Seismic analysis of boiler steel frame

As the support of boiler components, the seismic performance of boiler steel frame must be ensured. Taking a steam boiler steel frame as the research object, its finite element analysis model was built with I-DEAS software. To execute the Response Spectrum analysis, the modal mode was generated using the Response Dynamics solver to obtain the normal modes and the constraint modes. According to the Modal Response Spectrum method, the seismic acceleration response spectrum curve was created. Then the earthquake action of the steel frame was calculated, and its seismic strength was checked. Results show that the maximum displacement-angle is 1/385, the value is above the permissible value, the stiffness need to be enhanced. Otherwise the strength is enough to meet the specification.