Abstract
A complex structural, static and dynamic review of an existing steel ceiling has been realised after two years of service and the completion of subsequent construction work. The construction work involved the reconstruction of a steel structure and structural modifications to the ceiling, which is part of the production hall. The construction work was realised in order to reduce the vibration response of the ceiling. The interior of the steel structure was supplemented by steel structural elements to share the load transfer of automatic washing machines. The structural behaviour of the ceiling was monitored before and after the modification. Accelerations of the ceiling were time-domain-monitored at specific locations. Measured data was transformed to the spectral-domain which is represented by power spectral densities.
Highlights
Vibrations may occur in wide range of applications in civil engineering structures
After renovation works and structural modifications of the steel structure located at a height of +10.5 m completed in 2013, the hall was used for two years as a laboratory space designed for testing automatic washing machines
The load bearing steel ceiling in terms of limit state assessment of the permissible maximum vertical deformation is satisfied and the steel beam lies in the elastic range
Summary
There is an important point in design of structures whether the response of the structure will be static or dynamic under considered load. Some loads are considered as static, they produce a dynamic response, which means the dynamic response is negligible when comparing to static load. Another case is, if the response is dynamic, to calculate a quasisteady response, which is usually represented by response multiplier. The important issue of dynamic analysis is to consider increased response of the structure, such as higher deflections, higher stress and the influence of fatigue. A static and dynamic assessment of a load bearing steel ceiling structure is conducted after two years of operation and the completion of subsequent static/construction modifications of a steel production hall functioning as a factory tool room
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