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Showing 1 to 20 of 23 for “"ultimate limit state"”.
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A new ultimate limit state approach to the design of prestressed concrete beams
… design, the designer would need to know the limits of the bending moment redistribution for the beam under consideration. An equation is therefore necessary to assist the designer in this regard. Such an equation should take into account the cross-section shape of the beam and the prestress …
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An investigation into the behaviour of hollow ribbed (waffle) rectangular reinforced concrete slabs at ultimate limit state
The elastic to ultimate load behaviour of reinforced concrete waffle slabs subjected to uniformly distributed load and 4-point loads are reported in this thesis. A total of twenty 1/4- and one 1/2-scale reinforced concrete waffle model slabs, with different area of steel and rib depth to slab …
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Service and Ultimate Limit State Flexural Behavior of One-Way Concrete Slabs Reinforced with Corrosion-Resistant Reinforcing Bars
… influences flexural performance at service and ultimate limit states. Moment-curvature predictions from the computer-based sectional analysis program Response 2000 were consistent with the tested results, demonstrating its viability for use with high strength and non-metallic bar without a …
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Verificação no estadio I e II e na ruptura de seções em concreto protendido
… for analysis of the working stresses, the ultimate limit state and the ultimate fadigue state of a post-tensioned concrete section subjected to a bending moment and normal force. The program allows the analysis of sections for any age of the structure, as well as for applications of the …
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LIGHTWEIGHT AND ADVANCE PRECAST CONCRETE SYSTEM FOR MODULAR BUILDING CONSTRUCTION
… and global aspect ratios, the long-term service limit state (long-term SLS), seismic action performance, ultimate limit state (ULS), and staged construction are compared to suggest the compatibility of the proposed module with the Healthcare and Institutional Buildings. The seismic analysis …
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Model-based design of a ultra high performance concrete prototype highway bridge girder
… The designs were assessed against service and ultimate limit state crack-opening criterions. A 2-D model was first analyzed to determine global flexural behavior of the beams, followed by a 3-D model to examine localized strain effects. The results of this work showed that a girder, with a …
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Flexural Behaviour of Concrete Beams with High Strength Reinforcement
… A23.3:19 “Design of Concrete Structures” limits the maximum yield strength for design to 500 MPa. This thesis investigates the flexural behavior of concrete beams reinforced with HSR to assess whether current code provisions are appropriate. Curvature ductility ratios are calculated for …
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Determinação da fluência do concreto e do coeficiente de Poisson diferido em um estado de tensões de compressão bi-axial
… stress. The safety check in the serviceability limit state and in the ultimate limit state of the test slab under systems of self-equilibrated forces are presented in parallel in this work. The set of employed instruments consisted of 31 Carlson electric strain gauges and 12 supports for …
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Load and resistance factor design of shallow foundations for bridges
… Uncertainties in design parameters for ultimate and serviceability limit states are evaluated. A random field model is employed to investigate the combined inherent spatial variability and systematic error for serviceability limit state. Advanced first order second moment method is then …
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Design of wind turbines with Ultra-High Performance Concrete
… programs in order to satisfy both the Service Limit State (SLS) and the Ultimate Limit State (ULS). The best design is obtained for a SLS criteria deflection of L/800. The cost of material is reduced by a factor between 2 and 3 in comparison with traditional steel. All of this confirms that …
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Resistance Factor for Cold-Formed Steel Compression Members
… the resistance factor per cross-section type, ultimate limit state, and considering partially and fully effective columns. The observed trends support a higher resistance factor for columns buckling in a distortional buckling limit state and an expansion of the current DSM prequalified limits. …
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Sand Deformation Mechanisms and Earth Pressures Mobilised with Retaining Wall Movements
… design of retaining walls is typically based on ultimate limit state calculations with arbitrary factors of safety, while the assessment of wall deformations is based on serviceability limit state calculations. Such an inconsistency has caused much uncertainty and hence inevitably excessive …
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Semi-rigid joints for moment-resisting steel framed seismic-resisting systems
… and detailed to withstand the design level ultimate limit state (500 year return period) earthquake with minimum damage. To meet economic criteria, the joints and systems were also required to be cost-effective to design, fabricate and construct when compared with conventional MRSFS. Four …
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Experimental and analytical study of the shear transfer in composite shallow cellular floor beams
… is subject to a complex three-dimensional stress state, and it is difficult to analyse it using the mathematical model rather than empirical formula. Finite Element Analysis of the concrete-infill-only shear connection was performed with a parametric study to further verify the design method that …
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Sustainable 3D Concrete Printing for Eco-conscious Construction: Recycled Aggregates and Low-carbon Binders
… wind pressures exceeding four times the ultimate limit state design load. By reducing cement content in printable concrete mixtures, reintegrating CDW as recycled aggregate, and employing structurally efficient geometries, 3DCP can evolve into a viable low-carbon construction method.
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Retrofitting of Mechanically Degraded Concrete Structures Using Fibre Reinforced Polymer Composites
… sheets. The failure modes of these beams, at ultimate limit state, were examined and the influencing factors were identified. A premature and extremely brittle collapse mechanism was found to be the predominant type of failure for beams strengthened with a large area of FRP composites. A …
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Performance Evaluation of RC Flexural Elements Strengthened by Advanced Composites
… together with salient strength factors at ultimate limit state and (d) to carry out analytical modelling using a commercial FE package. <br/><br/>The experimental investigation comprised of testing 55 simply supported RC beams of either 1.5m or 2.6m length. In addition to the parametric …
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Thermally-induced ratcheting behaviour of laterally-loaded reinforced concrete energy piles in sand
… and a sublayer approach. It found that the limiting lateral soil pressure distributions exhibited a peak above the plastic hinge with the strain-softening model for both the dry and saturated tests. Comparisons of measured and predicted results demonstrated that for the laterally-loaded pile …
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A Regional Study on Champlain Sea Clay: Empirical Prediction of Consolidation Parameters and Statistical Characterization of Undrained Shear Strength Based on Historical Geotechnical Data
… often exceeding acceptable serviceability limits. CSCs are also sensitive in nature due to high-water content, low coefficient of permeability and pore-water salinity and typically exhibit strain-softening behavior. In many scenarios, significant post-peak shear strength loss can trigger …
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Strength and Ductility of Concrete Cylinders Confined with Fiber Metal Laminate Composites
… mitigated by design codes through strict strain limits. Because FRP is designed for very low strain levels to prevent brittle rupture and unpredictable debonding, buildings and bridges are strengthened in such a way that restricts their energy dissipation capacity at the ultimate limit state. …
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