Degradation and Mechanism of the Mechanics and Durability of Reinforced Concrete Slab in A Marine Environment

An experimental research was conducted to determine the corrosion and bearing capacity of a reinforced concrete（RC） slab at different ages in a marine environment.Results show that the development of corrosion-induced cracks on a slab in a marine environment can be divided into three stages accordin...

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Bibliographic Details
Published inChina ocean engineering Vol. 30; no. 2; pp. 257 - 270
Main Author 吴胜兴 刘冠国 卞汉兵 吕维波 蒋建华
Format Journal Article
LanguageEnglish
Published Nanjing Chinese Ocean Engineering Society 01.04.2016
Haiyang Chubanshe
Subjects
Civil Engineering
Coastal Sciences
Engineering
Engineering Sciences
Fluid- and Aerodynamics
Marine & Freshwater Sciences
Materials
Numerical and Computational Physics
Oceanography
Offshore Engineering
Simulation
力学性能
抗弯承载力
海洋环境
混凝土结构设计
耐久性
裂缝宽度
退化机理
钢筋混凝土板
corrosion
deflection
marine environment
RC slab
bearing capacity
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Summary:An experimental research was conducted to determine the corrosion and bearing capacity of a reinforced concrete（RC） slab at different ages in a marine environment.Results show that the development of corrosion-induced cracks on a slab in a marine environment can be divided into three stages according to crack morphology at the bottom of the slab.In the first stage,cracks appear.In the second stage,cracks develop from the edges to the middle of the slab.In the third stage,longitudinal and transverse corrosion-induced cracks coexist.The corrosion ratio of reinforcements nonlinearly increases with the age,and the relationship between the corrosion ratio of the reinforcements and the corrosion-induced crack width of the concrete is established.The flexural capacity of the corroded RC slab nonlinearly decreases with the age,and the model for the bearing capacity factor of the corroded RC slab is established.The mid-span deflection of the corroded RC slab that corresponds to the yield of the reinforcements linearly increases with the increase in corrosion ratio.Finally,the mechanisms of corrosion morphology and the degradation of the mechanical properties of an RC slab in a marine environment are discussed on the basis of the basic theories of steel corrosion in concrete and concrete structure design.
Bibliography:WU Sheng-xing;LIU Guan-guo;BIAN Han-bing;LV Wei-bo;JIANG Jian-hua（ a College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China b Jiangsu Engineering Research Center for Cracking Control of Building, Hohai University, Nanjing 210098, China e Jiangsu Transportation Research Institute Co. Ltd., Nanjing 211112, China d Laboratoire LEM3 （UMR CNRS 7239）, Universitd de Lorraine, Ile du Saulcy, 57045 Metz Cedex 01, France e Nanjing City-Town Architecture Design ＆ Consultants Co. Ltd., Nanjing 210009, China）
32-1441/P
An experimental research was conducted to determine the corrosion and bearing capacity of a reinforced concrete（RC） slab at different ages in a marine environment.Results show that the development of corrosion-induced cracks on a slab in a marine environment can be divided into three stages according to crack morphology at the bottom of the slab.In the first stage,cracks appear.In the second stage,cracks develop from the edges to the middle of the slab.In the third stage,longitudinal and transverse corrosion-induced cracks coexist.The corrosion ratio of reinforcements nonlinearly increases with the age,and the relationship between the corrosion ratio of the reinforcements and the corrosion-induced crack width of the concrete is established.The flexural capacity of the corroded RC slab nonlinearly decreases with the age,and the model for the bearing capacity factor of the corroded RC slab is established.The mid-span deflection of the corroded RC slab that corresponds to the yield of the reinforcements linearly increases with the increase in corrosion ratio.Finally,the mechanisms of corrosion morphology and the degradation of the mechanical properties of an RC slab in a marine environment are discussed on the basis of the basic theories of steel corrosion in concrete and concrete structure design.
marine environment; RC slab; corrosion; bearing capacity; deflection
ISSN:0890-5487
2191-8945
DOI:10.1007/s13344-016-0016-8