Timber moment frame#

General description#

Description: This is a frame consisting of beams and columns, with strong and rigid beam-to-column connections. Includes frames with very slender walls that do not resist a significant proportion of earthquake load. The frames can be single frames, or multiple bays repeated horizontally and/or vertically. These frames are not infilled with materials like masonry or concrete which would transform their behaviour to that of an infilled frame.

GEM taxonomy: W/LFM+CDL+DUL/H1:6; W/LFM+CDL+DUM/H1:6; W/LFM+CDM+DUL/H1:6; W/LFM+CDM+DUM/H1:6; W/LFM+CDM+DUM/H1:6; W/LFM+CDH+DUM/H1:6; W/LFM+CDH+DUH/H1:6

image

Capacity parameters#

Building class

Yield drift [%]

Ultimate drift [%]

Ty [s]=f(Height [m])

Yield period [s]

W/LFM+CDL+DUL/H1

0.45

1.0

0.122688652*H^0.54

0.21

W/LFM+CDL+DUL/H2

0.45

1.0

0.122688652*H^0.54

0.31

W/LFM+CDL+DUL/H3

0.45

1.0

0.122688652*H^0.54

0.39

W/LFM+CDL+DUL/H4

0.45

1.0

0.122688652*H^0.54

0.45

W/LFM+CDL+DUL/H5

0.45

1.0

0.122688652*H^0.54

0.51

W/LFM+CDL+DUL/H6

0.45

1.0

0.122688652*H^0.54

0.56

W/LFM+CDL+DUM/H1

0.5

1.2

0.122688652*H^0.54

0.21

W/LFM+CDL+DUM/H2

0.5

1.2

0.122688652*H^0.54

0.31

W/LFM+CDL+DUM/H3

0.5

1.2

0.122688652*H^0.54

0.39

W/LFM+CDL+DUM/H4

0.5

1.2

0.122688652*H^0.54

0.45

W/LFM+CDL+DUM/H5

0.5

1.2

0.122688652*H^0.54

0.51

W/LFM+CDL+DUM/H6

0.5

1.2

0.122688652*H^0.54

0.56

W/LFM+CDM+DUL/H1

0.54

1.34

0.122688652*H^0.54

0.21

W/LFM+CDM+DUL/H2

0.54

1.34

0.122688652*H^0.54

0.31

W/LFM+CDM+DUL/H3

0.54

1.34

0.122688652*H^0.54

0.39

W/LFM+CDM+DUL/H4

0.54

1.34

0.122688652*H^0.54

0.45

W/LFM+CDM+DUL/H5

0.54

1.34

0.122688652*H^0.54

0.51

W/LFM+CDM+DUL/H6

0.54

1.34

0.122688652*H^0.54

0.56

W/LFM+CDM+DUM/H1

0.65

1.7

0.122688652*H^0.54

0.21

W/LFM+CDM+DUM/H2

0.65

1.7

0.122688652*H^0.54

0.31

W/LFM+CDM+DUM/H3

0.65

1.7

0.122688652*H^0.54

0.39

W/LFM+CDM+DUM/H4

0.65

1.7

0.122688652*H^0.54

0.45

W/LFM+CDM+DUM/H5

0.65

1.7

0.122688652*H^0.54

0.51

W/LFM+CDM+DUM/H6

0.65

1.7

0.122688652*H^0.54

0.56

W/LFM+CDH+DUM/H1

0.82

1.75

0.122688652*H^0.54

0.21

W/LFM+CDH+DUM/H2

0.82

1.75

0.122688652*H^0.54

0.31

W/LFM+CDH+DUM/H3

0.82

1.75

0.122688652*H^0.54

0.39

W/LFM+CDH+DUM/H4

0.82

1.75

0.122688652*H^0.54

0.45

W/LFM+CDH+DUM/H5

0.82

1.75

0.122688652*H^0.54

0.51

W/LFM+CDH+DUM/H6

0.82

1.75

0.122688652*H^0.54

0.56

W/LFM+CDH+DUH/H1

0.9

2.0

0.122688652*H^0.54

0.21

W/LFM+CDH+DUH/H2

0.9

2.0

0.122688652*H^0.54

0.31

W/LFM+CDH+DUH/H3

0.9

2.0

0.122688652*H^0.54

0.39

W/LFM+CDH+DUH/H4

0.9

2.0

0.122688652*H^0.54

0.45

W/LFM+CDH+DUH/H5

0.9

2.0

0.122688652*H^0.54

0.51

W/LFM+CDH+DUH/H6

0.9

2.0

0.122688652*H^0.54

0.56

Capacity plots#

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References#

A list of references and respective capacity parameters consulted during the definition of GEM’s capacity curves is presented below.

Reference

URL

Yield drift [%]

Ult drift [%]

Ty=f(H) [s]

Villar-Vega et al 2017

https://doi.org/10.1193/010716EQS005M

1

2.5

0.0646H^0.54

FEMA 2020

https://www.fema.gov/sites/default/files/2020-10/fema_hazus_earthquake_technical_manual_4-2.pdf

0.19-0.38

3.43-9.12

0.042*H

Goda and Atkinson 2010

https://doi.org/10.1002/eqe.1068

0.75

1.9

-

Line et al 2008

https://awc.org/wp-content/uploads/2021/12/WDF-2008-SeismicEquivalence-0807.pdf

-

3.3

-

Loss et al 2013

https://doi.org/10.4028/www.scientific.net/AMR.778.486

0.36

1.31

-

Camelo 2003

https://thesis.library.caltech.edu/2524/2/MyThesis_Final.pdf

-

-

0.02*H^0.55

Lang et al 2018

https://doi.org/10.1016/j.jobe.2017.11.022

0.57

2.61

-