Analysis of the Influence of Tension-Compression Stiffness Difference in CFST Members on a 385 m High Long-Span Tower

YU Liang; LI Buhui; ZHU Yi; CAI Jianguo; WANG Yutao

doi:10.3724/j.gyjzG25021303

Volume 56 Issue 7

Jul. 2026

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YU Liang, LI Buhui, ZHU Yi, CAI Jianguo, WANG Yutao. Analysis of the Influence of Tension-Compression Stiffness Difference in CFST Members on a 385 m High Long-Span Tower[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(7): 140-145. doi: 10.3724/j.gyjzG25021303

Citation:

YU Liang, LI Buhui, ZHU Yi, CAI Jianguo, WANG Yutao. Analysis of the Influence of Tension-Compression Stiffness Difference in CFST Members on a 385 m High Long-Span Tower[J]. INDUSTRIAL CONSTRUCTION, 2026, 56(7): 140-145. doi: 10.3724/j.gyjzG25021303

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Analysis of the Influence of Tension-Compression Stiffness Difference in CFST Members on a 385 m High Long-Span Tower

doi: 10.3724/j.gyjzG25021303

1. China Energy Engineering Group, Jiangsu Power Design Institute Co., Ltd., Nanjing 211102, China;
2. School of Civil Engineering, Southeast University, Nanjing 211189, China

Received Date: 2025-02-13
Available Online: 2026-08-31
Publish Date: 2026-07-20

Abstract

Abstract

With increasing demands for crossing capacity and line clearance， the height of long-span transmission towers has risen accordingly. Concrete-filled steel tubular （CFST） structures， which offer advantages such as high bearing capacity， good ductility， strong seismic performance， and ease of construction， are being gradually adopted in the design of long-span transmission towers. Based on the super-high tower used in the 500 kV Fengcheng—Meili project， this study compares calculation results obtained from different finite element software packages and verifies the accuracy of the CFST tower model. The analytical results indicate that if the difference in tensile and compressive stiffness of CFST members is not considered， the design of the tower may be unsafe. To ensure a safe and reliable design， envelope values of internal force calculation results should be derived from both equal-stiffness and unequal-stiffness models.
- long span,
- CFST members,
- tensile stiffness,
- compressive stiffness,
- numerical simulation

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References(12)

References

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