Comparative Study On Seismic Performance Of Concrete-Filled Stell Tube Lattice Wind Power Towers With Different Webs

With the large-scale wind turbine,the design of the tower is becoming more and more prominent.In order to design the tower more effectively,the optimization of the abdominal rod is becoming more and more important.In this paper,using ABAQUS finite element analysis software,the load-receiving condition of 1.5MW cone-type wind turbine tower in Baiyun Obo region of Inner Mongolia is used as a reference,and the steel pipe concrete grid three-legged column wind turbine tower is designed,and the abdominal rod form of the tower is adopted Single-slope,cross-type,K-type and re-sectional,through numerical simulation methods,the different abdominal rod form tower under the seismic action of the mechanics analysis,combined with steel volume indicators,comprehensive assessment of different abdominal rod forms and steel pipe concrete column limbs of the collaborative performance,Damage form and seismic performance.Then,a finite element model of the whole tower of the tower in the form of single-slope,cross-type,K-type and re-sectional 4 kinds of abdominal rod is established,and the seismic response analysis is carried out,and the seismic response of the tower in different abdominal rod forms is studied.Finite element analysis software,its hysteresis performance is obtained and seismic performance indicators such as skeleton curve,stiffness degradation,delay and energy consumption capacity are analyzed based on hysteresis data.The results show that the cross-sectional abdominal pole tower and the concrete column limb of the steel pipe have the best performance and the best seismic performance,and the carrying capacity and seismic performance are optimized without significantly increasing the amount of steel used.Because the abdominal rod arrangement is asymmetrical,uneven and sparse,the co-working performance with the column limb is not good,and the carrying capacity and seismic performance are the worst.In the seismic response analysis of the whole tower,the overall stiffness distribution of the cross-slope rod-type belly-bar tower is more uniform,and the structure is better than that of the other three types of belly-bar-form tower,resulting in the smallest displacement response of the cross-slope rod-type belly bar tower,which is the best in all kinds of towers.