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为了解决目前火电厂主厂房此类特殊工业建筑的性能指标不确定及设计中存在的问题,进行主厂房结构的抗震性能试验研究,提出采用基于位移的抗震设计方法。通过试验研究,给出了不同地震作用下结构的破损形态及变形性能指标,结合前期研究成果,确定了主厂房结构的抗震性能目标,采用层间位移角限值作为结构性能水准的量化指标。给出了基于位移的设计方法在主厂房设计中的应用关键点及设计步骤,运用此方法进行某火电厂主厂房不同性能水准下的计算分析。结果表明,应用基于位移的设计方法可以有效地保证不同强度地震作用下结构及设备的安全,尤其是对罕遇震作用下结构的破坏控制;给出的相关设计指标满足要求,可供同类工程设计时参考和应用。
In order to solve the uncertainty of the performance index and the existing problems in the design of such special industrial buildings in the main plant of the thermal power plant, the seismic performance test and study of the structure of the main plant is carried out and the seismic design method based on displacement is proposed. Through the experimental study, the damage morphology and deformation performance of the structure under different earthquake actions are given. Combined with the previous research results, the seismic performance of the main building structure is determined. The layer displacement angle limit is used as the quantitative index of the structural performance level. The key points and design steps of the displacement-based design method in the main plant design are given. The calculation and analysis under different performance levels of the main plant of a thermal power plant are carried out by using this method. The results show that the application of displacement-based design method can effectively ensure the safety of structures and equipment under earthquake with different intensities, especially for the structural damage control under rare earthquakes. The relevant design indexes are given to meet the requirements of similar projects Design reference and application.