Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns
To prevent brittle failure, the design of a structural column in a seismic-resistant building is of important consideration, particularly in terms of confinement. In the recent building code, the need of closely-spaced stirrups in a structural member, such as column becomes compulsory due to the duc...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Petra Christian University
2009-01-01
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| Series: | Civil Engineering Dimension |
| Subjects: | |
| Online Access: | http://puslit2.petra.ac.id/ejournal/index.php/civ/article/view/16738 |
| _version_ | 1818783184884596736 |
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| author | Recky Tirtajaya Ardiansyah Kusuma Negara Iman Wimbadi Tavio Tavio |
| author_facet | Recky Tirtajaya Ardiansyah Kusuma Negara Iman Wimbadi Tavio Tavio |
| author_sort | Recky Tirtajaya |
| collection | DOAJ |
| description | To prevent brittle failure, the design of a structural column in a seismic-resistant building is of important consideration, particularly in terms of confinement. In the recent building code, the need of closely-spaced stirrups in a structural member, such as column becomes compulsory due to the ductility and strength considerations. However, the design is based on the simplified block stress of unconfined concrete, and does not account for the strength gain due to the presence of confinement. To investigate the effects of lateral confinement on the column capacity, an analytical study is carried out. Both the strength gain in concrete core and the loss of strength in the cover are considered in the analytical models to exhibit the remaining strength gain after the mobilization of strength gain in the core concrete to compensate the loss of strength in the concrete cover. There are six key parameters primarily influence the effectiveness of lateral confinement. The most influencing parameter is found to be the spacing of transverse steel. The presence of closely-spaced lateral confinement significantly increases the magnitude of stress-strain curve of concrete. This increase expands the interaction diagram of the column particularly when it is in the compression-controlled region (for lower-story columns when axial load dominates the behavior). |
| first_indexed | 2024-12-18T13:00:10Z |
| format | Article |
| id | doaj.art-92cc26286a0149da8852de293e40db93 |
| institution | Directory Open Access Journal |
| issn | 1410-9530 1979-570X |
| language | English |
| last_indexed | 2024-12-18T13:00:10Z |
| publishDate | 2009-01-01 |
| publisher | Petra Christian University |
| record_format | Article |
| series | Civil Engineering Dimension |
| spelling | doaj.art-92cc26286a0149da8852de293e40db932022-12-21T21:07:10ZengPetra Christian UniversityCivil Engineering Dimension1410-95301979-570X2009-01-011127888Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete ColumnsRecky TirtajayaArdiansyah Kusuma NegaraIman WimbadiTavio TavioTo prevent brittle failure, the design of a structural column in a seismic-resistant building is of important consideration, particularly in terms of confinement. In the recent building code, the need of closely-spaced stirrups in a structural member, such as column becomes compulsory due to the ductility and strength considerations. However, the design is based on the simplified block stress of unconfined concrete, and does not account for the strength gain due to the presence of confinement. To investigate the effects of lateral confinement on the column capacity, an analytical study is carried out. Both the strength gain in concrete core and the loss of strength in the cover are considered in the analytical models to exhibit the remaining strength gain after the mobilization of strength gain in the core concrete to compensate the loss of strength in the concrete cover. There are six key parameters primarily influence the effectiveness of lateral confinement. The most influencing parameter is found to be the spacing of transverse steel. The presence of closely-spaced lateral confinement significantly increases the magnitude of stress-strain curve of concrete. This increase expands the interaction diagram of the column particularly when it is in the compression-controlled region (for lower-story columns when axial load dominates the behavior).http://puslit2.petra.ac.id/ejournal/index.php/civ/article/view/16738column capacityconfinement effectsinteraction diagramlateral reinforcement |
| spellingShingle | Recky Tirtajaya Ardiansyah Kusuma Negara Iman Wimbadi Tavio Tavio Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns Civil Engineering Dimension column capacity confinement effects interaction diagram lateral reinforcement |
| title | Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns |
| title_full | Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns |
| title_fullStr | Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns |
| title_full_unstemmed | Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns |
| title_short | Effects of Confinement on Interaction Diagrams of Square Reinforced Concrete Columns |
| title_sort | effects of confinement on interaction diagrams of square reinforced concrete columns |
| topic | column capacity confinement effects interaction diagram lateral reinforcement |
| url | http://puslit2.petra.ac.id/ejournal/index.php/civ/article/view/16738 |
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