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عنوان فارسی مقاله:
آسیب فرسودگی فشاری و مکانیزم شکست فیبر مواد سیمانی با انعطاف پذیری بالا تقویت شده
عنوان انگلیسی مقاله:
Compressive fatigue damage and failure mechanism of fiber reinforced cementitious material with high ductility
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Fiber reinforced concrete is made by adding fibers into concrete matrix to improve its ductility. With fiber reinforced concrete widely applied in modern complicated structures, which is subjected to repetitive cyclic loads (e.g. automobile traffic, wind action and sea waves), the fatigue behavior of this material is also getting more and more attention. Numerous experiments have been conducted to study the fatigue behavior of fiber reinforced concrete [1–8]. Fiber reinforced cementitious material with high ductility is a kind of cementitious material reinforced by random distributed short fibers, which is also referred to as engineered cementitious composites (ECC) [9], strain hardening cementitious composites (SHCC) [10], polyvinyl alcohol (PVA) fiber reinforced cementitious composites (PVA-FRCC) [11], or ultra-high toughness cementitious composites (UHTCC) [12], and its use has been explored throughout the world. This material was proposed by Li and Leung and was designed with micromechanical principles [13]. UHTCC possesses the following characteristics: it is reinforced with short fibers with the corresponding volume fraction lower than 2.5%; the hardened composite exhibits significant pseudo strain-hardening and multiple-cracking behaviors with tensile strain capability above 3%; and it can keep the crack width below 100 μm even when the tensile strain achieves its maximum value [12]. This material has potential use in complicated environments and structures that are subjected to repeated or fatigue loads, such as airport runway, highway pavements, bridge decks and offshore platform, due to its high ductility [12,14–16] and durability [17–20]. To apply ultra-high toughness cementitious composites in practice, the investigation of fatigue behavior of this material is needed. Several studies have been carried out focusing on fatigue behavior of UHTCC in the past decade. Fatigue failure characteristics and fiber bridging characteristics of UHTCC under flexure were investigated and it was found that UHTCC exhibited significantly higher fatigue life and more ductility than concrete, polymer cement mortar and steel fiber reinforced concrete [21–25]. In addition, flexural fatigue behavior of concrete beam with UHTCC layer [26–28] and the tensile failure property of UHTCC under monotonic and cyclic tensile loads [29,30] has been studied. Based on the fatigue test results in [27], while the use of UHTCC layer can increase the strength of concrete beam, its improvement on fatigue performance is even more effective and concrete beam with UHTCC layer could sustain fatigue loading at a larger deflection without failure. Up to now, the existing study is mainly focused on the behavior of UHTCC under flexural fatigue and cyclic tensile loads, while there is limited study on the compressive fatigue properties of UHTCC. Considering that the fatigue behavior of UHTCC under compression is crucial for its application in certain conditions (e.g. airport runway and road pavements) and fatigue damage of structural components are affected by both the flexural and compressive cyclic loading, the available work is rather limited and a better understanding of the compressive fatigue behavior is required. Thus, in order to investigate the fatigue behavior of UHTCC under compression, a series of monotonic and fatigue tests were performed.
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کلمات کلیدی:
Fiber-reinforced concrete - Wikipedia https://en.wikipedia.org/wiki/Fiber-reinforced_concrete Fiber-reinforced concrete (FRC) is concrete containing fibrous material which increases its ... If the fiber's modulus of elasticity is higher than the matrix (concrete or mortar binder), they help ... Method for Flexural Toughness and First-Crack Strength of Fiber-Reinforced Concrete (Using ... Cement and Concrete Composites. [PDF]Fibre Reinforced Cementitious Composites - ResearchGate https://www.researchgate.net/file.PostFileLoader.html?id...assetKey... Behaviour of fibre reinforced cementitious materials. 11 ... Reinforcing mechanisms in asbestos–cement composites 355. 9.5 .... HPFRCC high performance fibre reinforced composite h ... fracture toughness of the fibre–matrix interface. KIc,p. Compressive fatigue damage and failure mechanism of fiber ... iranarze.ir/wp-content/uploads/2016/11/E2929.pdf Oct 7, 2016 - The fiber reinforced cementitious material with high ductility has .... ing fatigue life, deformation pattern and failure mode of fibers on the. Flexural Behavior of High-Volume Steel Fiber Cementitious ... - Hindawi https://www.hindawi.com/journals/je/2016/2857270/ by S Kim - 2016 - Related articles Nov 20, 2016 - High-performance fiber-reinforced cementitious composites ... has been an increased interest in developing materials with high toughness that resist .... Compressive crushing of concrete was the dominant failure mode in all ... [PDF]Self-Healing Capability of Fibre Reinforced Cementitious Composites www.j-act.org/headers/7_217.pdf by D Homma - 2009 - Cited by 110 - Related articles 2007). Ultra ductile fibre reinforced cementitious com- posites (so called strain ... crack was the main mechanism for self-healing of ma- tured concrete .... Table 1 Employed materials in this study. Cement. High-early-strength. Portland cement. [PDF]ACI MATERIALS JOURNAL TECHNICAL PAPER Micromechanics ... citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.11.1405&rep=rep1...pdf by VC Li - 2004 - Cited by 76 - Related articles mechanisms beyond the elastic stage. Composite ... Very high ductility HPFRCC can now be ... material, including fiber-reinforced cementitious composites, is. [PDF]Fiber Reinforced High Performance Concrete Material - Deep Blue deepblue.lib.umich.edu/bitstream/handle/2027.42/84775/li_hpc_HK2000.pdf?...1 High performance fiber reinforced cementitious materials. (HPFRC) can ... The high performance of ECC is due to its ultra-ductility. The material ..... desired stabilization method for cementitious suspensions (Uchigawa et a1, 1997). Figure 5 (c) ... on high performance fiber reinforced cementitious ... - Deep Blue https://deepblue.lib.umich.edu/bitstream/handle/2027.42/.../Li-JCI2003Hpfrcc.pdf?... by VC Li - 2003 - Cited by 11 - Related articles parameters characterizing the toughness of fiber reinforced cementitious composites. However ... To determine whether a material is an l-[PFRCC possessing high ductility, ..... Mechanisms,” in High Performance Fiber Reinforced Cementitious ... Searches related to mechanism of fiber reinforced cementitious material with high ductility fiber reinforced concrete fiber reinforced concrete pdf types of fiber reinforced concrete fibre reinforced concrete properties fiber reinforced concrete advantages and disadvantages fibre reinforced concrete ppt fibre reinforced concrete mix design advantages of fiber reinforced concrete
