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Rafid Saeed Atea - One of the best experts on this subject based on the ideXlab platform.
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Investigation of Torsional behavior and capacity of reactive powder concrete (RPC) of hollow T-beam
Elsevier, 2019Co-Authors: Hussein Ashour Al M Khuzaie, Rafid Saeed AteaAbstract:A hollow reinforced concrete T-beams were investigated under the effect of Pure tension experimentally, which are made of reactive powder concrete (RPC). This concrete was produced with adding steel fiber and silica fume in different dosages. The present work aims at studying the effect of the steel fiber volumetric ratio (Vf) and silica fume content (Sf) on the behavior of hollow T-beam under Pure Torsion and so, on its Torsional capacity. For this purpose T-beams were simply supported with 1400 mm length, 100 mm web width, flange width 220 mm and 160 mm height were tested. It was found that the addition of 2% steel fibers to concrete mix increased the cracking and ultimate torque of the RPC hollow T-beam. An increase of 184% in cracking torque and 66% in ultimate torque for hollow section was achieved while the other properties kept constant. Keywords: Ultra high-performance concrete, Reactive powder concrete, Steel fiber, Silica fume, Hollow T-bea
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investigation of Torsional behavior and capacity of reactive powder concrete rpc of hollow t beam
Journal of materials research and technology, 2018Co-Authors: Hussein Ashour Al M Khuzaie, Rafid Saeed AteaAbstract:Abstract A hollow reinforced concrete T-beams were investigated under the effect of Pure tension experimentally, which are made of reactive powder concrete (RPC). This concrete was produced with adding steel fiber and silica fume in different dosages. The present work aims at studying the effect of the steel fiber volumetric ratio ( V f ) and silica fume content ( S f ) on the behavior of hollow T-beam under Pure Torsion and so, on its Torsional capacity. For this purpose T-beams were simply supported with 1400 mm length, 100 mm web width, flange width 220 mm and 160 mm height were tested. It was found that the addition of 2% steel fibers to concrete mix increased the cracking and ultimate torque of the RPC hollow T-beam. An increase of 184% in cracking torque and 66% in ultimate torque for hollow section was achieved while the other properties kept constant.
Ceresa Paola - One of the best experts on this subject based on the ideXlab platform.
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EXPERIMENTAL STUDY ON STEEL FIBER REINFORCED CONCRETE BEAMS IN Pure Torsion
fib Proceedings, 2019Co-Authors: Facconi Luca, Minelli Fausto, Plizzari Giovanni, Ceresa PaolaAbstract:This paper concerns an experimental study on Steel Fiber Reinforced Concrete (SFRC) beams tested under Pure Torsion. The beams are reinforced with longitudinal rebars without any transverse reinforcement that was substituted by high strength steel fibers. Experimental results show that SFRC allows a stable Torsional behavior after cracking, in terms of enhanced crack control, increased cracked stiffness and Torsional resistance. In order to predict the response of SFRC beams, an analytical model reported in the literature has been used and adapted to the fib Model Code 2010 provisions. The results of the model prediction are compared against the experimental results and critically discussed
Yuhang Wang - One of the best experts on this subject based on the ideXlab platform.
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seismic behaviour of concrete filled steel tubular columns with internal h section steel under Pure Torsion and compression Torsion loads
Engineering Structures, 2020Co-Authors: Zhengbo Pi, Meni Su, Yuanyuan Peng, Yuhang WangAbstract:Abstract Concrete-filled steel tube (CFST) columns have been widely used in the construction industry because of their excellent compression capacity and Torsion resistance. Regarding traditional CFST columns, the H-CFST column with an additional H-section steel member embedded in the core concrete provides improved fire and compression resistance. In this study, the seismic performance of nine H-CFST columns under cyclic Torsional and compression–cyclic Torsional loads was experimentally analysed. In the experiments, the failure mode, torque versus Torsional angle hysteresis, torque versus Torsional angle skeleton, Torsional stiffness degradation, and energy dissipation capacity were determined. The hysteretic curves of the H-CFST columns under Torsion were relatively plump in shape and exhibited no ‘pinching’ phenomenon, and the Torsional stiffness of the H-CFST columns under unloading and reverse loading was approximately equal to the initial Torsional stiffness. In addition, the applied compression had remarkable effects on the Torsional capacity, Torsional ductility, Torsional stiffness, and hysteretic loop energy dissipation of the H-CFST columns. The shear capacities of the steel and concrete under normal stress or combined normal and shear stress were determined based on the latest theories and test results. Moreover, design method for the determination of the Torsional capacity of H-CFST columns under compressive Torsion is proposed based on the test results, and the theoretical contribution ratio of the H-section steel, steel tube, and concrete in the H-CFST columns to the Torsional capacity was determined.
