TLS-50MJ Carbon Fiber Board Prestressed Anchorage

Prestressed Carbon Fiber Board Anchorage Unidirectional Tensioning System

Advantages of TLS-MJ-D Prestressed Carbon Fiber Board Anchor Unidirectional Tensioning System

▲ Suitable forlarge-span and large stress application

▲ The enlire system is developed using assembly technology and can be flexibly adjusted during assembly andinstallation

▲ When one end of the applied stress cannot meet the travel requirements,both ends can be simultaneouslystressed,espe cially suitable for large-span T-beams,box beams,and basement layouts to fix the hole position andincrease the fixed hole position is of great help in avoiding steel bars when planting anchors,and later cooperatingwith shear adjustment sleeves can also make theanchors shear atthe same time

▲ Increasing the fixed hole position is of great help in avoiding steel bars when planting anchors,and latercooperatingwith shear adjustment sleeves can also make the anchors shear at the same time

TLS-MJ-D Tension design value and tension control value of prestressed carbon fiber plate

Note: The data in this table are calculated based on critical components. According to Clause 11.4.2 of GB 50367-2013, the tensioning control stress should be 0.6–0.7 times the design tensile strength of the carbon‑fiber composite material; the value used in this table is 0.7 times. The specific tensioning control force shall be determined in accordance with the design drawings. For further details, please contact the Technical Department of Nanjing Tianlixin.

Construction Process of Prestressed Carbon Fiber Board Anchorage Tensioning System

1. According to the design requirements of the drawings, lay out the lines. First,confirm the centerline of the carbon plate's position,and thenconfirm the installation positions of the anchor plates at both ends.

2. Polish towards both sides based on the centerline,with a polishing width of about 2cm greater than the width of the carbon plate on oneside.After polishing,clean the concrete surface of the beam to ensure a smooth and dust-free bonding surface.Apply leveling glue to theconcave part of the beam surface for leveling.

3. Slot according to the drawing requirements,measure the drilling position in the slot according to the drawing,level the bottom of the slot,and plant bolts(  ①   drilling,  ②   leveling,  ③   planting,wrap the  exposed  part of the thread with wrapping film when planting on the back toprevent the later planting of reinforcement glue from hanging on the thread and causing the nut to be unable to be installed).The levelingthickness in the slot should not exceed 5mm.

4. After the rebar glue of the rebar screws reaches the stress standard,install theanchor plates at both ends.The centers of the anchor  platesat both ends mustoverlap with the central line of the pay-of line to ensure that the anchor platesat both ends are on the same central axis. Rotate or horizontally adjust theanti-shear adjustment sleeve until there is no gap between the anchor bolt andthe anchor plate,and thenscrew on the nut. Keep a gap of about 3 mmbetween the anchor plate and the substrate surface to facilitate the laterinstallation of thecarbon plate fixture.

5.Install the combined carbon plate and fixture onto the anchor plates at both ends, tighten the nuts appropriately, install tensioning tools, and pre tension the carbon plate (pre tension value 20kN-30kN) to check if the central axis is consistent with the carbon plate axis. If any discrepancies are found, adjust the anchor plates on both sides.

6.After the pre tensioning is normal, return the oil to the jack, and if necessary, remove the jack to place the carbon plate in a suspended state. Tighten the nut and start applying glue to the side of the carbon plate in contact with the concrete. The glue should be applied so that the middle is higher and the sides are lower, forming a fish spine shape. After applying the adhesive, immediately perform graded tensioning in the following order: 0 → 20% → 40% → 60% → 80% → 100% → hold the load for 5 minutes. During the tensioning process, the elongation should be measured synchronously. Tensioning adopts dual control of tensile stress and elongation.

