] The invention provides an assembled cross-glued wood arch structure, which belongs to the technical field of assembled wooden structures. Background technique [0002] Prefabricated wooden structure buildings are pre-produced in a professional factory with some or all of the wooden structural parts, transported to the construction site for assembly. The prefabricated structure is a fundamental change to the traditional construction method. Compared with the traditional construction method, the prefabricated building adopts the method of factory assembly line production and on-site rapid hoisting, which can increase the speed of construction and reduce the amount of construction on site. At the same time, it is energy-saving. , material saving, noise reduction and other aspects have a significant effect. [0003] Cross laminated timber (CLT) is a new type of engineered wood product, which consists of at least three layers of solid wood sawn timber or c...

AI Technical Summary

Problems solved by technology

However, the design value of the along-grain compressive strength of wood is about 1.3 to 1.6 times the design value of the along-grain tensile strength, which leads to the underutilization of the compressive strength of wood and limits the span of CLT.

[0005] At present, the commonly used wooden arch structures are mainly "woven wood arch bridge", "cross-wood arch bridge", "glued wood arch structure", etc., mostly using logs or glued wood to make load-bearing arch ribs, and then laying planks on the arch ribs , its component processing is complex and the assembly level is low, resulting in a long construction period

The use of CLT to make wooden arches is still in the research and exploration stage, and has not been popularized and applied. CLT is also mostly used in plate components in wooden structures, and there are few studies on curved and special-shaped CLT.

The process of preparing curved and special-shaped CLT sheets by vacuum pressure is complex and costly, and has not yet been applied on a large scale

Searching domestic published patents and related documents, no research or patents have been found on how to use CLT flat panels to process prefabricated wooden arch structures in factories and meet the requirements of convenient transportation and rapid assembly

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