A CALCULATION METHOD OF AXIAL COMPRESSIVE BEARING CAPACITY FOR SHORT SQUARE COLUMNS OF ULTRA-HIGH PERFORMANCE CONCRETE CONFINED BY HIGH-STRENGTH STIRRUPS

YAO Junsuo; DENG Zongcai

doi:10.13204/j.gyjzG19111803

Volume 51 Issue 2

Jun. 2021

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YAO Junsuo, DENG Zongcai. A CALCULATION METHOD OF AXIAL COMPRESSIVE BEARING CAPACITY FOR SHORT SQUARE COLUMNS OF ULTRA-HIGH PERFORMANCE CONCRETE CONFINED BY HIGH-STRENGTH STIRRUPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(2): 26-31. doi: 10.13204/j.gyjzG19111803

Citation:

YAO Junsuo, DENG Zongcai. A CALCULATION METHOD OF AXIAL COMPRESSIVE BEARING CAPACITY FOR SHORT SQUARE COLUMNS OF ULTRA-HIGH PERFORMANCE CONCRETE CONFINED BY HIGH-STRENGTH STIRRUPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(2): 26-31. doi: 10.13204/j.gyjzG19111803

Citation:

YAO Junsuo, DENG Zongcai. A CALCULATION METHOD OF AXIAL COMPRESSIVE BEARING CAPACITY FOR SHORT SQUARE COLUMNS OF ULTRA-HIGH PERFORMANCE CONCRETE CONFINED BY HIGH-STRENGTH STIRRUPS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(2): 26-31. doi: 10.13204/j.gyjzG19111803

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A CALCULATION METHOD OF AXIAL COMPRESSIVE BEARING CAPACITY FOR SHORT SQUARE COLUMNS OF ULTRA-HIGH PERFORMANCE CONCRETE CONFINED BY HIGH-STRENGTH STIRRUPS

doi: 10.13204/j.gyjzG19111803

YAO Junsuo,
DENG Zongcai^,

Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China

Received Date: 2020-05-25
Available Online: 2021-06-04

Abstract

Abstract

To study the calculation method of axial compressive bearing capacity for ultra-high performance concrete (UHPC) square short columns confined by high-strength stirrups. 9 UHPC square short columns confined by stirrups were tested under axial compression, and combined with the collected relevant literature data, the formula for calculating the peak stress of confined UHPC was given on the basis of Richart's failure criterion. And further suggested a calculation formula of axial compression bearing capacity, which was applicable to the high-strength stirrup confined UHPC square short columns with strength of UHPC ranging from 130 MPa to 180 MPa, steel fiber content ranging from 1.5% to 2% and volume stirrup ratio ranging from 1.5% to 5.5%; the suggested formula was compared with the standard formula of China and America. The results showed that the bearing capacity of UHPC predicted by GB 50010-2010 was more conservative than that of ACI 318-2014. The bearing capacity formula considered the effects of steel fiber bridge and stirrup restraint, and the calculated values were in good agreement with the test values. It was suggested to use high-strength stirrup above 600 MPa to restrain UHPC. The upper limit of the stirrup spacing for UHPC square short column confined by non-helical stirrups could be calculated according to GB 50010-2010.
- ultra-high performance concrete (UHPC),
- high-strength stirrup,
- axial compressive bearing capacity,
- short square columns,
- design criterion

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References(22)

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