Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams
The influences of variable humidity on the creep behaviors of concrete and the long-term deflections of RC beams are analyzed in this paper. A total of 6 prismatic specimens and 5 RC beams were subjected to sustained loads and 3 types of variable humidity conditions for 331 days. The creep strains o...
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/8301971 |
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| author | Pengfei Li Shiqin He |
| author_facet | Pengfei Li Shiqin He |
| author_sort | Pengfei Li |
| collection | DOAJ |
| description | The influences of variable humidity on the creep behaviors of concrete and the long-term deflections of RC beams are analyzed in this paper. A total of 6 prismatic specimens and 5 RC beams were subjected to sustained loads and 3 types of variable humidity conditions for 331 days. The creep strains of the prismatic specimens and the deflections of the RC beams were recorded to investigate the long-term deformation characteristics. The test results reveal that both the creep strain and the deflection of specimens under cyclic humidity conditions exhibit approximately linear tendencies that are obviously less than those of specimens exposed only to natural air. During certain wetting cycles, the deformation rate became slower and the creep strain even recovered with an increase in the humidity, especially for shorter wetting-drying cycles. Long-term deflections predicted using the CEB-FIP 90 and ACI 209R models were compared with the test results to evaluate the versatility of these current specifications. The findings included rather large errors between the predicted results and experimental data when the average relative humidity was adopted in the analytical models. |
| format | Article |
| id | doaj-art-72818bd869d6492e918fdec1885a9c1d |
| 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-72818bd869d6492e918fdec1885a9c1d2025-02-03T05:53:31ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/83019718301971Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC BeamsPengfei Li0Shiqin He1Department of Harbor, Waterway and Coastal Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaCollege of Civil Engineering, North China University of Technology, Beijing 100144, ChinaThe influences of variable humidity on the creep behaviors of concrete and the long-term deflections of RC beams are analyzed in this paper. A total of 6 prismatic specimens and 5 RC beams were subjected to sustained loads and 3 types of variable humidity conditions for 331 days. The creep strains of the prismatic specimens and the deflections of the RC beams were recorded to investigate the long-term deformation characteristics. The test results reveal that both the creep strain and the deflection of specimens under cyclic humidity conditions exhibit approximately linear tendencies that are obviously less than those of specimens exposed only to natural air. During certain wetting cycles, the deformation rate became slower and the creep strain even recovered with an increase in the humidity, especially for shorter wetting-drying cycles. Long-term deflections predicted using the CEB-FIP 90 and ACI 209R models were compared with the test results to evaluate the versatility of these current specifications. The findings included rather large errors between the predicted results and experimental data when the average relative humidity was adopted in the analytical models.http://dx.doi.org/10.1155/2018/8301971 |
| spellingShingle | Pengfei Li Shiqin He Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams Advances in Civil Engineering |
| title | Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams |
| title_full | Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams |
| title_fullStr | Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams |
| title_full_unstemmed | Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams |
| title_short | Effects of Variable Humidity on the Creep Behavior of Concrete and the Long-Term Deflection of RC Beams |
| title_sort | effects of variable humidity on the creep behavior of concrete and the long term deflection of rc beams |
| url | http://dx.doi.org/10.1155/2018/8301971 |
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