Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors
Currently, the robustness of precast reinforced concrete frames is attracting wide attention. However, avoiding “strong beams and weak columns” during strengthening against progressive collapse is a key problem. To discuss this problem, an experimental study on two 1/2-scale precast frame subassembl...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/8098242 |
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| author | Jianwu Pan Xian Wang Fang Wu |
| author_facet | Jianwu Pan Xian Wang Fang Wu |
| author_sort | Jianwu Pan |
| collection | DOAJ |
| description | Currently, the robustness of precast reinforced concrete frames is attracting wide attention. However, avoiding “strong beams and weak columns” during strengthening against progressive collapse is a key problem. To discuss this problem, an experimental study on two 1/2-scale precast frame subassemblages under a pushdown loading regime was carried out in this paper. One specimen was strengthened with carbon fibre-reinforced polymer (CFRP) sheets on the beam sides. The middle parts of the CFRP sheets were anchored with hybrid fibre-reinforced polymer (HFRP) anchors. Another specimen was not strengthened. The failure mechanisms, failure modes, and strengthening effect are discussed. The strengthening effect is very obvious in the early catenary action stage. No shearing failure develops on HFRP anchors, which proves that the anchoring method is effective. Based on the experimental results, analytical models and preventive strengthening design and construction measures to mitigate progressive collapse of the precast RC frame are proposed. |
| format | Article |
| id | doaj-art-06d3a507622640ad9d0b485789038c52 |
| 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-06d3a507622640ad9d0b485789038c522025-02-03T05:49:37ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/80982428098242Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP AnchorsJianwu Pan0Xian Wang1Fang Wu2Department of Civil Engineering, College of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, ChinaDepartment of Civil Engineering, College of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, ChinaDepartment of Civil Engineering, College of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, ChinaCurrently, the robustness of precast reinforced concrete frames is attracting wide attention. However, avoiding “strong beams and weak columns” during strengthening against progressive collapse is a key problem. To discuss this problem, an experimental study on two 1/2-scale precast frame subassemblages under a pushdown loading regime was carried out in this paper. One specimen was strengthened with carbon fibre-reinforced polymer (CFRP) sheets on the beam sides. The middle parts of the CFRP sheets were anchored with hybrid fibre-reinforced polymer (HFRP) anchors. Another specimen was not strengthened. The failure mechanisms, failure modes, and strengthening effect are discussed. The strengthening effect is very obvious in the early catenary action stage. No shearing failure develops on HFRP anchors, which proves that the anchoring method is effective. Based on the experimental results, analytical models and preventive strengthening design and construction measures to mitigate progressive collapse of the precast RC frame are proposed.http://dx.doi.org/10.1155/2018/8098242 |
| spellingShingle | Jianwu Pan Xian Wang Fang Wu Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors Advances in Civil Engineering |
| title | Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors |
| title_full | Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors |
| title_fullStr | Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors |
| title_full_unstemmed | Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors |
| title_short | Strengthening of Precast RC Frame to Mitigate Progressive Collapse by Externally Bonded CFRP Sheets Anchored with HFRP Anchors |
| title_sort | strengthening of precast rc frame to mitigate progressive collapse by externally bonded cfrp sheets anchored with hfrp anchors |
| url | http://dx.doi.org/10.1155/2018/8098242 |
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