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| Ultimate bearing capacity equation and reliability estimation of fiber-reinforced recycled concrete one-way slabs |
| Received:September 12, 2020 Revised:January 15, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20200912001 |
| KeyWord:fiber-reinforced recycled concrete one-way slabs bending limit states coefficient of equivalent rectangular stress area live-dead load effect ratio reliability formula |
| Author | Institution |
| 符勇强 |
福州大学 土木工程学院, 福州 |
| 方圣恩 |
福州大学 土木工程学院, 福州 |
| 林志平 |
福建省高速公路集团有限公司, 福州 |
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| Abstract: |
| Currently there are no reliability formulas for the ultimate bearing capacity of fiber-reinforced concrete (FRC) one-way slabs.First, the coefficient for equivalent rectangular compressive stress was deduced based on the constitutive relation of fiber-reinforced concrete.Second, the statistical features of random variables were determined according to the control factors corresponding to the failure of one-way slabs.Then the bending limit state equation of fiber-reinforced recycled concrete one-way slabs was established.Lastly, the checking point method was incorporated with the limit state equation to derive the reliability formula.The variations of the reliability index of recycled concrete one-way slabs with and without fibers were investigated, together with the influence of the longitudinal reinforcement ratio and the live-dead load effect ratio.The analysis results show that the addition of fibers, as well as the increase of longitudinal reinforcement ratio, can improve the reliability of recycled concrete one-way slabs, while the increase of live-dead load effect ratio reduces the reliability index.The proposed reliability formula can be used as a reference for reliability calculation of fiber-reinforced recycled concrete one-way slabs. |
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