Different techniques of steel jacketing for retrofitting of different types of concrete beams after elevated temperature exposure

被引：21

作者：

Aldhafairi, Faisal ^{[1
,2
]}

Hassan, Ahmed ^{[3
,4
]}

Abd-EL-Hafez, L. M. ^{[1
,5
]}

Abouelezz, A. E. Y. ^{[1
]}

机构：

[1] Menia Univ, Dept Civil Engn, Al Minya, Egypt

[2] State Kuwait Minist Interior Kuwait, Kuwait, Kuwait

[3] Beni Suef Univ, Dept Civil Engn, Bani Suwayf, Egypt

[4] Univ Liverpool, Sch Engn, Liverpool, Merseyside, England

[5] Nahda Univ, Dept Civil Engn, Bani Suwayf, Egypt

来源：

STRUCTURES | 2020年 / 28卷

关键词：

Normal; High strength; Self-compacting concrete beam; Elevated temperature; Steel jacket;

D O I：

10.1016/j.istruc.2020.09.017

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Experimental and theoretical programs are designed to investigate the effect of elevated temperature on Normal (NC), high strength (HSC) and self-compacting concrete (SCC) beams. Six steel jacket techniques designed to ass the efficiency of retrofitting after elevated temperature exposure. The more effective jacket was used for different types of concrete beams. Different beams subjected to two levels of temperature 400 degrees C and 600 degrees C for 120 min. The main parameters were steel jacket angels' size, angles orientations and positions while different confinement techniques were fillet welded steel plate and threaded bars. Steel plate retrofitting did not have a significance improvement while steel angels had a good behavior as steel jacketing. The steel jacketing especially four angles improve normal concrete beams by 280% and 160% while improve self-compacting concrete by 290% and 240% after exposed to 400 degrees C and 600 degrees C respectively. The outside orientation of top angels report acceptable behavior for beams capacity restore less than 10%. The welded plates have good results than bolts in this study.

引用

页码：713 / 725

页数：13

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