Viscous Fluid Damper Construction Procedure

Step 1: Embedment Installation After Wall Steel Bar Binding

The first critical step in viscous damper construction begins after the completion of wall steel bar binding. Before installing embedded parts, construction teams must refer to the structural drawings to accurately determine the installation positions of the embedments. Precision is key here-any deviation from the specified locations can compromise the damper's functionality and the overall structural integrity.

Once the positions are marked, ensure all embedded parts are perfectly horizontal. This horizontal alignment is vital to ensure the viscous damper operates smoothly and evenly distributes forces during use. After confirming alignment, weld the embedded parts firmly to the wall steel bars, using appropriate welding techniques to guarantee a secure, load-bearing connection. Proper welding prevents loosening over time, even under seismic stress or continuous vibration.

Step 2: Concrete Pouring

After the embedded parts are welded and inspected, the next step is concrete pouring. Pour the concrete carefully around the embedded parts, ensuring full coverage and no air pockets. The concrete should be of the specified strength grade, as outlined in the project drawings, to provide a stable base for the subsequent installation of the viscous damper components. Allow the concrete to cure completely according to industry standards before proceeding to the next stage-premature installation can damage the concrete and weaken the connection points.

Step 3: Lower Connecting Plate Installation and Welding

Once the concrete has fully cured, it's time to install the lower connecting plate. Position the lower connecting plate precisely on the embedded parts, aligning it with the pre-marked positions to ensure compatibility with the viscous damper body. After positioning, weld the lower connecting plate firmly to the embedded parts. The welding must be thorough and uniform, with no gaps or weak points, to withstand the forces exerted by the viscous damper during operation. Inspect the welds carefully to ensure they meet structural safety standards.

Step 4: Connect Viscous Damper Body to Lower Connecting Plate

With the lower connecting plate securely welded, the next step is to connect the viscous damper body to the lower plate using pin shafts. Select pin shafts that meet the project's load-bearing requirements, as specified in the design drawings. Insert the pin shafts through the pre-drilled holes in both the damper body and the lower connecting plate, ensuring a tight, secure fit. This connection must be firm to prevent any movement or play, which could reduce the damper's effectiveness in absorbing vibration and seismic forces.

Step 5: Lift Viscous Damper and Install Upper Connecting Plate

After securing the damper body to the lower connecting plate, use appropriate lifting equipment to raise the viscous damper to a horizontal position. This horizontal alignment is crucial for the damper to function as designed, as it ensures even force distribution. Once the damper is in the correct position, install the upper connecting plate at the designated location on the structure. Align the upper plate carefully, then weld it firmly to the structural frame, following the same rigorous welding standards as the lower plate. Ensure the upper plate is level and securely attached to avoid any misalignment that could impact the damper's performance.

Step 6: Connect Viscous Damper to Upper Connecting Plate

With the upper connecting plate welded in place, connect the viscous damper body to the upper plate using pin shafts. Again, use pin shafts that meet the project's specifications, and insert them through the pre-drilled holes in the damper body and upper plate. Ensure the connection is tight and secure, with no looseness or movement. This step completes the primary installation of the viscous damper, but final reinforcement is still required to ensure long-term stability.

Step 7: Reinforce Upper and Lower Connection Points

The final step in the viscous damper construction process is to reinforce the upper and lower connection points using locking plates. Locking plates add an extra layer of security, preventing the pin shafts from loosening due to vibration, seismic activity, or long-term use. Install the locking plates over the pin shafts, ensuring they are tightly fastened to the connecting plates. Inspect all reinforcement points to confirm they are secure and meet the project's safety requirements.