Joints of glulam structures based on glued-in ribbed steel rods

Jorma Kangas

Research output: Book/ReportReportProfessional

Abstract

Glued-in ribbed steel rod joints of glulam were studied with three different experiments. (1) In test series of single-rod joints, two types of epoxy and polyurethane adhesive were used. 20 mm thick rods were glued into 25 mm holes, whose depth was 340 mm. Angle between rod and grain direction was 30 -90 . Both compression and tensile series were made. In compression series, different combinations of gluing and loading moisture contents were used. Strains in rods were measured with strain gauges. (2) In test series of V joints, the rods of joint were placed in two directions to form a 'V'. Variable combinations of angles were used. Both shear and tensile loading were used. Modelling of the capacity of V joint is presented. (3) In test series of connections of 1.2 m high beams, two types of symmetric and asymmetric connections based on V joints were loaded. Bending capacity of unjoined beam was attained. Strains were measured in connecting steel plates, to which the steel rods of the V`s were welded. Recommendation for design method of moment-resisting connections is proposed.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages94
ISBN (Print)951-38-4634-2
Publication statusPublished - 1994
MoE publication typeNot Eligible

Publication series

NameVTT Publications
PublisherVTT
No.196
ISSN (Print)1235-0621
ISSN (Electronic)1455-0849

Fingerprint

Steel
Gluing
Strain gages
Method of moments
Polyurethanes
Adhesives
Compaction
Moisture
Experiments

Keywords

  • construction
  • wooden structures
  • structural timber
  • gluelam beams
  • joints (junctions)
  • gluing
  • adhesion
  • bonding
  • ribs (supports)
  • steels
  • rods
  • epoxy resins
  • polyurethane resins
  • recommendations
  • design
  • tensile stress
  • compression tests
  • bending stress
  • moisture content
  • measurement
  • loads (forces)

Cite this

Kangas, J. (1994). Joints of glulam structures based on glued-in ribbed steel rods. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 196
Kangas, Jorma. / Joints of glulam structures based on glued-in ribbed steel rods. Espoo : VTT Technical Research Centre of Finland, 1994. 94 p. (VTT Publications; No. 196).
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abstract = "Glued-in ribbed steel rod joints of glulam were studied with three different experiments. (1) In test series of single-rod joints, two types of epoxy and polyurethane adhesive were used. 20 mm thick rods were glued into 25 mm holes, whose depth was 340 mm. Angle between rod and grain direction was 30 -90 . Both compression and tensile series were made. In compression series, different combinations of gluing and loading moisture contents were used. Strains in rods were measured with strain gauges. (2) In test series of V joints, the rods of joint were placed in two directions to form a 'V'. Variable combinations of angles were used. Both shear and tensile loading were used. Modelling of the capacity of V joint is presented. (3) In test series of connections of 1.2 m high beams, two types of symmetric and asymmetric connections based on V joints were loaded. Bending capacity of unjoined beam was attained. Strains were measured in connecting steel plates, to which the steel rods of the V`s were welded. Recommendation for design method of moment-resisting connections is proposed.",
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author = "Jorma Kangas",
note = "Project code: RTE46331",
year = "1994",
language = "English",
isbn = "951-38-4634-2",
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number = "196",
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Kangas, J 1994, Joints of glulam structures based on glued-in ribbed steel rods. VTT Publications, no. 196, VTT Technical Research Centre of Finland, Espoo.

Joints of glulam structures based on glued-in ribbed steel rods. / Kangas, Jorma.

Espoo : VTT Technical Research Centre of Finland, 1994. 94 p. (VTT Publications; No. 196).

Research output: Book/ReportReportProfessional

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T1 - Joints of glulam structures based on glued-in ribbed steel rods

AU - Kangas, Jorma

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PY - 1994

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N2 - Glued-in ribbed steel rod joints of glulam were studied with three different experiments. (1) In test series of single-rod joints, two types of epoxy and polyurethane adhesive were used. 20 mm thick rods were glued into 25 mm holes, whose depth was 340 mm. Angle between rod and grain direction was 30 -90 . Both compression and tensile series were made. In compression series, different combinations of gluing and loading moisture contents were used. Strains in rods were measured with strain gauges. (2) In test series of V joints, the rods of joint were placed in two directions to form a 'V'. Variable combinations of angles were used. Both shear and tensile loading were used. Modelling of the capacity of V joint is presented. (3) In test series of connections of 1.2 m high beams, two types of symmetric and asymmetric connections based on V joints were loaded. Bending capacity of unjoined beam was attained. Strains were measured in connecting steel plates, to which the steel rods of the V`s were welded. Recommendation for design method of moment-resisting connections is proposed.

AB - Glued-in ribbed steel rod joints of glulam were studied with three different experiments. (1) In test series of single-rod joints, two types of epoxy and polyurethane adhesive were used. 20 mm thick rods were glued into 25 mm holes, whose depth was 340 mm. Angle between rod and grain direction was 30 -90 . Both compression and tensile series were made. In compression series, different combinations of gluing and loading moisture contents were used. Strains in rods were measured with strain gauges. (2) In test series of V joints, the rods of joint were placed in two directions to form a 'V'. Variable combinations of angles were used. Both shear and tensile loading were used. Modelling of the capacity of V joint is presented. (3) In test series of connections of 1.2 m high beams, two types of symmetric and asymmetric connections based on V joints were loaded. Bending capacity of unjoined beam was attained. Strains were measured in connecting steel plates, to which the steel rods of the V`s were welded. Recommendation for design method of moment-resisting connections is proposed.

KW - construction

KW - wooden structures

KW - structural timber

KW - gluelam beams

KW - joints (junctions)

KW - gluing

KW - adhesion

KW - bonding

KW - ribs (supports)

KW - steels

KW - rods

KW - epoxy resins

KW - polyurethane resins

KW - recommendations

KW - design

KW - tensile stress

KW - compression tests

KW - bending stress

KW - moisture content

KW - measurement

KW - loads (forces)

M3 - Report

SN - 951-38-4634-2

T3 - VTT Publications

BT - Joints of glulam structures based on glued-in ribbed steel rods

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Kangas J. Joints of glulam structures based on glued-in ribbed steel rods. Espoo: VTT Technical Research Centre of Finland, 1994. 94 p. (VTT Publications; No. 196).