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Showing 1 to 20 of 33 for “"Bond Behavior"”.
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Bond Behavior of High Performance Reinforcing Bars for Concrete Structures
Bond between the concrete and the reinforcing steel is a major factor affecting the performance of reinforced concrete structures. Advances in material science led to the production of High Performance Steel that has enhanced corrosion resistance and higher strength compared to conventional Grade …
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Bond Behavior of Fiber Reinforced Polymer Bars Under Hinged Beam Conditions
The research provided in this report examines the behavior of fiber reinforced polymer (FRP) reinforcing bars, embedded in normal weight concrete (NWC) hinged beam-end specimens, tested in accordance with two laboratory conditions. Reinforcing bars of different diameter, material configuration, and …
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BOND BEHAVIOR BETWEEN STEEL AND HIGH MODULUS CFRP PLATES AT MODERATLEY ELEVATED TEMPERATURES
… elevated temperatures, up to 50oC, on the bond behavior of steel beams strengthened with externally bonded carbon fiber reinforced polymer (CFRP) plates. In the first phase of the research, five steel-CFRP bonded double-lap shear coupons were tested at different temperatures to characterize …
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Zum Verbundverhalten von Spannstahl mit sofortigem Verbund unter Betriebsbeanspruchung
… on the influence on the concrete and steel behavior are known, only very little research on the influence on the interaction especially the bond of prestressing strands was done yet. In the first part of this work the bond behavior of prestressing strands in the anchorage zone is described. …
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Characterization of polyethylene terephthalate, cellulose acetate and their blends
… interactions play pertinent roles in adhesive bond performance and polymer-polymer miscibility. In this study, the correlation between the surface characteristics of two polymers and their adhesive bond behavior as well as the compatibility of their blend systems are investigated through both …
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Bond Characteristics of Micro-Composite Multi-Structural Formable Steel Used in Reinforced Concrete Structures
The bond performance of a unique type of reinforcing steel rebars, claimed to have high corrosion resistance as well as high tensile strength, with concrete was studied. The objective was to investigate the bond behavior of straight rebars made out of this steel, named MMFX, embedded in concrete …
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Transfer and Development Lengths of Steel Strands in Full-Scale Prestressed Self-Consolidating Concrete Bridge Girders
… projects, though concern about early-age bond behavior has limited the material’s application in prestressed members. A keen understanding of SCC’s bond strength, including its impact on transfer and development lengths in prestressed members, is essential to safely implement SCC in …
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Zum Verbund- und Querkrafttragverhalten von Spannbetonträgern aus ultra-hochfestem Beton
… of the German Research Foundation (DFG), the bond behavior of strands in ultra-high performance concrete (UHPC) as well as the shear bearing behavior of pretensioned girders were investigated at the Institute of Structural Concrete at the RWTH Aachen University. This thesis deals with both of …
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Time-dependent response of flat plate structures under high sustained load
… In order to isolate and study aged concrete behavior under high sustained load, ASTM C512 (2010) compressive tests on plain concrete cylinders were conducted under sustained load levels ranging from 68 percent to 76 percent of the compressive strength of concrete. Concrete subjected to a …
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Rigidity and Fluidity in Living and Nonliving Matter
… of the two beads describe the catch/slip bond behavior of the integrins in focal adhesions. Net motion arises from an interplay between active contractility (and passive extendability) of the stress fibers and an asymmetry between the front and back of the cell due to catch bond behavior …
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Strengthening of Steel Structures with High Modulus Carbon Fiber Reinforced Polymers (CRRP) Materials: Bond and Development Length Study
… of carbon fiber sheets and the adhesives for bonding of pre-cured laminate strips. The bond behavior of FRP materials to steel structures is quite different from that of concrete structures. Preliminary test results showed the occurrence of very high bond stresses for most strengthening …
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Predictive Modelling of CFRP-Steel Double Strap Joints
… hand, failure is more likely to happen at the bond interface due to the high strength characteristics of steel and CFRP. Thus, studying the bond behavior and failure mechanism of CFRP strengthened steel structures as well as the variables that are crucial to the bond quality. Prior to …
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Mechanisms and mechanics of non-structural adhesion
… into the mechanisms of adhesion and debonding energy associated with the cling between polymeric films and various substrates is presented first. The thermodynamic work of adhesion, electrostatic attraction, and substrate roughness apparently play significant roles in the cling of a …
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Theoretical and computational modeling of peptide-lipid bilayer interaction studied by dynamic force spectroscopy
… method also predicts that k(F) exhibits catch-bond behavior (when, counter intuitively, the detachment rate decreases with increasing force). (2) The proposed multiple detachment pathways method is tested and validated for a particular peptide (SecA2-11) interacting with both zwitterionic POPC …
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Reliability Analysis of Carbon Fiber Reinforced Polymer (CFRP) Strengthened Steel Beams
… dissertation was conducted to investigate the behavior of bonded joints between steel and carbon fiber reinforced polymers (CFRP) with an emphasis on understanding the role of the adhesive mechanical properties and the surface preparation techniques used to produce the joints. Reliability …
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Effects of aging on bond between FRP and concrete
… material of choice.;This research deals with the bond behavior of FRP composite wraps adhered/bonded to concrete surface. Focus of the study is on the bond degradation when the hybrid structure is exposed to different adverse environmental conditions including sustained stress. The study involves …
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An integrated VE damping and FRP strengthening system for performance-based seismic retrofit of RC columns
… were characterized under various conditions, the bond behavior between VE layers and FRP sheets as well as the anchorage behavior between FRP sheets and concrete were investigated, and shake table tests were conducted to validate the effectiveness of the proposed system. Test results show that VE …
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Development of a model to explain the effect of variable membrane compliance on single molecule adhesive bond force
The intermolecular bond force existing between adhesive membrane receptors and extracellular matrix (ECM) molecules is believed to regulate key cell functions, such as growth, apoptosis, motility, and mechanotransduction. From a clinical perspective, understanding the mechanics of cell-matrix bonds …
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Glass Fiber Reinforced Polymer Bars as the Top Mat Reinforcement for Bridge Decks
… was to experimentally investigate material and bond properties of three different types of fiber reinforced polymer (FRP) bars, and determine their effect on the design of a bridge deck using FRP bars as the top mat of reinforcement. The properties evaluated include the tensile strength, modulus …
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Durability behavior of fiber reinforced polymer and steel reinforced polymer for infrastructure applications
… necessary to study the long-term properties and behaviors of concrete members reinforced with composite materials.</p><p>This study includes three topics: 1. Long-term durability of concrete panels reinforced with steel and glass reinforced polymer (GFRP). The main objective of this study is to …
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