For the combination of boiler steel frame and front coal bunker in a large power plant,the seismic performance under frequent and rare earthquake conditions was researched by using ABAQUS finite element software,and analyses were conducted on the seismic time-history response and the influence of beam-column connection type on the seismic performance of the structure system.Subsequently,the torsional deformation of structure with beam-column pinned connection under rare earthquake condition was quantitatively evaluated based on torsional angle,and corresponding measures were proposed to reduce the torsional deformation.Research results show that,the overall stiffness of structure would be influenced by the beam-column connection types,and the application of a structural system with beam-column pinned connection may result in lower overall stiffness,leading to increased structural deformation.Both articulated structures with additional reasonable braces and rigidly connected structures demonstrate good seismic performance,while articulated structures are more economical.
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