The project is located in high intensity area,there are torsion irregularity,eccentric layout,floor discontinuity,size mutation and local irregularity.In view of the above irregular items,a special analysis was carried out,at the same time,a reasonable structural performance target was formulated,and the structural performance was verified by calculation and analysis.There is a large span space of 26m×41m in the podium,and the structure with steel arch was adopted.The geometric shape of the steel arch was optimized through parametric technology to improve the structural stress.Special analysis was conducted on the elastic-plastic,comfort,vertical earthquake,node,and stability construction simulation of steel arch structure.At the same time,the internal force caused by the horizontal seismic force of the arch structure in the high intensity area was compared in the scheme of increasing the cable.However,the response spectrum method can not consider the situation that cables are forced out of service,and its calculation method needs further study.Similar engineering can also consider the internal force of the relevant bar after time history analysis of multi wave calculation results.