Modified Three-Parameter Power Model to Predict  Moment-Rotation Curve of Top- and Seat-Angle Connection

Ali Ahmed; Norimitsu Kishi

doi:doi:10.11648/j.ajce.20170501.17

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Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection

Ali Ahmed, Norimitsu Kishi

Published in American Journal of Civil Engineering (Volume 5, Issue 1)

Received: 4 December 2016 Accepted: 15 December 2016 Published: 18 January 2017

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Abstract

This study conducted on improving three-parameter power model [1] to estimate ultimate moment of connections based on the failure mechanisms developed by more practical means and finally, to predict moment-rotation relations of top- and seat-angle connections for intrinsic replacement of experimental curves and/or finite element (FE) analysis results. Bolt stiffness, shear and bending deformation of tension angle and prying force acted on tension angle are considered to determine the ultimate moment of connections implementing two possible failure mechanisms. These failure mechanisms are developed based on the concept of T-stub model [2] and adjusted the position of plastic hinges applying advanced FE analysis method [3-6]. Then, moment-rotation (M_r) characteristics of top- and seat-angle connections are constructed applying proposed modified three-parameter power model. Applicability of the proposed formulation is examined by comparing M_r curves and ultimate moment capacities with those of Kishi-Chen power model, FE analyses [3, 4] and experiments [7, 8]. The comparison implies that proposed formulation and Kishi-Chen’s method both achieved closer approximation for maximum of cases and better accuracy for the modified cases to drive M_r curves of the connections; but ultimate moments of the connections defined by the proposed method is more realistic than that predicted by Kishi-Chen power model.

Published in	American Journal of Civil Engineering (Volume 5, Issue 1)
DOI	10.11648/j.ajce.20170501.17
Page(s)	50-59
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Moment-Rotation Relation, Prying Action, Ultimate Moment, Initial Stiffness, Failure Mechanism, Top- and Seat-Angle Connection

References

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APA Style

Ali Ahmed, Norimitsu Kishi. (2017). Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection. American Journal of Civil Engineering, 5(1), 50-59. https://doi.org/10.11648/j.ajce.20170501.17

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ACS Style

Ali Ahmed; Norimitsu Kishi. Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection. Am. J. Civ. Eng. 2017, 5(1), 50-59. doi: 10.11648/j.ajce.20170501.17

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AMA Style

Ali Ahmed, Norimitsu Kishi. Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection. Am J Civ Eng. 2017;5(1):50-59. doi: 10.11648/j.ajce.20170501.17

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@article{10.11648/j.ajce.20170501.17,
  author = {Ali Ahmed and Norimitsu Kishi},
  title = {Modified Three-Parameter Power Model to Predict  Moment-Rotation Curve of Top- and Seat-Angle Connection},
  journal = {American Journal of Civil Engineering},
  volume = {5},
  number = {1},
  pages = {50-59},
  doi = {10.11648/j.ajce.20170501.17},
  url = {https://doi.org/10.11648/j.ajce.20170501.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20170501.17},
  abstract = {This study conducted on improving three-parameter power model [1] to estimate ultimate moment of connections based on the failure mechanisms developed by more practical means and finally, to predict moment-rotation relations of top- and seat-angle connections for intrinsic replacement of experimental curves and/or finite element (FE) analysis results. Bolt stiffness, shear and bending deformation of tension angle and prying force acted on tension angle are considered to determine the ultimate moment of connections implementing two possible failure mechanisms. These failure mechanisms are developed based on the concept of T-stub model [2] and adjusted the position of plastic hinges applying advanced FE analysis method [3-6]. Then, moment-rotation (Mr) characteristics of top- and seat-angle connections are constructed applying proposed modified three-parameter power model. Applicability of the proposed formulation is examined by comparing Mr curves and ultimate moment capacities with those of Kishi-Chen power model, FE analyses [3, 4] and experiments [7, 8]. The comparison implies that proposed formulation and Kishi-Chen’s method both achieved closer approximation for maximum of cases and better accuracy for the modified cases to drive Mr curves of the connections; but ultimate moments of the connections defined by the proposed method is more realistic than that predicted by Kishi-Chen power model.},
 year = {2017}
}

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TY  - JOUR
T1  - Modified Three-Parameter Power Model to Predict  Moment-Rotation Curve of Top- and Seat-Angle Connection
AU  - Ali Ahmed
AU  - Norimitsu Kishi
Y1  - 2017/01/18
PY  - 2017
N1  - https://doi.org/10.11648/j.ajce.20170501.17
DO  - 10.11648/j.ajce.20170501.17
T2  - American Journal of Civil Engineering
JF  - American Journal of Civil Engineering
JO  - American Journal of Civil Engineering
SP  - 50
EP  - 59
PB  - Science Publishing Group
SN  - 2330-8737
UR  - https://doi.org/10.11648/j.ajce.20170501.17
AB  - This study conducted on improving three-parameter power model [1] to estimate ultimate moment of connections based on the failure mechanisms developed by more practical means and finally, to predict moment-rotation relations of top- and seat-angle connections for intrinsic replacement of experimental curves and/or finite element (FE) analysis results. Bolt stiffness, shear and bending deformation of tension angle and prying force acted on tension angle are considered to determine the ultimate moment of connections implementing two possible failure mechanisms. These failure mechanisms are developed based on the concept of T-stub model [2] and adjusted the position of plastic hinges applying advanced FE analysis method [3-6]. Then, moment-rotation (Mr) characteristics of top- and seat-angle connections are constructed applying proposed modified three-parameter power model. Applicability of the proposed formulation is examined by comparing Mr curves and ultimate moment capacities with those of Kishi-Chen power model, FE analyses [3, 4] and experiments [7, 8]. The comparison implies that proposed formulation and Kishi-Chen’s method both achieved closer approximation for maximum of cases and better accuracy for the modified cases to drive Mr curves of the connections; but ultimate moments of the connections defined by the proposed method is more realistic than that predicted by Kishi-Chen power model.
VL  - 5
IS  - 1
ER  -

