Investigation into the Prestress Loss and Thermal Expansion Performance of Steel Cables at High Temperature

Sun Guojun; Li Zhihao; Wu JinzhiQu XiushuRen Jingying

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Investigation into the Prestress Loss and Thermal Expansion Performance of Steel Cables at High Temperature

机译：Investigation into the Prestress Loss and Thermal Expansion Performance of Steel Cables at High Temperature

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摘要

This study investigates the prestress loss and thermal expansion performance of steel cables under high temperatures. The calculation formula of cable prestress loss is first deduced theoretically. The prestress loss value of cable under force-thermal coupling is then obtained through numerical simulation and is compared with the calculation results of the theoretical formula. Theoretical deduction is then employed to determine the relationship between the thermal expansion coefficient of the cable and wire in the unstressed state. A numerical analysis model is established to simulate the mechanical properties of the cable in an unstressed state. The results show that the thermal expansion coefficient of the cable in an unstressed state is the same as that of steel wire. Finally, considering that the cable is in the stress state in an actual structure, the high-temperature prestress loss of steel cables under force-thermal coupling is obtained through simulation analysis. The equivalent thermal expansion coefficient is then calculated, and the influence of different twist angles, steel wire layers, initial prestress, section type, and cable length on the equivalent thermal expansion coefficient of steel cables is determined.

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来源
《International journal of steel structures》 |2022年第3期|669-685|共17页
作者
Sun Guojun; Li Zhihao; Wu JinzhiQu XiushuRen Jingying;
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作者单位

Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China|Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China;

Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China;

Beijing Univ Civil Engn & Architecture, Sch Civil & Transportat Engn, Beijing 100044, Peoples R China;

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原文格式 PDF
正文语种英语
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关键词
Steel cable; Prestress loss; Thermal expansion coefficient; Steel wire; Lay length; Twist angle;

Investigation into the Prestress Loss and Thermal Expansion Performance of Steel Cables at High Temperature

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