Curved and cambered glulam beams: Part 2. Long term load tests under cyclically varying humidity

Alpo Ranta-Maunus, Shankare Gowda

Research output: Book/ReportReport

Abstract

In this second part of the test series, creep and long-term strength of curved and cambered glue- laminated timber beams are studied under cyclically varying humidity conditions. The beams are loaded in such a way that the failure is caused by tension perpendicular-to-grain. A total of 24 beams were loaded under long term loading. The tests indicated that the strength of the beams during the four weeks loading time is around 60 % of the short term strength of similar beams, which in turn is higher than predicted by CEN standard -type tension tests. Painted beams showed considerably smaller duration of load effect and less creep. Practically there was no difference between cambered and curved beams in their strength capacity under long term loading.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages62
ISBN (Print)951-38-4409-9
Publication statusPublished - 1994
MoE publication typeNot Eligible

Publication series

SeriesVTT Publications
Number171
ISSN1235-0621

Fingerprint

Atmospheric humidity
Creep
Glues
Timber

Keywords

  • wooden structures
  • construction
  • building components
  • beams (supports)
  • glulam beams
  • curved beams
  • structural members
  • camber
  • behavior
  • loads (forces)
  • determination
  • stress concentration
  • tests
  • experimentation
  • finite-element analysis
  • displacement
  • comparison
  • tensile stress
  • bending stress
  • load-carrying capacity
  • Eurocode 5

Cite this

Ranta-Maunus, A., & Gowda, S. (1994). Curved and cambered glulam beams: Part 2. Long term load tests under cyclically varying humidity. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 171
Ranta-Maunus, Alpo ; Gowda, Shankare. / Curved and cambered glulam beams : Part 2. Long term load tests under cyclically varying humidity. Espoo : VTT Technical Research Centre of Finland, 1994. 62 p. (VTT Publications; No. 171).
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title = "Curved and cambered glulam beams: Part 2. Long term load tests under cyclically varying humidity",
abstract = "In this second part of the test series, creep and long-term strength of curved and cambered glue- laminated timber beams are studied under cyclically varying humidity conditions. The beams are loaded in such a way that the failure is caused by tension perpendicular-to-grain. A total of 24 beams were loaded under long term loading. The tests indicated that the strength of the beams during the four weeks loading time is around 60 {\%} of the short term strength of similar beams, which in turn is higher than predicted by CEN standard -type tension tests. Painted beams showed considerably smaller duration of load effect and less creep. Practically there was no difference between cambered and curved beams in their strength capacity under long term loading.",
keywords = "wooden structures, construction, building components, beams (supports), glulam beams, curved beams, structural members, camber, behavior, loads (forces), determination, stress concentration, tests, experimentation, finite-element analysis, displacement, comparison, tensile stress, bending stress, load-carrying capacity, Eurocode 5",
author = "Alpo Ranta-Maunus and Shankare Gowda",
note = "Project code: PUU10922 Project code: RTE4610",
year = "1994",
language = "English",
isbn = "951-38-4409-9",
series = "VTT Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "171",
address = "Finland",

}

Ranta-Maunus, A & Gowda, S 1994, Curved and cambered glulam beams: Part 2. Long term load tests under cyclically varying humidity. VTT Publications, no. 171, VTT Technical Research Centre of Finland, Espoo.

Curved and cambered glulam beams : Part 2. Long term load tests under cyclically varying humidity. / Ranta-Maunus, Alpo; Gowda, Shankare.

Espoo : VTT Technical Research Centre of Finland, 1994. 62 p. (VTT Publications; No. 171).

Research output: Book/ReportReport

TY - BOOK

T1 - Curved and cambered glulam beams

T2 - Part 2. Long term load tests under cyclically varying humidity

AU - Ranta-Maunus, Alpo

AU - Gowda, Shankare

N1 - Project code: PUU10922 Project code: RTE4610

PY - 1994

Y1 - 1994

N2 - In this second part of the test series, creep and long-term strength of curved and cambered glue- laminated timber beams are studied under cyclically varying humidity conditions. The beams are loaded in such a way that the failure is caused by tension perpendicular-to-grain. A total of 24 beams were loaded under long term loading. The tests indicated that the strength of the beams during the four weeks loading time is around 60 % of the short term strength of similar beams, which in turn is higher than predicted by CEN standard -type tension tests. Painted beams showed considerably smaller duration of load effect and less creep. Practically there was no difference between cambered and curved beams in their strength capacity under long term loading.

AB - In this second part of the test series, creep and long-term strength of curved and cambered glue- laminated timber beams are studied under cyclically varying humidity conditions. The beams are loaded in such a way that the failure is caused by tension perpendicular-to-grain. A total of 24 beams were loaded under long term loading. The tests indicated that the strength of the beams during the four weeks loading time is around 60 % of the short term strength of similar beams, which in turn is higher than predicted by CEN standard -type tension tests. Painted beams showed considerably smaller duration of load effect and less creep. Practically there was no difference between cambered and curved beams in their strength capacity under long term loading.

KW - wooden structures

KW - construction

KW - building components

KW - beams (supports)

KW - glulam beams

KW - curved beams

KW - structural members

KW - camber

KW - behavior

KW - loads (forces)

KW - determination

KW - stress concentration

KW - tests

KW - experimentation

KW - finite-element analysis

KW - displacement

KW - comparison

KW - tensile stress

KW - bending stress

KW - load-carrying capacity

KW - Eurocode 5

M3 - Report

SN - 951-38-4409-9

T3 - VTT Publications

BT - Curved and cambered glulam beams

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Ranta-Maunus A, Gowda S. Curved and cambered glulam beams: Part 2. Long term load tests under cyclically varying humidity. Espoo: VTT Technical Research Centre of Finland, 1994. 62 p. (VTT Publications; No. 171).