Strength and Plastic Rotation Capacity of I-Shaped Beams with Grid-Purlin System Subjected to Cyclic Loading
Publication: Journal of Structural Engineering
Volume 147, Issue 7
Abstract
This paper introduces a grid-purlin system, which was composed of secondary rectangular-hollow-section grids welded onto the top flange of I-shaped beams of moment frames. The welded grid-purlin itself may play a role of a lateral bracing member for the welded beam. However, the ultimate strength, plastic rotation capacity, or other structural characteristics of this grid-purlin system remain poorly understood. This paper presents two full-scale cyclic loading tests on specimens with I-shaped beams 700 mm deep, 240 mm wide, and 13 m long. The diagonal length of grids in the square grid-purlin of the specimen was 1.3 m on-center, and two different depths of the sections were selected for the purlin sections. Both specimens successfully achieved fully plastic moments at a plastic rotation exceeding 0.04 rad. This shows that the grid-purlin system provides reliable lateral bracing. Continuum finite-element (CFE) analysis was performed to simulate the hysteretic experimental response of the grid-purlin system. This CFE model was used to examine the plastic rotation capacity for a variety of combinations of I-shaped beams and grid-purlins.
Formats available
You can view the full content in the following formats:
Data Availability Statement
Some data, computational models, or code generated or used during the study are available from the corresponding author by requests.
Acknowledgments
This research was supported by JST program on Open Innovation Platform with Enterprises, Research Institute of Academia. The authors thank Dr. Ching-Yi Tsai, a Post-doctoral fellow at National Taiwan Universtiy, and staffs in the National Center for Research on Earthquake Engineering, and Architecture and Building Research Institute, Ministry of the Interior in Taiwan, for their contributions to experiments conducted in this research. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflects the views of the sponsors.
References
AIJ (Architectural Institute of Japan). 2012. AIJ recommendations for design of connections in steel structures. Tokyo: AIJ.
AIJ (Architectural Institute of Japan). 2018. AIJ recommendations for stability design of steel structures. Tokyo: AIJ.
AISC. 2016a. Seismic provisions for structural steel buildings. ANSI/AISC 341-16. Chicago: AISC.
AISC. 2016b. Specification for structural steel buildings. ANSI/AISC 360-16. Chicago: AISC.
Bansal, J. P. 1971. “The lateral instability of continuous steel beams.” CESRL dissertation, Dept. of Civil Engineering, Structures Research Laboratory, Univ. of Texas at Austin.
Kimura, Y., Y. Yoshino, and J. Ogawa. 2013. “Effect of lateral-rotational restraint and strength of continuously braces on lateral buckling load for H-shaped beams.” [In Japanese.] J. Struct. Constr. Eng. 78 (683): 193–201. https://doi.org/10.3130/aijs.78.193.
Liu, D., M. Nakashima, and I. Kanao. 2003. “Behavior to complete failure of steel beams subjected to cyclic loading.” Eng. Struct. 25 (5): 525–535. https://doi.org/10.1016/S0141-0296(02)00164-5.
Nakashima, M., I. Kanao, and D. Liu. 2002. “Lateral instability and lateral bracing of steel beams subjected to cyclic loading.” J. Struct. Eng. 128 (10): 1308–1316. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:10(1308).
Okazaki, T., D. Liu, M. Nakashima, and M. D. Engelhardt. 2006. “Stability requirements for beams in seismic steel moment frames.” J. Struct. Eng. 132 (9): 1334–1342. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:9(1334).
Ono, T., and A. Sato. 2000. “Modeling of stress-strain relationships of metallic materials.” [In Japanese.] J. Struct. Constr. Eng. 65 (532): 177–184. https://doi.org/10.3130/aijs.65.177_2.
Takeuchi, T., R. Matsui, K. Koizmumi, P. C. Lin, M. Iwanaga, A. C. Wu, and K. C. Tsai. 2019. “Lateral buckling performance test of roof beam braced with grid-purlin system.” In Proc., 12th Pacific Structural Steel Conf. Tokyo: Japanese Society of Steel Construction.
Yura, J. A. 2001. “Fundamental of beam bracing.” Eng. J. 38 (1): 11–26.
Yura, J. A., T. V. Galambos, and K. Ravindra. 1978. “The bending resistance of steel beams.” J. Struct. Div. 104 (9): 1355–1370. https://doi.org/10.1061/JSDEAG.0004982.
Ziemian, R. D. 2010. Guide to stability design criteria for metal structures. New York: Wiley.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 147 • Issue 7 • July 2021
Copyright
This work is made available under the terms of the Creative Commons Attribution 4.0 International license, https://creativecommons.org/licenses/by/4.0/.
History
Received: Apr 2, 2020
Accepted: Jan 20, 2021
Published online: May 8, 2021
Published in print: Jul 1, 2021
Discussion open until: Oct 8, 2021
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.