Rally investigated the vibration characteristics of the building, when subjected to condenser dynamic loads, by carrying out a time history analysis in FEM software. Mechanical vendor data was analyzed and compared to the actual field installation to quantify the dynamic loads being imparted on the building. Potential building modifications were explored using the FEM model.
A structural analysis was completed of the entire building to allow tuning of the building’s dynamic response and determine the required stiffening.
A construction work package was engineered and issued with the recommended modifications to the building’s structural bracing. Rally’s scope included the design of member connections.
Field engineering support was provided during construction, including a walk-down at completion and drawing “as-built” services. The additional bracing reduced the vibration amplitude by more than 80%.