Numerical study of high-strength concrete column confined with high-strength stirrups under axial compression

Based on experimental research on plain concrete columns with high strength concrete core, the formula to predict the bearing capacity of concrete columns with high strength concrete core under axial compression loading was brought forward in previous paper, in order to verify the formula whether right, axial compression test including 3 concrete columns with high strength concrete core and 1 ordinary reinforced concrete column were completed, and the failure characteristic was analyzed additionally. According to experimental results, it can be shown that the failure modes of concrete columns with high strength concrete core are similar to that of ordinary reinforced concrete columns, however, the bearing capacity of concrete columns with high strength concrete core is significant higher compared with that of ordinary reinforced concrete column; the results of the bearing capacity obtained by the formula (2) was in good agreement with the experimental results.

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Study on Axial Compression Test of Fiber Reinforced Ultra-High Strength Concrete Column Confined by High-Strength Reinforcement

Proceedings of the 2016 4th International Conference on Machinery, Materials and Information Technology Applications ◽

10.2991/icmmita-16.2016.42 ◽

2016 ◽

Author(s):

Mingyang Zhang ◽

Xin Tang ◽

Weilun Wang

Keyword(s):

Axial Compression ◽

Compression Test ◽

High Strength Concrete ◽

High Strength ◽

Concrete Column ◽

Fiber Reinforced ◽

Strength Concrete

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Seismic behaviour of prestressed high-strength concrete piles under combined axial compression and cyclic horizontal loads

Advances in Structural Engineering ◽

10.1177/1369433218806191 ◽

2018 ◽

Vol 22 (5) ◽

pp. 1089-1105 ◽

Cited By ~ 2

Author(s):

Xizhi Zhang ◽

Sixin Niu ◽

Jia-Bao Yan ◽

Shaohua Zhang

Keyword(s):

Finite Element ◽

Axial Compression ◽

High Strength Concrete ◽

High Strength ◽

Element Model ◽

Test Results ◽

Seismic Behaviour ◽

Strength Concrete ◽

Concrete Piles ◽

Concrete Pile

In order to simulate the seismic behaviour of the prestressed high-strength concrete piles under working state, six full-scale prestressed high-strength concrete piles were tested under combined axial compression and cyclic horizontal loads. Different axial compression levels and prestressing levels of prestressed tendons were studied in this test programme. The failure mode, bending resistance, displacement ductility, stiffness degradation and energy dissipation of the prestressed high-strength concrete piles under different loading scenarios were measured and analysed. Test results indicated that the axial compression ratio and prestressing level of prestressed tendon significantly influenced the seismic performance of prestressed high-strength concrete piles. Theoretical models were developed to predict cracking, yielding and ultimate bending resistances of the prestressed high-strength concrete pile under combined compression and bending. Finite element model was also developed to simulate the ultimate strength behaviour of the prestressed high-strength concrete pile under combined compression and flexural bending. The accuracies of the theoretical and finite element model were checked through validations of their predictions against the reported test results.

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