Experimental Investigation on Columns of Steel Fiber Reinforced Concrete with Recycled Aggregates under Large Eccentric Compression Load

被引：20

作者：

Li, Changyong ^{[1
]}

Geng, Haibin ^{[2
]}

Deng, Caiheng ^{[2
]}

Li, Bingchen ^{[2
]}

Zhao, Shunbo ^{[3
]}

机构：

[1] North China Univ Water Resources & Elect Power, Sch Civil Engn & Commun, Zhengzhou 450045, Henan, Peoples R China

[2] North China Univ Water Resources & Elect Power, Int Joint Res Lab Ecobldg Mat & Engn Henan, Zhengzhou 450045, Henan, Peoples R China

[3] Henan Prov Collaborat Innovat Ctr Water Resources, Zhengzhou 450046, Henan, Peoples R China

来源：

MATERIALS | 2019年 / 12卷 / 03期

关键词：

steel fiber-reinforced concrete with recycled aggregates (SFRC-RA); columns; large eccentric compression load; lateral displacement; crack width; cracking; stiffness; MECHANICAL-PROPERTIES; COARSE AGGREGATE; PERFORMANCE; STRENGTH; SURFACE;

D O I：

10.3390/ma12030445

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To improve the structural application of steel fiber-reinforced concrete with recycled aggregates (SFRC-RA) composited in gradation by large-particle natural coarse aggregate and small-particle recycled coarse aggregate, the large eccentric compression behavior of eight SFRC-RA columns was experimentally investigated in this paper. The main parameters considered were the strength of the SFRC-RA and the volume fraction of the steel fiber. Details about the sectional concrete strain, the longitudinal steel bar strain, the lateral displacement, the cracking load, the crack distribution and crack width, and the ultimate load of the SFRC-RA columns were measured. The beneficial effects of steel fiber on these attributes were discussed, and the ductility corresponding to the lateral displacement of the SFRC-RA columns was also analyzed. Based on the test results and design principles, formulas were proposed for predicting the cracking resistance, crack width, and lateral displacement of SFRC-RA columns in a normal service state. The ultimate loads of the SFRC-RA columns under a large eccentric compression load were calculated, considering the second-order effects.

引用

页数：21

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