TY - JOUR
T1 - Strength and Plastic Rotation Capacity of I-Shaped Beams with Grid-Purlin System Subjected to Cyclic Loading
AU - Matsui, Ryota
AU - Koizumi, Koichi
AU - Lin, Pao Chun
AU - Iwanaga, Masanobu
AU - Wu, An Chien
AU - Takeuchi, Toru
AU - Tsai, Keh Chuyan
N1 - Funding Information:
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.
Publisher Copyright:
© 2021 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - 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.
AB - 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.
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U2 - 10.1061/(ASCE)ST.1943-541X.0003017
DO - 10.1061/(ASCE)ST.1943-541X.0003017
M3 - Article
AN - SCOPUS:85105787049
SN - 0733-9445
VL - 147
JO - Journal of Structural Engineering (United States)
JF - Journal of Structural Engineering (United States)
IS - 7
M1 - 0003017
ER -