Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing

In order to study the fatigue behavior decay law of reinforced concrete structures in cold region under the action of chlorine salt and freeze-thaw, 150-time water freeze-thaw and salt freeze-thaw cycles of reinforced concrete beams were carried out by the quick freezing method, and then the fatigue...

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Main Authors: Jianxi Yang, Tianmei Zhang, Quansheng Sun
Format: Article
Language:English
Published: Hindawi Limited 2020-01-01
Series:Advances in Materials Science and Engineering
Online Access:http://dx.doi.org/10.1155/2020/1032317
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spelling doaj-ac9808c6c988413e8a5c62ac8c9ecd9c2020-11-25T02:47:37ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/10323171032317Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt FreezingJianxi Yang0Tianmei Zhang1Quansheng Sun2School of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaSchool of Civil Engineering, Northeast Forestry University, Harbin 150040, ChinaIn order to study the fatigue behavior decay law of reinforced concrete structures in cold region under the action of chlorine salt and freeze-thaw, 150-time water freeze-thaw and salt freeze-thaw cycles of reinforced concrete beams were carried out by the quick freezing method, and then the fatigue properties of the test beams were obtained by the four-point bending fatigue test. The fatigue life of the test beam without freeze-thaw is 1,074,282 times, and the fatigue life of the test beam after freeze-thaw is reduced; the minimum fatigue life of fatigue failure is 493,972. The test results show that the residual deflection of the test beam is similar to the relative dynamic elastic modulus, which accords with the damage and failure mechanism of concrete, and the growth rate of residual deflection accords with the law of the block model. The fatigue damage model of reinforced concrete specimens is established, the nonlinear fitting of the damage model is carried out according to the test data, the fitting correlation coefficient is more than 0.98, which indicates that the model can better reflect the damage degree of concrete, and the method of predicting the life of in-service concrete beam is put forward in combination with the concrete damage model.http://dx.doi.org/10.1155/2020/1032317
collection DOAJ
language English
format Article
sources DOAJ
author Jianxi Yang
Tianmei Zhang
Quansheng Sun
spellingShingle Jianxi Yang
Tianmei Zhang
Quansheng Sun
Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing
Advances in Materials Science and Engineering
author_facet Jianxi Yang
Tianmei Zhang
Quansheng Sun
author_sort Jianxi Yang
title Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing
title_short Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing
title_full Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing
title_fullStr Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing
title_full_unstemmed Experimental Study on Flexural Fatigue Properties of Reinforced Concrete Beams after Salt Freezing
title_sort experimental study on flexural fatigue properties of reinforced concrete beams after salt freezing
publisher Hindawi Limited
series Advances in Materials Science and Engineering
issn 1687-8434
1687-8442
publishDate 2020-01-01
description In order to study the fatigue behavior decay law of reinforced concrete structures in cold region under the action of chlorine salt and freeze-thaw, 150-time water freeze-thaw and salt freeze-thaw cycles of reinforced concrete beams were carried out by the quick freezing method, and then the fatigue properties of the test beams were obtained by the four-point bending fatigue test. The fatigue life of the test beam without freeze-thaw is 1,074,282 times, and the fatigue life of the test beam after freeze-thaw is reduced; the minimum fatigue life of fatigue failure is 493,972. The test results show that the residual deflection of the test beam is similar to the relative dynamic elastic modulus, which accords with the damage and failure mechanism of concrete, and the growth rate of residual deflection accords with the law of the block model. The fatigue damage model of reinforced concrete specimens is established, the nonlinear fitting of the damage model is carried out according to the test data, the fitting correlation coefficient is more than 0.98, which indicates that the model can better reflect the damage degree of concrete, and the method of predicting the life of in-service concrete beam is put forward in combination with the concrete damage model.
url http://dx.doi.org/10.1155/2020/1032317
work_keys_str_mv AT jianxiyang experimentalstudyonflexuralfatiguepropertiesofreinforcedconcretebeamsaftersaltfreezing
AT tianmeizhang experimentalstudyonflexuralfatiguepropertiesofreinforcedconcretebeamsaftersaltfreezing
AT quanshengsun experimentalstudyonflexuralfatiguepropertiesofreinforcedconcretebeamsaftersaltfreezing
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