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combined compression bending Torsion behaviour of cfst columns confined by cfrp for marine structures
Composite Structures, 2020Co-Authors: Yuhang Wang, Yuyan Wang, Chao Hou, Xuhong Zhou, Ran Deng, Yongsen Lan, Wei Luo, Weibo KongAbstract:Abstract An innovative composite structural member formed by concrete filled steel tube (CFST) circumferentially confined by carbon fiber-reinforced plastics (CFRP), i.e., referred to as CFRP-CFST, has great potential to be used in marine environment due to its excellent structural performance and corrosion resistance. This paper aims to investigate the behaviour of CFRP-CFST subjected to combined compression-bending-Torsion load. Quasi-static tests are conducted on 5 CFRP-CFST members and 3 reference bare CFSTs. The test parameters include the loading scenario (Pure Torsion, bending-Torsion, and compression-bending-Torsion), the axial load ratio and the layers of CFRP wrapping. Experimental results show that the CFRP-CFST members exhibit good energy dissipation capacity under Pure Torsion and compression-bending-Torsion loads, while the applied axial force benefits the bearing capacity and the stiffness. However, ‘pinch’ effect is observed in the load-deformation hysteretic curves of CFRP-CFST under bending-Torsion load. It indicates that the confinement provided by CFRP can significantly improve the column bearing capacity and ductility under Torsion. When subjected to combined compression-bending-Torsion, the CFRP wrapping can effectively improve the column ductility. The energy dissipation capacity increases with multiple CFRP layers. Eventually, the structural mechanism at the ultimate limit state is analyzed, with the calculation methods for the bearing capacities evaluated.
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seismic behavior of steel tube confined rc columns under compression bending Torsion combined load
Journal of Constructional Steel Research, 2018Co-Authors: Yuhang Wang, Wei Wang, Ju ChenAbstract:Abstract In order to study the mechanical behavior of steel tube confined reinforced concrete (STRC) columns under combined compression-bending-Torsion, an experimental investigation was conducted. The load–deformation hysteretic curves and the strain distribution law of steel tubes under Pure Torsion, bending-Torsion and compression-bending-Torsion loads were obtained. Results show that a ‘pinch’ effect appeared in the load–deformation hysteretic curves of STRC under Pure Torsion and bending-Torsion loads, however, this was not noticeable for specimens under compression-bending-Torsion load. When the axial compression ratio was relatively small, STRC columns under compression-bending-Torsion load showed higher bending capacity and Torsion capacity than that under bending-Torsion load, as well as good energy dissipation capacity. Furthermore, the strain of the steel tube increased linearly with the load, and the corresponding stress was always below the yield strength. Based on the test results, the enhancement of the bending and Torsion capacities of reinforced concrete columns caused by steel tubes, and the reduction of the bending capacity of STRC columns caused by torque were analyzed.
