VHPD Pendulum Bearing is designed based on the working principle of a pendulum. They allow the horizontal displacement of structure, providing the required shift in the natural period of the structure. Once activated by an earthquake, the isolators will allow the decoupling of the supported structure from the ground motion. After the seismic event, the restoring force due to gravity will bring it back towards the center position. The performance of the device mainly depends on its radius of curvature and the coefficient of friction.

VHPD Pendulum Bearing includes two primary curved sliding surfaces. This allows higher horizontal displacements to be facilitated with smaller dimensions. It includes a rocking element equipped with an articulated element that allows the bearing to accommodate rotations. This is an essential feature, especially for bridges which require high displacements and significant rotational capacity.

To ensure the long-life durability, VHPD Pendulum Bearing is protected against corrosion by the following methods: two-component epoxy coat, PU-based painting (Polyurethane) in accordance with the corrosion categories specified in ISO 12944 (TCVN 12705). In particular, the Al–Mg thermal spraying method (at the ratio of 95% Al and 5% Mg) ensures the anti-corrosion durability of up to 100 years, proven by salt-spraying test in 12.000 hours (8-hour dry-wet cycle repetition) under ASTM B117 standards.