Prestressed double laminated wood beam

A prestressed, double-spliced ​​beam technology, applied in joists, girders, trusses, etc., can solve problems such as insufficient strength to be fully exerted, and achieve the effects of beautiful appearance, improved ductility, and light weight.

Inactive Publication Date: 2014-09-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether reinforced or not, the load-bearing capacity of glulam beams is usually controlled by deformation, and its strength cannot be fully utilized

Method used

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  • Prestressed double laminated wood beam
  • Prestressed double laminated wood beam
  • Prestressed double laminated wood beam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 1-8 Shown: a prestressed double glued wood beam, including wooden beam main body 1, prestressed tendon 2, steering device 3, anchorage 4, steel pad 5, anchor pad 6, beam end pad 7, span Pad block 8 and self-tapping screw 9, described wooden beam main body 1 is a double-joint beam, and the double-split beam is connected as a whole by beam end pad 7 and span pad 8 arranged at intervals along the full length of the component, and beam end pad 7, The spacer 8 is connected with the wooden beam main body 1 by fixing the spacer bolt 15 . The prestressed tendons are set 2 in the middle gap of the double-split beam, and the two ends of the prestressed tendons 2 are anchored to the beam end through the anchor 4 and the anchor backing plate 6, and the beam end is provided with a beam for anchoring the anchor backing plate. The end screw hole 10 and the prestressed tendon hole 11 are reserved at the beam end, the anchor backing plate 6 is provided with the anchor b...

Embodiment 2

[0039] Such as Figure 7-9 As shown, the difference between this embodiment and Embodiment 1 is that: the wooden beam main body 1 is a box-shaped beam, and the prestressed tendons 2 are arranged in the hollow space of the box-shaped beam.

Embodiment 3

[0041] Such as Figure 10-12 As shown, the difference between this embodiment and Embodiment 1 is that the supporting body 3-1 of the steering device 3 is rectangular.

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PUM

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Abstract

The invention discloses a prestressed double laminated wood beam. The prestressed double laminated wood beam comprises a wood beam main body, prestressed tendons, steering devices, anchorage devices, steel cushion blocks, anchor bearing plates, beam end cushion blocks, span cushion blocks and self-tapping screws, wherein the wood beam main body is a double beam or a box beam; the prestressed tendons are arranged in a hollow gap of the double beam or a hollow space of the box beam; two ends of the prestressed tendons are anchored at the ends of beams, at bodies of poles or between the beams through the anchorage devices and the anchor bearing plates; the steel cushion blocks are arranged between the anchorage devices and the anchor bearing plates; the self-tapping screws or embedded steel bars for reinforcement are arranged in the contacted places of the wood beam main body and the anchor bearing plates; and the prestressed tendons are provided with one or more steering devices in the span. The prestressed double laminated wood beam has the advantages of large span, high bearing capacity, light dead weight, material conservation, simple system, beautiful appearance, realization of industrialized production and quick installation, can be applied to new construction of large-span buildings and bridge structures, and can be applied to such fields as reinforcement of existing buildings and bridges.

Description

technical field [0001] The invention relates to a prestressed double glued laminated beam, which is mainly (but not exclusively) used in the fields of building structures, roofs, bridge superstructures and the like. Background technique [0002] Generally, the glulam beam shows brittle tensile failure when it is bent, and the timber on the compression side cannot be fully utilized. At home and abroad, steel bars or FRP (Fiber Reinforced Polymer) materials are used to strengthen glued wood beams, and the effect is obvious. However, whether reinforced or not, the load-bearing capacity of glulam beams is usually controlled by deformation, and its strength cannot be fully utilized. In order to solve the problem of large deformation and further improve the structural performance of glulam beams, applying prestress to the reinforcing material is one of the feasible measures. [0003] External prestressing is one of the important branches of the post-tensioning prestressing syste...

Claims

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Application Information

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IPC IPC(8): E04C3/12E04C3/18E01D19/00E01D101/10
Inventor 杨会峰刘伟庆郝建东鞠冬冬陆伟东
Owner NANJING UNIV OF TECH
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