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Shear behavior of anchor blocks in externally prestressed

Shear behavior of anchor blocks in externally prestressed concrete bridges. ... local bearing design of concrete anchor blocks, ... coupling joints in prestressed concrete bridge girders.

Analysis and design of floating prestressed concrete

In particular, two vessels were constructed of prestressed concrete (PC) precast cellular modules during World War ... large structures can be assembled with precast components integrated by post-tensioning tendons and cast-in-place (CIP) joints, leading to easier construction; ... The theory of cumulative damage uses a stress histogram ...

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Horizontally curved tendons are installed within the concrete wall to form a series of "hoops" spaced vertically up the structure. ... 594–598 Initial works have also been successfully conducted on the use of precast prestressed concrete for road ... Concrete stave silos are constructed from small precast concrete blocks with ridged grooves ...

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Design of prestressed concrete bridges | ICE Manual of

ICE Manual of Bridge Engineering. Design of prestressed concrete bridges ... when designing post-tensioned structures allowance is made for the future installation of an additional 10% or more of prestress, which can be easily incorporated with external tendons. ... By considering the concrete block with the anchor force on one side and the ...

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Repair and strengthening of concrete structures

The requirements for concrete cover are the same as for ordinary prestressed concrete structures. ... shear con nectors made of steel anchors or bonded and/or anchored small concrete blocks (Figure 28). ... can be made of bonded and/or anchored small concrete or steel anchors, while in the case of precast concrete or stiffened steel panels they ...

Anchor bolt - WikiVisually

Prestressed concrete – Prestressed concrete is a concrete construction material which is placed under compression prior to it supporting any applied loads. A more technical definition is Structural concrete in which stresses have been introduced to reduce potential tensile stresses in the concrete resulting from loads.

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Prestressed Concrete; Precast Concrete; Reinforced Concrete ... etc. B. 79 Prestressed concrete Descriptions and data sheets relating to materials and prestressing systems available. ... Gifford and Partners Parasitic forces Stress profile Serial construction Loss of prestress Anchor block design Page No.H.Data sheets and illustrations The ...

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(PDF) Lateral Seismic Performance of Multi-Panel Precast

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C478 Specification for Precast Reinforced Concrete Manhole Sections ... equipment, anchors, steps or ladders, pipe supports, attachments, lifting points, tappings, drains, piping, valve, fittings, float switches and access cover and locking hardware. ... The motor and pump shall be designed and assembled by the same manufacturer. 7. The motor ...

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The intermediate support was founded on a precast concrete pad foundation, ... settlement. The shuttering for the deck consisted of a series of boxes assembled on the . platform. This type of falsework can adapt easily to vertical and horizontal curves. ... The prestress anchors were encased in the precast end blocks shown in Figure 15.5.

High-Force-to-Volume Seismic Dissipators Embedded in a

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Assembled In Situ-type Anchor Or Tie Patents and Patent

PRESTRESSED CONCRETE. ... post-tensioning is referring to the post-tensioning required to control stresses during handling and erection of precast elements. ... Anchorages and couplers shall develop at least 95 percent of the minimum specified ultimate strength of the prestressing steel. The coupling of tendons shall not reduce the elongation ...

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An additional actuator at midheight of the gravity beam simulates the precast one-way floor panels with a constant 120 kN load spread over a 1.5 m timber block. At one end of each prestress thread-bar anchor, load cells measure the forces in the thread-bars.

Precast modular concrete shapes and methods of

Search for Assembled In Situ-type Anchor Or Tie Patents and Patent Applications (Class 52/698) Filed with the USPTO. ... A lifting apparatus to be embedded within a precast concrete panel or slab to enable the panel to be lifted, positioned atop a road bed, and elevated above the road bed. A lifting apparatus is located at each corner of the ...

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Dec 10, 2002· Precast modular concrete shapes and methods of installation to form shoreline stabilization, marine and terrestrial structures ... The boxes can be sized and proportioned so as to be conveniently assembled in such structures and to be easily transported via intermodal transportation media. ... FIG. 19 is a top view of a series of ...

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Unbonded post-tensioned concrete Unbonded post-tensioned concrete differs from bonded post-tensioning by providing each individual cable permanent freedom of movement relative to the concrete. The transfer of tension to the concrete is achieved by the steel cable acting against steel anchors in the perimeter of the slab. Tendons can be easily ...

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A. Basis of Design: Provide site assembled precast wastewater utility pumping station, including specified controls, pumps, valves, internal piping, and precast concrete well by manufactured and furnished by Jensen