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Showing 1 to 20 of 38 for “"Splices"”.
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Non-Contact Lap Splices in Dissimilar Concretes
Non-contact lap splices placed within a single concrete placement are often used and have been studied in previous research projects. However, non-contact lap splices used with each bar in a different concrete placement such that there is a cold joint between the bars, have not been investigated. …
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Seismic behavior of bridge pier column lap splices
Inadequate flexural strength and ductility, or shear strength, of concrete bridge columns have resulted in collapse or severe damage of a number of California bridges in recent moderate earth-quakes. In general, these bridges were designed prior to the new seismic design methods which were …
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Confinement Limits For Tensile Lap Splices Under Static Loading
ABSTRACT In tension lap splices, the benefit provided to the lap by stirrups placed to intercept cracking due to bond splitting action is recognized by the American Concrete Institute (ACI 318-89) and the design recommendations of the ACI Committee 408, on which the American code provisions are …
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A method of fabricating coated splices for oilfield applications
… After equipment and a process are designed, splices are produced and testing proceeds. Then an overall assessment of the method is made: connecting the wires in manufacturing should be done by ultrasonic welding and coating the wires using injection molding is a viable option. Further testing …
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Hooked Bar Anchorages and their Use in Noncontact Lap Splices
Lap splices are used in reinforced concrete structures to transfer tension forces across discontinuous reinforcing bars to allow for continuity of load path in structural elements. Lap splices of straight reinforcing bars present a number of disadvantages when used in connections of large precast …
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Effectiveness of Alternative Reinforcing Strategies for Non-Contact Hooked Bar Lap Splices
… and develop design guidance for hooked bar lap splices. This project did not investigate three parameters: the number of lap splices, the placement of transverse reinforcement, and the addition of steel fibers in the closure joint. For this thesis, 15 beam-splice specimens were tested in 4 …
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Non-Contact Lap Splices in Geometrically Dissimilar Bridge Column to Drilled Shaft Connections
Contact lap splices are widely used for the construction of reinforced concrete structures. But, it is often required to provide a reinforcing steel splicing arrangement with non-contact lap splices due to the limitation of internal space or geometric irregularity for the connection of non-circular …
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A Design Approach for Seismic Retrofit of Circular Bridge Columns With Lap Splices
A careful examination of the cross section of the only column that was pulled to failure during the field tests carried out in this study suggested that the cracking pattern in the section was different from that assumed failure mechanism in the design method that was used. That was presumed to be …
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Repair of Impact-Damaged Prestressed Bridge Girders Using Strand Splices and Fiber-Reinforced Polymer
This study is part of a VDOT sponsored project focusing on repair techniques for impact damaged prestressed bridge girders. The investigation included evaluation of the repair installation and flexural strength of four AASHTO Type III girders that were intentionally damaged and repaired. In …
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Repair of Impact-Damaged Prestressed Bridge Girders Using Strand Splices and Fabric Reinforced Cementitious Matrix
… prestressed concrete bridge girders with strand splices and fabric-reinforced cementitious matrix systems, specifically for repair of structural damage to the underside of an overpass bridge girder due to an overheight vehicle collision. Collision damage to bridges can range from minor to …
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Retrofit of deficient lap splice with post-installed anchors
… efficient retrofit solutions, with deficient lap splices being one of many research areas. A possible method to increase the capacity of deficient lap splices is to use post-installed undercut anchors. These anchors function as active confinement in the splice region, potentially allowing members …
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Effect of Beam Splicing on Seismic Response of Buckling-Restrained Braced Frames
… columns. A different connection detail with beam-splices outside the gusset has been shown to increase connection rotation capacity when compared to typical connections, in a few component tests. This study expands upon the performed component tests, by analyzing the beam splice connection at the …
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The influence of semi-rigid connections on the non-linear behaviour of pallet rack and scaffold structures
… In addition, they show the influence of splices and member and out-of-plumb imperfections on the scaffold behaviour. The papers on pallet rack structures provide information on the influence of semi-rigid connections in pallet rack performance. The paper describing the numerical modelling …
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High resolution optical time domain reflectometry and its applications
… segmentation via partially reflective optical splices for local strain measurements is discussed both from a theoretical and practical standpoint. Experimental results demonstrating the feasibility of such local strain measurements are also given. Another part of this investigation considers …
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Experimental Evaluation of Composite Action of Steel Box Truss Towers in Flexure
… a reduced stiffness. The configuration with splices at quarter points exhibited a higher degree of composite action than the configuration with splices at mid span. In addition, the configuration with splices at quarter points performed similar to the control specimen throughout the entire …
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Tapered Splice for Efficient Power Coupling to Small-Core Nonlinear Fibers
… of power flow is also provided. Tapered splices were fabricated using two different experimental setups. The experimental setup to verify our theoretical results is shown. The tapering process is thoroughly discussed. The spectrum of a tunable laser passing through a splice shows how …
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Analytical Modeling of the Repair Impact-Damaged Prestressed Concrete Bridge Girders
… damaged prestressed bridge girders: strand splices, fiber reinforced polymer (FRP) overlays, and fabric reinforced cementitious matrix (FRCM) overlays. The flexural strength of four AASHTO Type III girders, three of which were intentionally damaged and repaired, was evaluated. Six …
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Temperature corrected strain measurements using optical time domain reflectometry
… and a method for manufacturing small air gap splices for use in measuring strain at several places along an optical fiber are presented.
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Influence of the Gravity System on the Seismic Performance of Special Steel Moment Frames
… beam to column connections, and the location of splices in the gravity columns. Moreover, this research investigates the potential for the development of inelastic deformations in the gravity columns, and the effect of such deformations on structural response. The results show that gravity …
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On the use of locality aware distributed hash tables for homology searches over voluminous biological sequence data
… sequence segments with high similarity and splices them together to form an alignment. This paper includes an empirical evaluation of the performance, sensitivity, and scalability of the proposed system over the NCBI's non-redundant protein dataset. In these benchmarks, Mendel demonstrates …
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