Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"neutral axis"”.
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Time-dependent analysis of cable-stayed bridges
… time causing a change in the position of the neutral axis. In different parts of a concrete bridge creep and shrinkage develop at different rates which depend upon various environmental factors and the intrinsic properties of the concrete. In bridges with a variable depth to the soffit, the …
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Finite Element Analysis of Single Plate Shear Connections
… position of a connection with respect to a beam neutral axis. In addition, double-column bolt connections were studied. The results show that bolt shear rupture strength of a connection is not a function of the a-distance. Plate materials and thicknesses that do not satisfy ductility criteria …
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Low velocity impact response of rc beam with artificial polyethylene aggregate as concrete block infill
… (APEA and MAPEA). The concrete near the neutral axis acts as a stress transfer medium between the compression and tension zones. Partial replacement of the concrete near the neutral axis could create a reduction in weight and savings in the use of materials. In this experimental work, …
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Multilayered Structures under large Bending: Finite Solution and Bifurcation Analysis
… states such as the existence of more than one neutral axis for certain geometries. The bending solution is employed to investigate possible in-plane and out-of-plane incremental bifurcations. The analysis reveals that a multilayered structure can behave in a completely different way from the …
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Advances in elliptical-core two-mode optical fiber sensors
… to the distance of the sensor from the neutral axis.
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Behaviour of long span composite beams with precast hollow-core slabs
… of composite beams with the position of the neutral axis in the concrete and also establish the effective width. By varying the beam size, span of beam, shear connection and slab depth in five full-scale experiments, the behaviour of the composite beam will be established.
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Fatigue Behaviour of CFRP Strengthened Reinforced Concrete Beams
… deflection, composite material strains and neutral axis shift. Information on these parameters were collected using strain gauges, linear variable differential transducers (LVDT), DEMEC strain targets and digital image correlation (DIC). Ultimate failure loads under monotonic loading showed …
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Implementing a Long-Term Bridge Monitoring Strategy for a Composite Steel Girder Bridge
… frequency, peak strain, strain distribution, and neutral axis location, will be presented and the changes in these damage measures for five different damage scenarios will be examined to identify the specific damage measures best suited to identify each particular type of damage.</p> <p>In order …
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Design, fabrication and characterisation of free-standing thick-film piezoelectric cantilevers for energy harvesting
… the distance of the piezoelectric layer from the neutral axis of the structure. This research also discusses the possibility of using an array of free-standing cantilevers in harvesting vibration energy in a broader bandwidth from an unpredictable ambient environment.<br/>
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Experiments on a Hybrid Composite Beam for Bridge Applications
… HCB stiffness and strength as it is below the neutral axis. For this composite case the FRP shell and prestressing strands resist about 85% of the applied load while the bridge deck carries the remaining 15% to the end diaphragms and bearings.
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Development of a Field Monitoring System for the Northside Drive Bridge
… measured strain data was used to determine the neutral axis of a girder to determine whether the bridge is composite without the need for bridge plans. A CSIBridge model was developed to compare measured data results and determine the model’s accuracy. The DAQ system is a cost-effective and …
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Fatigue Performance and Shear Demand Distributions of Clustered Shear Connectors in Composite Bridge Girders
… transfer mechanisms as a shift in the steel beam neutral axis toward the concrete slab was observed. </p>
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Lateral and Posterior Dynamic Bending of the Mid-Shaft Femur: Fracture Risk Curves for the Adult Population
… moment of inertia (I), maximum distance to the neutral axis (c), I/c, occupant gender, and occupant mass are shown to be significant predictors of fracture tolerance, while no significant difference is shown for loading direction, bone mineral density, leg aspect and age. Risk functions are …
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A New CFRP-UHPC System for Strengthening Reinforced Concrete T-Beams
… strength of the UHPC overlay will push the neutral axis up and allow the CFRP laminates to be under tension. Four RC beams were cast and tested under four-point bending until failure. The proposed strengthening technique showed an increase in the load capacity while strengthening beam with …
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Experimental investigation of a novel finite element model for Southern pine glulam beams
… were subjected to bending about their major axis, bending about their minor axis, and combined bending and compression. Strains were measured at various locations using clip-on electrical transducers; and, deflections were measured at three locations along the length. Transverse isotropy and …
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Distributed Fibre Optic Sensing to Assess Support Reactions and Behaviour of Composite Steel Bridges
… support reactions. DFOS strain derived neutral axis measurements were used to estimate the level of composite action in the bridge and adjust the flexural stiffness of each beam. Part of a girder in a steel beam with concrete deck bridge in Kingston, Ontario, was instrumented with fibre …
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Strengthening reinforced concrete slabs using a combination of CFRP and UHPC
… implementation of the UHPC overlay will push the neutral axis up to the UHPC overlay, allowing the FRP to act as a tension element at ultimate conditions. Two full scale RC slabs were cast and tested to failure; the first as a control and the second using this new strengthening technique. On the …
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Non-destructive evaluation of solder joint reliability
… critical solder joints located furthest from the neutral axis of the package, typically residing at the package corners. The technique also confirmed that circuit board thickness can affect interconnect reliability, as can floor plan. Improved correlation to the real world environment was achieved …
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Shape distortion and air gap formation during continuous casting.
… pressure. The thermal contraction of the neutral axis "filament" along the whole shell determines the amount of room which is available for the detached corner portion to distort, and thus also the size of the detached lengths of shell. The mechanical equilibrium of the structure is …
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Immediate Deflection Calculations Of Transition And Cracked Prestressed Concrete Sections
… progressively cracks under increasing loads, the neutral axis gets smaller as the cracks propagate towards the compressive face. This reduces the available area in the section to provide stiffness and resist the loads. Without calculating the cracked section properties, the reinforcement ratio is …
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