Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces
Partially concrete-filled steel tubes (PCFSTs) are often used to reduce the dead weight of concrete-filled steel tubes (CFSTs). Most previous studies have focused on the presence or absence of diaphragms directly above the concrete filling of PCFSTs, and few have focused on diaphragm characteristics...
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MDPI AG
2025-03-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/6/863 |
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| author | Yuki Chikahiro Nguyen Thi Hong Huong Seiya Zenzai |
| author_facet | Yuki Chikahiro Nguyen Thi Hong Huong Seiya Zenzai |
| author_sort | Yuki Chikahiro |
| collection | DOAJ |
| description | Partially concrete-filled steel tubes (PCFSTs) are often used to reduce the dead weight of concrete-filled steel tubes (CFSTs). Most previous studies have focused on the presence or absence of diaphragms directly above the concrete filling of PCFSTs, and few have focused on diaphragm characteristics. Therefore, this study presents the parametric analysis of partially concrete-filled steel tubes with circular cross-sections to clarify the effect of the diaphragm’s parameters on the horizontal load capacity. The authors performed pushover analyses for a total of 84 cases, focusing on four axial force ratios, three diaphragm thicknesses, and seven diaphragm opening ratios. Although the thickness of the diaphragm had little effect on the horizontal load capacity, the opening ratio affected the horizontal load capacity. It was found that an opening ratio of 40–80% provided a higher horizontal load capacity than the 20%, 90%, and 95% openings. |
| format | Article |
| id | doaj-art-4771514bc57b417c8eea0ae9040990d8 |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-4771514bc57b417c8eea0ae9040990d82025-08-20T02:11:15ZengMDPI AGBuildings2075-53092025-03-0115686310.3390/buildings15060863Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial ForcesYuki Chikahiro0Nguyen Thi Hong Huong1Seiya Zenzai2Department of Water Environment and Civil Engineering, Shinshu University, Wakasato 4-Chome, Nagano 380-8553, JapanShimizu Corporation, Kyobashi 2-16-1, Tokyo 104-8370, JapanC.E. Management Integrated Laboratory Co., Ltd., Amenomiya 2347-3, Nagano 387-0001, JapanPartially concrete-filled steel tubes (PCFSTs) are often used to reduce the dead weight of concrete-filled steel tubes (CFSTs). Most previous studies have focused on the presence or absence of diaphragms directly above the concrete filling of PCFSTs, and few have focused on diaphragm characteristics. Therefore, this study presents the parametric analysis of partially concrete-filled steel tubes with circular cross-sections to clarify the effect of the diaphragm’s parameters on the horizontal load capacity. The authors performed pushover analyses for a total of 84 cases, focusing on four axial force ratios, three diaphragm thicknesses, and seven diaphragm opening ratios. Although the thickness of the diaphragm had little effect on the horizontal load capacity, the opening ratio affected the horizontal load capacity. It was found that an opening ratio of 40–80% provided a higher horizontal load capacity than the 20%, 90%, and 95% openings.https://www.mdpi.com/2075-5309/15/6/863concrete-filled circular section piershorizontal load capacitydiaphragm |
| spellingShingle | Yuki Chikahiro Nguyen Thi Hong Huong Seiya Zenzai Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces Buildings concrete-filled circular section piers horizontal load capacity diaphragm |
| title | Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces |
| title_full | Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces |
| title_fullStr | Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces |
| title_full_unstemmed | Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces |
| title_short | Effect of Diaphragm Above Concrete-Filled Part on Horizontal Load Capacity of Partially Concrete-Filled Circular Piers Subjected to Axial Forces |
| title_sort | effect of diaphragm above concrete filled part on horizontal load capacity of partially concrete filled circular piers subjected to axial forces |
| topic | concrete-filled circular section piers horizontal load capacity diaphragm |
| url | https://www.mdpi.com/2075-5309/15/6/863 |
| work_keys_str_mv | AT yukichikahiro effectofdiaphragmaboveconcretefilledpartonhorizontalloadcapacityofpartiallyconcretefilledcircularpierssubjectedtoaxialforces AT nguyenthihonghuong effectofdiaphragmaboveconcretefilledpartonhorizontalloadcapacityofpartiallyconcretefilledcircularpierssubjectedtoaxialforces AT seiyazenzai effectofdiaphragmaboveconcretefilledpartonhorizontalloadcapacityofpartiallyconcretefilledcircularpierssubjectedtoaxialforces |