Investigation of fatigue crack propagation behavior in steel fiber-reinforced ultra-high-performance concrete (UHPC) under cyclic flexural loading

Niu, Yanfei; Huang, Haoliang; Wei, Jiangxiong; Jiao, Chujie; Qiang-qiang, Miao

doi:10.1016/j.compstruct.2021.115126

Cited by 37 publications

(19 citation statements)

References 21 publications

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“…The first cracking point is described as the limit of proportionality (LOP) point, the peak point is described as the modulus of rupture (MOR) point, as shown in Figure 5 28 . Given P represents the load strength on bending test process, then if P LOP < P MOR , such phenomenon could be named as deflection hardening.…”

Section: Resultsmentioning

confidence: 99%

Optimization design of functionally graded ultra‐high performance cementitious composite on flexural behavior

Bao

Zhang

Líu

et al. 2022

Structural Concrete

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The research aims to investigate and optimize the flexural behavior of functionally graded ultra‐high performance cementitious composite (FGUHPCC), and to optimize the design of FGUHPCC by using a numerical simulation program named RFPA3D. The equivalent flexural strength and corresponding deflection capacity of double‐ and single‐layered FGUHPCC beams were analyzed by carrying out four‐point bending test. Furthermore, with the numerical model set in RFPA3D, the crack evolution and acoustic emission (AE) event of specimens at limit of proportionality (LOP) point, modulus of rupture (MOR) point, and 30% of MOR are, therefore, discussed. The results indicate that functionally graded design can help to improve the flexural capacity and fracture toughness of all specimens. In addition, the main crack of FGUHPCC looks more irregular and larger damage areas are formed. Higher principal stress and more AE events can be identified in FGUHPCC than that of single‐layer UHPCC. Based on the recorded test data, the influence of bottom layer thickness was also investigated with respect to the peak flexural load and the AE energy. The results indicate that the optimum load capacity and flexural energy can be obtained when layer thickness ratio is about 0.6.

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Section: Resultsmentioning

confidence: 99%

Optimization design of functionally graded ultra‐high performance cementitious composite on flexural behavior

Bao

Zhang

Líu

et al. 2022

Structural Concrete

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“…Most flexural experimental test performed with UHPFRC beams were at material level, without reinforcement. [40][41][42][43][44][45] At the member level there is limited design guidance to deal with reinforced UHPFRC under high cycle fatigue and limited number of experimental test of reinforced UHPFRC reported. For example, Sawicki and Brühwiler 46 show the results of three different T cross-section full scale beams under high cycle fatigue with the longest experimental campaign, in which one specimen was subjected to almost 27 million cycles.…”

Section: Introductionmentioning

confidence: 99%

“…Most flexural experimental test performed with UHPFRC beams were at material level, without reinforcement 40–45 . At the member level there is limited design guidance to deal with reinforced UHPFRC under high cycle fatigue and limited number of experimental test of reinforced UHPFRC reported.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical analysis of cracking and tension stiffening in UHPFRC under high‐cycle fatigue

Sepulveda

Visintin

Sturm

et al. 2023

Structural Concrete

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Tension‐stiffening controls the serviceability behavior of concrete structures as it is responsible for crack formation and, consequently, the deflection of beams. In fiber reinforced concrete, such as ultra‐high performance fiber reinforced concrete (UHPFRC), fibers bridge cracks and thereby transfer tensile stresses across the cracked region, allowing for tensile stresses to be carried by the concrete within the cracked region. Due to structures being designed for longer design lives, the consideration of long‐term effects such as fatigue is required. Much research has examined tension‐stiffening under fatigue when subjected to low cyclic loading, but very little has considered the effects of high‐cycle fatigue, especially for UHPFRC. This paper presents the results of nine UHPFRC tension‐stiffening tests under high‐cycle fatigue in which the crack formation and development under varying cyclic ranges were studied. Specimens were subjected to as many as 5.7 million cycles, and crack readings were taken during each test. The experimental results demonstrate the random nature of cracking on UHPFRC as well as the increase in the crack width under cyclic loads. Finally, this research described the extension of an existing partial‐interaction mechanics model to allow for the stress in the fibers and the increase in crack width due to high cycle fatigue.

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“…Em relação à quantidade de fibras, constatou-se que quanto maior a fração volumétrica, maior a resistência à flexão [11,15,35,41,42] devido ao aumento do efeito de ponte e à redução da distância entre as fibras [41]. No entanto, um aumento excessivo acaba sendo prejudicial devido à aglomeração de fibras e ao intertravamento mecânico [35].…”

Section: Propriedades De Flexãounclassified

“…Outros parâmetros utilizados para analisar o comportamento do concreto sob fadiga seriam a abertura de fissura (crack mouth opening displacement -CMOD) [8][9][10][11],…”

Section: Introductionunclassified

Comportamento À Fadiga Na Flexão Do Concreto De Ultra-Alto Desempenho

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Investigation of fatigue crack propagation behavior in steel fiber-reinforced ultra-high-performance concrete (UHPC) under cyclic flexural loading

Cited by 37 publications

References 21 publications

Optimization design of functionally graded ultra‐high performance cementitious composite on flexural behavior

Optimization design of functionally graded ultra‐high performance cementitious composite on flexural behavior

Experimental and theoretical analysis of cracking and tension stiffening in UHPFRC under high‐cycle fatigue

Comportamento À Fadiga Na Flexão Do Concreto De Ultra-Alto Desempenho

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