Research on the Mechanical Properties and Parameter Influence of Large-Diameter High-Strength Cold-Rolled Rebars

ZHU Jixin; LIN Luyu; LIU Jindou; CUI Chuang

doi:10.3724/j.gyjzG25101603

Volume 55 Issue 11

Nov. 2025

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ZHU Jixin, LIN Luyu, LIU Jindou, CUI Chuang. Research on the Mechanical Properties and Parameter Influence of Large-Diameter High-Strength Cold-Rolled Rebars[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 230-236. doi: 10.3724/j.gyjzG25101603

Citation:

ZHU Jixin, LIN Luyu, LIU Jindou, CUI Chuang. Research on the Mechanical Properties and Parameter Influence of Large-Diameter High-Strength Cold-Rolled Rebars[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(11): 230-236. doi: 10.3724/j.gyjzG25101603

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Research on the Mechanical Properties and Parameter Influence of Large-Diameter High-Strength Cold-Rolled Rebars

doi: 10.3724/j.gyjzG25101603

ZHU Jixin¹,
LIN Luyu¹,
LIU Jindou²,
CUI Chuang^{1,2
,
,}

1. Xiamen Road and Bridge Engineering Investment Development Co., Ltd., Xiamen 361006, China;
2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

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

Abstract

Abstract

Prefabricated bridge piers have been widely used in bridge construction across seas， urban municipal areas， and mountainous regions. Large-diameter threaded rebars， serving as crucial connecting and load-bearing components in prefabricated modules， have been extensively implemented in practical engineering projects. Due to their manufacturing characteristics， these threaded rebars inherently exhibit stress concentration and initial defects at thread roots， with relatively limited research available on their mechanical properties. This study focuses on large-diameter high-strength cold-rolled threaded rebars， investigating the impact of stress concentration effects at thread roots on their service performance. Using finite element methods， the research examined how different thread geometric parameters influence stress concentration and fatigue performance， revealing the relations between thread parameters and mechanical properties， while identifying key influential parameters. Furthermore， the coupled effects of stress concentration and initial defects on fatigue performance were explored. The results demonstrated that the stress concentration factor K_t at thread roots increased with thread base width l and thread angle α. When the fillet radius r was increased from 0.5 mm to 2.5 mm， K_t decreased by approximately 35%. The initial crack inclination angle β did not affect crack propagation direction but significantly influence fatigue life： reducing β from 90° to 45° decreased fatigue life by 28%.
- large-diameter high-strength cold-rolled threaded rebars,
- force analysis,
- parametric influence,
- stress concentration,
- fatigue performance

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References(27)

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