Experimental investigation on high-temperature creep behavior of carbon fiber reinforced polymer cable

Jiang Zhengwen; Fang Zhi; Fang ChuanLi QuanhaoWang Zhiwei

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Experimental investigation on high-temperature creep behavior of carbon fiber reinforced polymer cable

机译：Experimental investigation on high-temperature creep behavior of carbon fiber reinforced polymer cable

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Both steady state-constant load and temperature (ST-CLT), and transient state-constant load and temperature (TR-CLT) tests were conducted on carbon fiber reinforced polymer (CFRP) cable in order to investigate the corresponding high-temperature creep behavior. The failure modes, creep strains and rupture times of CFRP cables exposed to high temperature were obtained in ST-CLT and TR-CLT tests, while the residual tensile strength and elastic modulus of specimens without rupture after high-temperature creep tests were determined by conducting high-temperature tensile tests. The variation law of high-temperature creep strains and rupture times of CFRP cable obtained from ST-CLT tests were compared to these of TR-CLT tests to identify the effect of temperature-load path. A practical model for characterizing the high-temperature creep behavior of CFRP cable was developed. Finally, the sustained stress levels and rupture times of specimens exposed to high temperature were analyzed to predict the high-temperature creep rupture stress level of CFRP cable. The obtained results indicated that the rupture morphology of high-temperature creep rupture specimens was the completely soft fiber bundles with "fluffy" pattern. The high-temperature creep strains of CFRP cables in ST-CLT and TR-CLT tests were highly depended on temperature, sustained stress level and time. The presence of pre-tension load before heating accelerated the damage of strength and stiffness for CFRP cable at high temperature, and the damage degree increased with the increasing sustained stress level and high-temperature. The developed practical models for CFRP cables under ST-CLT and TR-CLT conditions can accurately predict the high-temperature creep strains. In the fire resistant design of pre-stressed structures with CFRP cables, the effect of hightemperature creep rupture stress of CFRP cable was not negligible.

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来源
《Composite structures》 |2022年第7期|115533.1-115533.15|共15页
作者
Jiang Zhengwen; Fang Zhi; Fang ChuanLi QuanhaoWang Zhiwei;
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作者单位

Hunan Univ, Coll Civil Engn, Key Lab Damage Diag Engn Struct Hunan Prov, Changsha 410082, Hunan, Peoples R China|Changsha Univ Sci & Technol, Key Lab Bridge Engn Safety Control, Dept Educ, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Coll Civil Eng;

Hunan Univ, Coll Civil Engn, Key Lab Damage Diag Engn Struct Hunan Prov, Changsha 410082, Hunan, Peoples R China|Hunan Univ, Coll Civil Engn, Key Lab Wind & Bridge Engn Hunan Prov, Changsha 410082, Hunan, Peoples R China;

Hunan Univ, Coll Civil Engn, Key Lab Wind & Bridge Engn Hunan Prov, Changsha 410082, Hunan, Peoples R ChinaZhongfu Carbon Fiber Core Cable Technol Co Ltd, Lianyungang 222069, Jiangsu, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类
关键词
Carbon fiber reinforced polymer (CFRP); Cable; High temperature; Creep behavior; Residual material properties;

Experimental investigation on high-temperature creep behavior of carbon fiber reinforced polymer cable

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