Investigation of Spatial TT-Joints Reinforced with Collar Plates Under Axial Compression

LI Kangshuai; SHAO Yongbo; CHEN Junlei; XU Yingjie; ZHANG Hanyi; DONG Zhiyou; FENG Qiyu

doi:10.3724/j.gyjzG23101609

Volume 55 Issue 11

Nov. 2025

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LI Kangshuai, SHAO Yongbo, CHEN Junlei, XU Yingjie, ZHANG Hanyi, DONG Zhiyou, FENG Qiyu. Investigation of Spatial TT-Joints Reinforced with Collar Plates Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 106-114. doi: 10.3724/j.gyjzG23101609

Citation:

LI Kangshuai, SHAO Yongbo, CHEN Junlei, XU Yingjie, ZHANG Hanyi, DONG Zhiyou, FENG Qiyu. Investigation of Spatial TT-Joints Reinforced with Collar Plates Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 106-114. doi: 10.3724/j.gyjzG23101609

Citation:

LI Kangshuai, SHAO Yongbo, CHEN Junlei, XU Yingjie, ZHANG Hanyi, DONG Zhiyou, FENG Qiyu. Investigation of Spatial TT-Joints Reinforced with Collar Plates Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 106-114. doi: 10.3724/j.gyjzG23101609

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Investigation of Spatial TT-Joints Reinforced with Collar Plates Under Axial Compression

doi: 10.3724/j.gyjzG23101609

1. School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China;
2. School of Architecture and Civil Engineering, Xihua University, Chengdu 610500, China;
3. Gas Company of Southwest Oil & Gasfield Company PetroChina, Chengdu 610500, China

Received Date: 2023-10-16
Available Online: 2026-01-06
Publish Date: 2025-11-20

Abstract

Abstract

To study the bearing capacity of spatial TT-joints reinforced with collar plates under axial compression， experimental tests were conducted on one unreinforced spatial TT-joint and one collar plate-reinforced spatial TT-joint， respectively. The failure mode and the bearing capacity were studied； based on this， finite element models of spatial TT-joints reinforced with collar plates were established， and then a parametric analysis was conducted. The research showed that reinforcing with collar plates improved the bearing capacity of spatial TT-joints； the length of the collar plate had no effect on the bearing capacity of the joints； the main influencing factors of bearing capacity in spatial TT-joints included the brace-to-chord diameter ratio β， the chord diameter-to-twice chord wall thickness ratio γ， the brace wall thickness-to-chord wall thickness ratio τ， and the collar plate thickness-to-chord wall thickness ratio τ_c； the parameter τ affected the failure modes of the joints. The calculation formula for the bearing capacity of spatial TT-joints reinforced with collar plates under chord plastic failure was proposed using the multiple linear regression method.
- collar plate reinforcement,
- spatial TT-joints,
- experimental tests,
- bearing capacity,
- failure modes,
- finite element

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References(24)

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