Design and Test of Dynamic Model of Steel Braced Frame-bent Structure in Thermal Power Plant

To solve the problem of comparison between calculation and test of steel braced frame-bent structure model, and to study the dynamic characteristics and seismic response of steel braced frame-bent structure system, the SAP2000 software was used to establish the finite element model of prototype structure and improve the original design based on the structural design and PKPM calculation model of a large electrical power plant. Aiming at the structural system with complex mass and stiffness distribution characteristics, the design principles and relevant technical measures of shaking table test physical model to meet the requirements of structural dynamic characteristics consistency were proposed. The structural design, finite element modeling analysis under the same condition and physical model processing were completed for the scaled structure model. Through the shaking table test of physical model and the time-history analysis of finite element model, the first three order dynamic characteristics of the prototype structure and the shaking table test model were basically consistent with the results of the finite element modal analysis. The dynamic response of the experimental structure model under the action of seismic wave and the time-history analysis results of finite element model were mutually verified. Results show that the design principle of shaking table test model proposed in this paper is effective, and the results of test and calculation analysis can be verified mutually, which can provide a basis for further study of seismic performance of structures and improvement of structural design.