7.Install the steel plate pressure strip,tension it to the design tonnage,hold the load for 5 minutes,and observe the stable force value beforeremoving the tensioning equipment and starting to install the steel plate pressure strip according to the stel plate pasting process. After thesteel plate pressure strip is tightened,remove the glue squeezed out on both sides of the carbon fiber board,trim andfill the edges,filthemissing glue parts,and wipe offthe residual glue on the surface of the carbon fiber board.

Advantages and Parameters of the Carbon Fiber Reinforced Prestressed System

I. TLS-CFB-MJ Tianlixin carbon fiber reinforcement anchor has multiple significant advantages, with outstanding performance in fatigue performance and construction efficiency. The following is a detailed analysis of its main advantages:

▲ Lightweight advantage: Weight reduction of 40%~50%:

▲ The anchor system can achieve simultaneous tensioning of single and multiple carbon fiber reinforcement bars.

▲ Bridge bearing capacity and real-time stress detection can be achieved by installing stress sensors.

▲ The anchoring system can be customized and produced according to project needs.

II The entire system of corrosion-resistant carbon fiber reinforcement and supporting anchors (such as stainless steel) do not require additional anti-corrosion treatment and are suitable for corrosive environments such as marine environments, chemical plants, and saline soils.

▲ By adjusting the direction of the carbon fiber layer, the axial tensile strength of the reinforcement material can be customized (typical value 1100~1800 MPa) to meet different anchoring requirements.

▲ High fatigue performance with 2 million cycles of load without damage.

Carbon fiber reinforcement can still maintain a static strength of over 95% after fatigue testing, making it particularly suitable for structures that can withstand dynamic loads, such as railway bridges.

▲ Low stress relaxation rate: Long term prestress loss is only 1% to 2%.

III. Design flexibility and customizable performance: Anisotropic optimization :

▲ Strong adaptability of anchors: Bonding type, mechanical type and other anchoring schemes can be flexibly selected according to construction conditions.

▲ The diameter of carbon fiber bars can be customized according to the project (typical diameters: φ8mm, φ10mm, φ12mm).

▲ Construction speed is increased by more than 60% to steel strands.

TLS-CFB-MJ Detail drawing of single anchor assembly

Note: The above table shows the tension stress values for a single carbon fiber bar. If multiple carbon fiber bars need to be tensioned simultaneously, please consult the technical department of Nanjing Tianlixin for specific stress parameters.

TLS-CFB-MJ Tensile force parameter

Note: The data in the table is based on the upper limit of the tensile strength value of a single carbon fiber reinforcement in section 10.1.4 of GB50608-2020, which is 0.65 times the standard tensile strength value, and the lower limit of the tensile strength value is 0.4 times the standard tensile strength value. The specific tension control force value must be in accordance with the design drawings. For details, please call the Technical Department of Nanjing Tianlixin.

Construction Process of Prestressed Carbon Fiber Board Anchorage Tensioning System

1. Installation of anchor support: Polish and clean the concrete surface at the support, and install the fixed or tensioned end anchor steel support.

2.Installation of prestressed carbon fiber reinforcement: Arrange the prestressed carbon fiber reinforcement at the design position, connect it to the fixed end and tensioning end anchor support respectively, and also connect the tensioning end tool pull rod, tool baffle, etc. Install the calibrated jack, apply a 20% pre tensioning force value by a kilogram, straighten the prestressed carbon fiber reinforcement, and adjust the tensioning end and fixed end anchor support separately to ensure that the tensioning end anchor support, fixed end anchor support, and prestressed carbon fiber reinforcement are in a straight line.

3. Tensioning prestressed carbon fiber reinforcement; Before starting the formal tensioning, the prestressed carbon steel reinforcement must be straightened again as a whole. After confirming that there are no errors, it should be tensioned in stages according to the design values of 0%~20%~40%~60%~80%~100%. If there is no tension in one stage, pause for 3-5 minutes before tensioning the next stage. After the design value of tensioning reaches 100%, hold the load for 10 minutes, lock the fixing nut, and remove the tensioning equipment.