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Showing 1 to 20 of 191 for “"concrete beams"”.
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Shear Behavior of Reinforced Concrete Beams and Prestressed Concrete Beams
… the last decades, developments in high-strength concrete materials are rapid, but codes of practice still limits the concrete compressive strength in design of concrete structures due to a lack of experimental research data. As an effort to overcome the limitation to the use of high strength …
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Fatigue of Concrete Beams and Slabs
… to all specimens tested, indicated cracking in concrete occurred in a narrow band. Regions of high plastic strain were found in the plane of cracking, while adjacent areas experienced decreases in strain levels with cracking. Strain gages indicated cracking in concrete slabs initiated on the …
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Fatigue Resistance of Prestressed Concrete Beams
Made available in DSpace on 2014-12-13T19:31:47Z (GMT). No. of bitstreams: 1 7913440.pdf: 5005051 bytes, checksum: c139856fd175e8209a3abe2501fdef60 (MD5) Previous issue date: 1978
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Residual strength of corroded reinforced concrete beams.
… is focused on the corrosion of reinforcement in concrete members. However, none addresses the problems associated with the residual strength of reinforced concrete beams exhibiting both main and shear reinforcement corrosion simultaneously. The aim of this research, therefore, was to determine …
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Optimum shear strengthening of reinforced concrete beams
… be used to strengthen shear deficient reinforced concrete (RC) structures. The strengthening system is associated with a number of parameters including the number of straps, strap locations, strap stiffness, and strap prestress. The initial goal of this research was to identify the optimum values …
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Optimal design of fabric formed concrete beams
… the optimization of the design of fabric formed concrete beams. The thesis proposes two methods: an analytical optimization method and a feasible region method. The optimum design of fabric formed reinforced concrete beams is discussed first and a sample output of the optimum design based on …
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Creep to rupture behavior of concrete beams.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1969. M.S.
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Design of prestressed, fabric-formed concrete beams
… forms and prestressing are both technologies for concrete structures that allow for less material to do more work. This thesis seeks to assess the feasibility and performance of fabric formed, prestressed beams with a keyhole cross-section, while varying parameters such as concrete strength, …
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Reliability of reinforced concrete beams in torsion
… 318-83 design criteria for torsional reinforced concrete members is evaluated. Advanced first-order, second-moment reliability analysis is used to compute the reliability index. Reinforced concrete beams, subjected to both equilibrium and compatibility torsion, are analyzed. The uncertainties …
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Lifting Analysis of Precast Prestressed Concrete Beams
… are performed to investigate the behavior of concrete beams during lifting and to validate the proposed method. Additionally, a statistical characterization of beam imperfections is presented, based on recently conducted field measurements of beam lateral sweep and eccentricity of lift …
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Capacity of concrete beams prestressed with BFRP tendons
Steinsteypt mannvirki eru yfirleitt járnbent vegna lágs togstyrks steypunnar. Járnbending hentar að mörgu leyti vel en hefur þann ókost að tærast sé hún ekki varin. Þetta á einkum við þar sem raki, selta eða önnur efnaáraun er mikil. Við slíkar aðstæður geta önnur efni verið heppilegri sem bending …
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Strength of Prestressed Concrete Beams With Web Reinforcement
Made available in DSpace on 2014-12-05T17:36:58Z (GMT). No. of bitstreams: 1 5805430.pdf: 5879102 bytes, checksum: 936e51367f6ee17564746a2b1ed88e99 (MD5) Previous issue date: 1958
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Fatigue Behaviour of CFRP Strengthened Reinforced Concrete Beams
The performance of reinforced concrete (RC) structures, such as bridges in the heavy haul industry, may be severely impacted by fatigue when subjected to repeated cyclic loading. Fatigue not only reduces load carrying capacity and serviceability limit states (SLS), but it can cause structural …
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Flexural Behaviour of Concrete Beams with High Strength Reinforcement
Using High Strength Reinforcement (HSR) in concrete construction allows steel volumes to be reduced, and economies to be realized. CSA Standard A23.3:19 “Design of Concrete Structures” limits the maximum yield strength for design to 500 MPa. This thesis investigates the flexural behavior of …
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Deformation of partially prestressed concrete beams under service loads.
… tests were carried out on partially prestressed concrete beams in which 50 percent of the service load was sustained for a period of up to 46 days during which time the load was increased to the full service load up to seven times in intermittent short-term cycles. One cycle of short-term loading …
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STRUCTURAL RETROFITTING OF CONCRETE BEAMS USING FRP - Debonding Issues
… was developed for simulating the behaviour of beams retrofitted with fibre reinforced polymer (FRP). The ABAQUS program was used for this purpose. Concrete was modelled using a plastic damage model. Steel bars were modelled as an elastic perfectly plastic material, with perfect bond between …
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