Shock Transmission Unit

A Bridge Shock Transmission Unit (STU) is a component used in the construction of bridges to mitigate the transmission of shock waves caused by seismic activity, traffic loads, or other dynamic forces. These units are designed to absorb and dissipate energy, reducing the impact on the bridge structure and enhancing its resilience and safety.

Bridge STUs play a critical role in ensuring the safety and longevity of bridge structures, particularly in regions prone to seismic activity or heavy traffic loads. They are designed and engineered according to specific project requirements, taking into account factors such as bridge geometry, anticipated loads, and seismic design criteria.

A shock transmission unit (STU)
is designed to be connected
between bridge structure components to form a rigid link under
dynamic loads induced by forces
such as vehicle braking and
earthquakes. At the same time,
the structure will be able to move
freely under slowly applied loads
such as temperature and creep
shrinkage.
The unit is connected between
elements of bridge structures
at expansion joints, or near the
bearings between the superstructure and the substructure.
The use of STU’s allows the load
sharing of a suddenly applied
force.