Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression
This paper presented a comparative study of concrete-filled steel tubular (CFST) stub columns with three different confinement types from carbon fiber reinforced polymer (CFRP): outer circular CFRP, inner circular CFRP, and outer square CFRP. The compressive mechanism and physical properties of the...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/7109061 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849309309602627584 |
|---|---|
| author | Ying Guo Yufen Zhang |
| author_facet | Ying Guo Yufen Zhang |
| author_sort | Ying Guo |
| collection | DOAJ |
| description | This paper presented a comparative study of concrete-filled steel tubular (CFST) stub columns with three different confinement types from carbon fiber reinforced polymer (CFRP): outer circular CFRP, inner circular CFRP, and outer square CFRP. The compressive mechanism and physical properties of the composite column were analyzed firstly aiming at investigating the confinement effect of CFRP. Ultimate axial bearing capacity of these three CFRP-confined CFST columns was calculated based on Unified Theory of CFST and elastoplastic limit equilibrium theory, respectively. Meanwhile, the corresponding tests are adopted to validate the feasibility of the two calculation models. Through data analysis, the study confirmed the ultimate strength calculation results of the limit equilibrium method were found to be more reliable and approximate to the test results than those of Unified Theory of CFST. Then axial bearing capacity of the pure CFST column was predicted to evaluate the bearing capacity enhancement ratio of the three types of composite columns. It was demonstrated that the averaged enhancement ratio is 16.4 percent, showing that CFRP-confined CFST columns had a broad engineering applicability. Through a comparative analysis, this study also confirmed that outer circular CFRP had the best confinement effect and outer square CFRP did better than inner circular CFRP. The confinement effect of CFRP increased with the decrease of concrete strength, and it was proportional with relative proportions of CFRP and steel under the same concrete strength. |
| format | Article |
| id | doaj-art-11c003a8a9984cefbe5f32b149680f96 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-11c003a8a9984cefbe5f32b149680f962025-08-20T03:54:12ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/71090617109061Comparative Study of CFRP-Confined CFST Stub Columns under Axial CompressionYing Guo0Yufen Zhang1School of Civil Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, ChinaThis paper presented a comparative study of concrete-filled steel tubular (CFST) stub columns with three different confinement types from carbon fiber reinforced polymer (CFRP): outer circular CFRP, inner circular CFRP, and outer square CFRP. The compressive mechanism and physical properties of the composite column were analyzed firstly aiming at investigating the confinement effect of CFRP. Ultimate axial bearing capacity of these three CFRP-confined CFST columns was calculated based on Unified Theory of CFST and elastoplastic limit equilibrium theory, respectively. Meanwhile, the corresponding tests are adopted to validate the feasibility of the two calculation models. Through data analysis, the study confirmed the ultimate strength calculation results of the limit equilibrium method were found to be more reliable and approximate to the test results than those of Unified Theory of CFST. Then axial bearing capacity of the pure CFST column was predicted to evaluate the bearing capacity enhancement ratio of the three types of composite columns. It was demonstrated that the averaged enhancement ratio is 16.4 percent, showing that CFRP-confined CFST columns had a broad engineering applicability. Through a comparative analysis, this study also confirmed that outer circular CFRP had the best confinement effect and outer square CFRP did better than inner circular CFRP. The confinement effect of CFRP increased with the decrease of concrete strength, and it was proportional with relative proportions of CFRP and steel under the same concrete strength.http://dx.doi.org/10.1155/2018/7109061 |
| spellingShingle | Ying Guo Yufen Zhang Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression Advances in Civil Engineering |
| title | Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression |
| title_full | Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression |
| title_fullStr | Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression |
| title_full_unstemmed | Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression |
| title_short | Comparative Study of CFRP-Confined CFST Stub Columns under Axial Compression |
| title_sort | comparative study of cfrp confined cfst stub columns under axial compression |
| url | http://dx.doi.org/10.1155/2018/7109061 |
| work_keys_str_mv | AT yingguo comparativestudyofcfrpconfinedcfststubcolumnsunderaxialcompression AT yufenzhang comparativestudyofcfrpconfinedcfststubcolumnsunderaxialcompression |