Seismic design of distribution plant building of 220 kV untopped precast RC indoor substation
Under the requirement of"Resource-conserving,environment-friendly and industrialization"of the State Grid,this article proposes a new building structure of untopped precast reinforced concrete(RC)indoor substation,consisting of precast RC frame and discretely connected precast RC floor(DCPCF).The modeling method used in the building structure of untopped precast RC indoor substation is presented,and the seismic response law of the distribution plant building of 220 kV untopped precast RC indoor substation is analyzed.The simulation results of the precast structure and the same type of cast-in-place structure are compared.The results indicate that the untopped precast RC indoor substation building meets seismic design code requirements,and the structural safety is reliable.The high-order vibration mode has a significant impact on the untopped precast RC substation buildings.Therefore,it is necessary to consider more vibration modes in the design of such structures.During bidirectional horizontal earthquake excitation,the precast RC floor with discrete connections exhibited substantial in-plane deformation,which led to the seismic response of this structure having a significant difference compared to its cast-in-place structure.In addition,stress analysis has been conducted on large opening parts of the floor.It has been observed that discretely connected precast RC floor exhibit lower stress levels compared to those of cast-in-place floor.The irregular arrangement of the structure engenders the presence of weak areas where some of the connections are located,therefore,it is recommended that reinforcing measures be taken in these vulnerable regions.The research findings have the potential to serve as a valuable reference for the study and application of untopped precast RC indoor substations.
NETL
NSTL
万方数据
