STUDY ON AXIAL COMPRESSION PERFORMANCES OF CONCRETE-ENCASED CONCRETE-FILLED STEEL-TUBE STUB COLUMNS STRENGTHENED WITH EXTERNAL STEEL FRAMES AFTER EXPOSURE TO FIRE

ZHANG Zhengtao; REN Qingxin; REN Debin; YANG Juncai

doi:10.13204/j.gyjzG20011609

Volume 50 Issue 10

Jan. 2021

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2020 > 50(10): 187-193

Andres Quiros Zhang Shuai Cheng Xiaohui, . STUDY OF THE MICP INJECTION IN UNSATURATED SANDY SOILS[J]. INDUSTRIAL CONSTRUCTION, 2015, 45(7): 28-30. doi: 10.13204/j.gyjz201507006

Citation:

ZHANG Zhengtao, REN Qingxin, REN Debin, YANG Juncai. STUDY ON AXIAL COMPRESSION PERFORMANCES OF CONCRETE-ENCASED CONCRETE-FILLED STEEL-TUBE STUB COLUMNS STRENGTHENED WITH EXTERNAL STEEL FRAMES AFTER EXPOSURE TO FIRE[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(10): 187-193. doi: 10.13204/j.gyjzG20011609

Andres Quiros Zhang Shuai Cheng Xiaohui, . STUDY OF THE MICP INJECTION IN UNSATURATED SANDY SOILS[J]. INDUSTRIAL CONSTRUCTION, 2015, 45(7): 28-30. doi: 10.13204/j.gyjz201507006

Citation:

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STUDY ON AXIAL COMPRESSION PERFORMANCES OF CONCRETE-ENCASED CONCRETE-FILLED STEEL-TUBE STUB COLUMNS STRENGTHENED WITH EXTERNAL STEEL FRAMES AFTER EXPOSURE TO FIRE

doi: 10.13204/j.gyjzG20011609

1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2. Liaoning International Engineering Consulting Center Co., Ltd., Shenyang 110014, China

Received Date: 2020-01-16

Abstract

Abstract

Based on verification of fimite element analysis results with relevant experiment data, the axial compression properties of concrete-encased concrete-filled steel tubular (CFST) stub columns at room temperatures, post-fire and strengthened with cladding steel after exposure to fire were studied.The effects of fire exposure time, intervals of batten plate and thickness of cladding steel on the bearing capacity and axial stiffness of specimens were analyzed. The results showed that strengthened with cladding steel, the bearing capacity and stiffness of the specimens were obviously improved, even exceeding the ones of specimens at room temperature. Through parameter analysis, it was found that the degree of reduction for bearing capacity of specimens had experienced a process of increasing first and then decreasing, and the effects of repaired specimens with cladding steel were gradually weakened. The bearing capacity gradually decreased with the increase of intervals of batten plates, but the reduction was small, and the stiffness of specimens was evidently affected. Increasing the thickness of the clading steel could obviously improve the bearing capacity of specimens, and improve their stiffness more significantly.
- external steel clad,
- strengthening,
- post fire,
- concrete-filled steel tubular stub column,
- axial compression property

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References

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