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Showing 1 to 20 of 24 for “"flexural tests"”.
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Experimental and analytical study of the shear transfer in composite shallow cellular floor beams
… shear connections. In total, 24 push-out tests were performed in two test series to investigate the load-slip behaviour and shear resistance of the shear connections under direct shear force. The failure mechanisms of the two forms of shear connections were extensively studied, which lead …
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Repair of Impact-Damaged Prestressed Bridge Girders Using Strand Splices and Fiber-Reinforced Polymer
… evaluation of the repair installation and flexural strength of four AASHTO Type III girders that were intentionally damaged and repaired. In addition, nonlinear finite element modeling was used to aid in the development of design protocols for each repair method. This report discusses two …
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Development of a Self-Heating Consolidation Procedure for 3D-Printed Continuous Wire Polymer Composite Laminates
… were 91.6% lower compared to unprocessed, while flexural tests found 5% and 12% higher flexural strength and stiffness respectively. Next, the effects of the consolidation procedure were tested on the uniaxial tensile properties of unidirectional and cross-ply 3D-printed CWPC samples, showing …
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Increasing residual structural capacity of cracked concrete railroad crossties with polypropylene fibers
… the concrete has cracked. The center negative flexural cracking is considered as a serious failure mode in concrete railroad crossties, which decreases structural capacity and results in safety issues. It also leads to deterioration of prestressed concrete crossties and shortens the service …
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Standardization of test methods for property evaluation of FRP bars
… (FRP) bars by conducting limited complementary tests to determine/verify their mechanical properties. Both short and long-term tests were conducted as a part of this research. Short-term tests included tension, flexure, shear and bond property evaluations. Long-term tests included evaluation of …
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Mechanical Properties of Random Discontinuous Fiber Composites Manufactured from Wetlay Process
… increment of 0.05 were molded. Both tensile and flexural tests were conducted. The test results showed a common pattern, i.e., the modulus and strength of the composite increased with the fiber volume fraction to a maximum and then started to descend. The test results were analyzed to find out …
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Evaluation of concrete patch repairs
… for removing defective concrete, b) the flexural behaviour of 6 different types of generic repair materials, c) the water permeability of the above 6 types of generic repair materials, and d) the parameters which influence the adhesive strength of patch repairs. In order to evaluate the …
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Service and Ultimate Limit State Flexural Behavior of One-Way Concrete Slabs Reinforced with Corrosion-Resistant Reinforcing Bars
… concrete as compared to traditional black steel. Flexural tests of one-way slabs were conducted to simulate negative transverse flexure over a bridge girder as assumed in the commonly employed strip design method. The bar types studied were Grade 60 (uncoated), epoxy-coated reinforcing (ECR, Grade …
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Transfer and Development Lengths of Steel Strands in Full-Scale Prestressed Self-Consolidating Concrete Bridge Girders
… bridge girders. In the first phase, 56 pullout tests were conducted to compare the performance of seven-wire strands embedded in SCC and conventionally-consolidated concrete blocks. In the second phase, transfer lengths of prestressing strands in two SCC hollow box girders and two SCC I-girders …
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Development and validation of coaxial cable sensors for damage detection of reinforced concrete structures
… and cracking in RC beams. The results from the flexural tests indicated that the sensitivity of the newly designed sensors is 50~100 times higher than that of commercial cables to the longitudinal elongation. The new sensors can be used to successfully detect both the location and width of a …
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Characterization of syntactic foams and their sandwich composites: modeling and experimental approaches
… core sandwich composites for compressive and flexural properties. Flexural tests are carried out in three and four point bending and short beam shear configurations. Syntactic foams are tested in three different specimen sizes and orientations to characterize them as per the recommendations of …
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Structure and properties of carbon fibre reinforced aromatic thermoplastics
… squares ranging from IQ- 25. 4mm square. The flexural, tensile and compressive mechanical properties, fracture and impact toughness, and creep behaviour of these composites were determined, as a function of particle size. Finally, the potential for moulding was assessed. Results from tensile …
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Study of Nozzle Design and Development of Reinforcing Mesh Approach for 3D Construction Printing
… with non-reinforced components via compressive tests and flexural tests to validate the effectiveness and feasibility of the proposed reinforced method. The evaluated nozzle outlet shapes and proposed nozzle design provide a scientific paradigm reference for the selection and development of …
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Characterization of Mechanical Properties of Gamma Irradiated Additively Manufactured Articles for In-Space Manufacturing
… dosage were evaluated by a series of tensile and flexural tests. Findings showed a significant decrease in mechanical performance and noticeable changes in appearance of the parts with accumulated dosage of 1000 kGy and higher. However, for dosages below 10 kGy, samples showed no significant …
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Experimental and Analytical Studies of the Behavior of Cold-Formed Steel Roof Truss Elements
… of a cold-formed steel truss. The results of flexural tests of complex hat shape members are described. In addition, stub column tests of nested C-sections used as web members and full scale cold-formed steel roof truss tests are reported. Numerical analyses using finite strip and finite …
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Seismic precursor identification method integrating acoustic emission physical models and multi-source data
… were conducted, including compression tests on steel fiber-reinforced concrete (SFRC), size effect tests on ultra-high performance concrete (UHPC), flexural tests on UHPC-strengthened beams, field monitoring of cracks in steel-UHPC composite decks, and flexural tests on glass …
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A numerical and experimental investigation of the effects of thermal history on the structure/property relationship of PPS/carbon fiber composites
… the samples were monitored by transverse tensile tests and flexural tests. In all cases, the transverse tensile and flexural moduli increased as the amount of crystallinity in the samples increased. However, samples with greater amounts of crystallinity did not always yield higher transverse …
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Structure, strength and defect characterisation of cement based materials.
… formation leading to permanent deformation in flexural tests), it is very difficult to observe the mechanism in action. The quantitative estimate of the changes occurring in such cement-based systems is challenging due to the anisotropy and complexity of the material. Non-Destructive Testing …
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ASPECTS OF RECYCLING OF CARBON FIBRE REINFORCED POLYETHERETHERKETONE (CF/PEEK)
… model. Mechanical testing such as tensile and flexural tests were conducted. Differential Scanning Calorimetry (DSC) was used to investigate the recycled material's crystallinity and also its transition temperature. Other techniques such as Scanning Electron Microscopy (SEM) and Image Analysis …
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The response of singly curved fibre reinforced sandwich and laminate composite panels subjected to localised blast loads
… 8458-g/m2 respectively. Three point quasi-static flexural tests were conducted on FRP sandwich and laminate specimens where the localised compression failure beneath the central loading bar was evident on both types of structures. The presence of the core reduced the damage observed on the back …
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