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Author Information

Ali Ahmed

Department of Civil Engineering, Stamford University Bangladesh, Dhaka, Bangladesh
Norimitsu Kishi

Kushiro National College of Technology, Otanoshike, Kushiro, Japan

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APA Style

Ali Ahmed, Norimitsu Kishi. (2017). Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection. American Journal of Civil Engineering, 5(1), 50-59. https://doi.org/10.11648/j.ajce.20170501.17

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ACS Style

Ali Ahmed; Norimitsu Kishi. Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection. Am. J. Civ. Eng. 2017, 5(1), 50-59. doi: 10.11648/j.ajce.20170501.17

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AMA Style

Ali Ahmed, Norimitsu Kishi. Modified Three-Parameter Power Model to Predict Moment-Rotation Curve of Top- and Seat-Angle Connection. Am J Civ Eng. 2017;5(1):50-59. doi: 10.11648/j.ajce.20170501.17

Copy | Download

@article{10.11648/j.ajce.20170501.17,
  author = {Ali Ahmed and Norimitsu Kishi},
  title = {Modified Three-Parameter Power Model to Predict  Moment-Rotation Curve of Top- and Seat-Angle Connection},
  journal = {American Journal of Civil Engineering},
  volume = {5},
  number = {1},
  pages = {50-59},
  doi = {10.11648/j.ajce.20170501.17},
  url = {https://doi.org/10.11648/j.ajce.20170501.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajce.20170501.17},
  abstract = {This study conducted on improving three-parameter power model [1] to estimate ultimate moment of connections based on the failure mechanisms developed by more practical means and finally, to predict moment-rotation relations of top- and seat-angle connections for intrinsic replacement of experimental curves and/or finite element (FE) analysis results. Bolt stiffness, shear and bending deformation of tension angle and prying force acted on tension angle are considered to determine the ultimate moment of connections implementing two possible failure mechanisms. These failure mechanisms are developed based on the concept of T-stub model [2] and adjusted the position of plastic hinges applying advanced FE analysis method [3-6]. Then, moment-rotation (Mr) characteristics of top- and seat-angle connections are constructed applying proposed modified three-parameter power model. Applicability of the proposed formulation is examined by comparing Mr curves and ultimate moment capacities with those of Kishi-Chen power model, FE analyses [3, 4] and experiments [7, 8]. The comparison implies that proposed formulation and Kishi-Chen’s method both achieved closer approximation for maximum of cases and better accuracy for the modified cases to drive Mr curves of the connections; but ultimate moments of the connections defined by the proposed method is more realistic than that predicted by Kishi-Chen power model.},
 year = {2017}
}

Copy | Download

TY  - JOUR
T1  - Modified Three-Parameter Power Model to Predict  Moment-Rotation Curve of Top- and Seat-Angle Connection
AU  - Ali Ahmed
AU  - Norimitsu Kishi
Y1  - 2017/01/18
PY  - 2017
N1  - https://doi.org/10.11648/j.ajce.20170501.17
DO  - 10.11648/j.ajce.20170501.17
T2  - American Journal of Civil Engineering
JF  - American Journal of Civil Engineering
JO  - American Journal of Civil Engineering
SP  - 50
EP  - 59
PB  - Science Publishing Group
SN  - 2330-8737
UR  - https://doi.org/10.11648/j.ajce.20170501.17
AB  - This study conducted on improving three-parameter power model [1] to estimate ultimate moment of connections based on the failure mechanisms developed by more practical means and finally, to predict moment-rotation relations of top- and seat-angle connections for intrinsic replacement of experimental curves and/or finite element (FE) analysis results. Bolt stiffness, shear and bending deformation of tension angle and prying force acted on tension angle are considered to determine the ultimate moment of connections implementing two possible failure mechanisms. These failure mechanisms are developed based on the concept of T-stub model [2] and adjusted the position of plastic hinges applying advanced FE analysis method [3-6]. Then, moment-rotation (Mr) characteristics of top- and seat-angle connections are constructed applying proposed modified three-parameter power model. Applicability of the proposed formulation is examined by comparing Mr curves and ultimate moment capacities with those of Kishi-Chen power model, FE analyses [3, 4] and experiments [7, 8]. The comparison implies that proposed formulation and Kishi-Chen’s method both achieved closer approximation for maximum of cases and better accuracy for the modified cases to drive Mr curves of the connections; but ultimate moments of the connections defined by the proposed method is more realistic than that predicted by Kishi-Chen power model.
VL  - 5
IS  - 1
ER  -

Copy | Download