The UHV transmission line is lifeline engineering

however

the existing standards for the seismic provisions of UHV tower are not clear. We carried out modal analysis and response spectrum analysis of a typical cup-type tower constructed in UHV project. Firstly

a mixed model of beam and truss element was used

while the combination of the seismic effect and wind load effect was considered. Then

the most dangerous bars of cup-type steel tower under the action of earthquake were determined

and the response spectra under different seismic intensity conditions and different site classification conditions were analyzed. Finally

the ratio of the combined effect value of the seismic load to the conventional condition effect value was obtained

and a classification standard for seismic fortification of UHV cup-type steel tower is proposed. The results show that the UHV cup-type steel tower is built in the earthquake intensity area over 8 degrees

seismic checking computation should be done

and the bars that do not meet the seismic requirements need to be strengthened.