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experimental study on seismic behavior of concrete filled steel tube columns under Pure Torsion and compression Torsion cyclic load
Journal of Constructional Steel Research, 2012Co-Authors: Jianguo Nie, Yuhang Wang, Jiansheng FanAbstract:Abstract Based on the quasi-static test on eight CFST columns subjected to Pure Torsion and compression–Torsion cyclic load, the Torsion behavior of CFST columns with various section types, steel ratios and axial load levels was studied. The test results showed that the hysteretic curves of CFST columns under Pure Torsion and low compression–Torsion cyclic load are very plump, which indicate that CFST columns have good seismic capacity. The unloading stiffness of CFST columns was equal to the initial elastic stiffness. The Torsion capacity of CFST columns could be improved by the low compressive load, and the ductility was also good. But the Torsion capacity of CFST columns would be reduced by the high compressive load. When CFST columns subjected to Pure Torsion, spiral diagonal compressive struts will be created in the in-filled concrete, and the axial components of the diagonal compressive force of the in-filled concrete was equal to the axial tensile force of the steel tube in order to satisfy the axial load equilibrium condition on the section, so the axial strain will be produced in the steel tube. The shear strain has good linear relationship with the rotation angle of the section when CFST columns subjected to Pure Torsion and compression–Torsion combined action. Based on the test results and literatures available, the Torsion mechanism of CFST columns was preliminarily analyzed.
Hussein Ashour Al M Khuzaie - One of the best experts on this subject based on the ideXlab platform.
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Investigation of Torsional behavior and capacity of reactive powder concrete (RPC) of hollow T-beam
Elsevier, 2019Co-Authors: Hussein Ashour Al M Khuzaie, Rafid Saeed AteaAbstract:A hollow reinforced concrete T-beams were investigated under the effect of Pure tension experimentally, which are made of reactive powder concrete (RPC). This concrete was produced with adding steel fiber and silica fume in different dosages. The present work aims at studying the effect of the steel fiber volumetric ratio (Vf) and silica fume content (Sf) on the behavior of hollow T-beam under Pure Torsion and so, on its Torsional capacity. For this purpose T-beams were simply supported with 1400 mm length, 100 mm web width, flange width 220 mm and 160 mm height were tested. It was found that the addition of 2% steel fibers to concrete mix increased the cracking and ultimate torque of the RPC hollow T-beam. An increase of 184% in cracking torque and 66% in ultimate torque for hollow section was achieved while the other properties kept constant. Keywords: Ultra high-performance concrete, Reactive powder concrete, Steel fiber, Silica fume, Hollow T-bea
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investigation of Torsional behavior and capacity of reactive powder concrete rpc of hollow t beam
Journal of materials research and technology, 2018Co-Authors: Hussein Ashour Al M Khuzaie, Rafid Saeed AteaAbstract:Abstract A hollow reinforced concrete T-beams were investigated under the effect of Pure tension experimentally, which are made of reactive powder concrete (RPC). This concrete was produced with adding steel fiber and silica fume in different dosages. The present work aims at studying the effect of the steel fiber volumetric ratio ( V f ) and silica fume content ( S f ) on the behavior of hollow T-beam under Pure Torsion and so, on its Torsional capacity. For this purpose T-beams were simply supported with 1400 mm length, 100 mm web width, flange width 220 mm and 160 mm height were tested. It was found that the addition of 2% steel fibers to concrete mix increased the cracking and ultimate torque of the RPC hollow T-beam. An increase of 184% in cracking torque and 66% in ultimate torque for hollow section was achieved while the other properties kept constant.
Enrique Hernandezmontes - One of the best experts on this subject based on the ideXlab platform.
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approximate expression of the prandtl membrane analogy in linear elastic Pure Torsion of open thin walled cross sections and regular polygons
International Journal of Solids and Structures, 2021Co-Authors: Luisa Maria Gilmartin, Antonio Palomares, Enrique HernandezmontesAbstract:Abstract This paper presents a new general methodology to obtain an approximate analytical expression of the Saint-Venant's Torsion. The shear stress in each of the principal Cartesian directions is obtained by the derivation of the stress function, whose analytical expression is obtained from the Prandtl analogy. The proposed methodology uses two variables quadratic piecewise functions to define the Prandtl membrane. This document shows that the approximate procedure is especially suitable for steel shapes, giving values very close to those obtained with more precise methods. The main advantage of the presented methodology is its simplicity, which makes it useful for both pedagogic and practical applications. Several examples are developed.
