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A new strut model for solid masonry infills in steel frames

Yekrangnia, Mohammad / Mohammadi, Majid

Highlights•A single model is proposed in this paper to consider both local and global effects of infill panels on structures.•The model can also consider nonlinear behavior of infills accurately.•The proposed three-strut model considers strut width, angle and contact length as variables by parameters including relative stiffness of frame to infill wall, friction angle between masonry blocks and infilled frame height to length ratio.

AbstractThis paper presents in-depth results of a proposed strut model for masonry infill walls in moment-resisting steel frames. The proposed model is based on the results of calibrated finite element analyses and hence gives realistic representation of infilled frames behavior. Comparisons are made between the results of the proposed model and other existing strut models; ASCE beam-to-beam, ASCE column-to-column and El-Dakhakhni. The results prove that considerable improvement has been made in capturing the internal forces of the frame members and force-displacement diagram of infilled frames by the new model compared to the existing models. Robustness of the proposed model is also confirmed in predicting performance of several experimental results of infill walls in steel frames.The model can be observed in the following figure:

a_{P} = 0.001 a_{M} (6 θ + 7.5 α_{p}) θ and α_{p} in degrees

L_{ceff - p} = 0.006 h (θ + α_{p} - 10 λ_{l} h) θ and α_{p} in degrees

α ≅ \tan^{- 1} \frac{1}{μ}

α_{p} = α - λ_{l} h α_{p} and α in degrees

aM is Mainstone proposed strut model and μ is coefficient of friction between bricks of the wall.

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A new strut model for solid masonry infills in steel frames

Yekrangnia, Mohammad / Mohammadi, Majid

Highlights•A single model is proposed in this paper to consider both local and global effects of infill panels on structures.•The model can also consider nonlinear behavior of infills accurately.•The proposed three-strut model considers strut width, angle and contact length as variables by parameters including relative stiffness of frame to infill wall, friction angle between masonry blocks and infilled frame height to length ratio.

AbstractThis paper presents in-depth results of a proposed strut model for masonry infill walls in moment-resisting steel frames. The proposed model is based on the results of calibrated finite element analyses and hence gives realistic representation of infilled frames behavior. Comparisons are made between the results of the proposed model and other existing strut models; ASCE beam-to-beam, ASCE column-to-column and El-Dakhakhni. The results prove that considerable improvement has been made in capturing the internal forces of the frame members and force-displacement diagram of infilled frames by the new model compared to the existing models. Robustness of the proposed model is also confirmed in predicting performance of several experimental results of infill walls in steel frames.The model can be observed in the following figure:

a_{P} = 0.001 a_{M} (6 θ + 7.5 α_{p}) θ and α_{p} in degrees

L_{ceff - p} = 0.006 h (θ + α_{p} - 10 λ_{l} h) θ and α_{p} in degrees

α ≅ \tan^{- 1} \frac{1}{μ}

α_{p} = α - λ_{l} h α_{p} and α in degrees

aM is Mainstone proposed strut model and μ is coefficient of friction between bricks of the wall.

A new strut model for solid masonry infills in steel frames

Yekrangnia, Mohammad / Mohammadi, Majid

Highlights•A single model is proposed in this paper to consider both local and global effects of infill panels on structures.•The model can also consider nonlinear behavior of infills accurately.•The proposed three-strut model considers strut width, angle and contact length as variables by parameters including relative stiffness of frame to infill wall, friction angle between masonry blocks and infilled frame height to length ratio.

AbstractThis paper presents in-depth results of a proposed strut model for masonry infill walls in moment-resisting steel frames. The proposed model is based on the results of calibrated finite element analyses and hence gives realistic representation of infilled frames behavior. Comparisons are made between the results of the proposed model and other existing strut models; ASCE beam-to-beam, ASCE column-to-column and El-Dakhakhni. The results prove that considerable improvement has been made in capturing the internal forces of the frame members and force-displacement diagram of infilled frames by the new model compared to the existing models. Robustness of the proposed model is also confirmed in predicting performance of several experimental results of infill walls in steel frames.The model can be observed in the following figure:

a_{P} = 0.001 a_{M} (6 θ + 7.5 α_{p}) θ and α_{p} in degrees

L_{ceff - p} = 0.006 h (θ + α_{p} - 10 λ_{l} h) θ and α_{p} in degrees

α ≅ \tan^{- 1} \frac{1}{μ}

α_{p} = α - λ_{l} h α_{p} and α in degrees

aM is Mainstone proposed strut model and μ is coefficient of friction between bricks of the wall.

Access

Check availability in my library

Order at Subito €

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Title:

A new strut model for solid masonry infills in steel frames

Contributors:

Yekrangnia, Mohammad (author) / Mohammadi, Majid (author)

Published in:

Engineering Structures ; 135 ; 222-235

Publication date:

2016-10-25

Size:

14 pages

ISSN:

DOI:

https://doi.org/10.1016/j.engstruct.2016.10.048

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

URM infill walls , Moment-resisting steel frames , Equivalent strut model , Infill-frame interaction forces , Frame internal forces

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