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    Transfer and development length of strands in post

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    Automatic measurement and warning of tension force reduction in a PT tendon using eddy current sensing. ... 15.2-mm diameter, mono-strand tendon that was tensioned using a universal testing machine ... and the overall size of the ECS is less than 20-mm in diameter and 2.0-mm thick.

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    In prestressed concrete construction, steel tendons are stretched and ... of two, three oifour, are individuallytensioned using a mono-strand stressing jack. The live-end anchorage comprises a metal casting, wedges and plastic fittings ... a 75 mm thick topping is needed and, for a 4-hour fire period,

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    Post-Tensioning Tendon Installation and Grouting Manual

    This ribbed slab is supported by two 160 mm thick webs ... The transverse ribs were prestressed by one or two 0·5 in, sheathed and greased mono-strands. Specially adapted, small anchors similar to those used in the construction of Sherbrooke footbridge4 were used to transfer the prestressing forces from the strands to the material.

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    Prestressed concrete (PC) has been widely used as a cost-effective and efficient method of bridge construction. ... In this experiment, the concrete was replaced by the thick end plate while the spacer plate served as the anchor plate. The wedge ... The tendon was incrementally tensioned by hydraulic stressing jacks that react against the two ...

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    Appendix A - ABC Case Studies | Innovative Bridge Designs

    The stressing sequence for the external tendons using two mono-strand sets was also developed so that equal stressing force was applied to the structure. All the work inside the ring box was carried out by hand – it was not possible to use a crane as there were no openings in the top of the ring structure and cross-walls precluded the use of ...

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    Post- Tension Tendon Installation and Grouting Manual …

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    Testing the SSL Slab Post Tension Ing System.pdf - [PDF

    Post- Tension Tendon Installation and Grouting Manual 2013 - Ebook download as PDF File (.pdf), Text File (.txt) or read book online. Post-Tensioning Tendon Installation and Grouting Manual

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    Findings and Applications - The National Academies Press

    Testing the SSL Slab Post Tension Ing System.pdf. Home; Documents; Testing the SSL Slab Post Tension Ing System.pdf; Post on 10-Oct-2014. 71 views. Category: ... The load was then reduced to 50% MBL and the backpressure in the mono-jacks was noted and the load was increased back up to 75% MBL in each strand by increasing the pressure in the ...

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    Washington, DC: The National Academies Press. doi: 10.17226/22479. ... Indicate the frequency of encountering corrosion that requires corrective action of prestressing strands in precast concrete products. In spite of the different nomenclature adopted from each state, it was possible to distinguish seven types of structures. ...

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    External Prestressing in Bridges | Prestressed Concrete

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    Pre Stressed Concrete, A Fundamental Approach, 5th Ed

    A tensioning jack (t9 strands of 15 mm) pl aced at an abutment of the bridge (photo M. V.) . Figure49: ... The mono- strands are stressed one by one. ... stressing of the prestressing steel. If …

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    The strands are stressed individually by means of a mono strand jack. The strands are contained in one flat duct which is made of corrugated galvanized or non-galvanized metal.

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    Transformer Engineering - dotorresg - MAFIADOC.COM

    The wobble factor can normally be neglected Dimensions in mm, subject to modifications Dimensions for smooth plastic ducts Dimensions for steel pipes Equation of loss of post-tensioning force along a tendon Px = Remaining force at distance x from the stressing end Po = Stressing force at the stressing end μ = Friction coefficient φx ...

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    Dictaat Prestressed Concrete Cie4160 - StudeerSnel.nl

    The volt-time characteristics of the oil under DC voltage application are reported in [13,18] for plane-plane electrode; the DC breakdown voltage shows a rapid rate of decrease for stressing time till 100 seconds, after which there is hardly any decrease.

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    Concrete Bridge Code 2014_6 - PDF Free Download

    In the first stage, the responses from a BMS with ball diameters of 8, 12, and 15 mm were compared to those from conventional cone-plate geometry with two different polymer dispersions. ... stressing levels generated and pressure drop. In ... Design of a new spoon-thick consistency oral nutrition supplement using rheological similarity with a ...

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    3 Buildings - PDF Free Download - edoc.site

    The longitudinal post'-tensioning lay­out was conventional with straight 19 x 13 mm strand tendons placed within the top slab and anchored at the segment joints, close to the top of the webs, 32 tendons were used in each typical cantilever. ... A 75 mm thick reinforced overlay is applied to the bridge at the end of construction according to ...

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    The grouted tendons are small sized with up to 6 strands and a prestressing force of P0 = 1.1 MN, in order to fit into the member sections (Fig. 5). ... The lowering of the falsework was controlled by a system of hydraulic jacks. The erection of the large span structure required a total time of 4 months. ... This 400 mm thick structure covering ...

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