The typical location and number of anemometer towers in the assessed area are the key to the accuracy of wind resource assessment in complex topography.As calculation examples,this paper used two typical complex topog...The typical location and number of anemometer towers in the assessed area are the key to the accuracy of wind resource assessment in complex topography.As calculation examples,this paper used two typical complex topography wind farms in Guangxi,Yunnan province in China.Firstly,we simulated the wind resource status of the anemometer tower in the Meteodyn WT software.Secondly,we compared the simulated wind resource with the actual measured data by the anemometer tower in the same situation.Thirdly,we analyzed the influence of anemometer tower location and quantity in the accuracy of wind resource assessment through the comparison results.The results showed that the range which the anemometer tower can represent is limited(<5 kilometers),and the prediction error more than 5%.Besides,the anemometer towers in special terrain areas(such as wind acceleration areas)cannot be used as a representative choice.The relative error of the simulated average annual wind speed by choose different number of anemometer towers is about 4%,and the grid-connected power generation more than 6%.The representative effect of anemometer towers is of crucial for improving the accuracy of wind resource assessment in engineering applications.展开更多
The precast segmental column(PSC)plays a vital role in both the design of new bridges and the rehabilitation of existing ones.Previous studies of PSCs have primarily focused on their individual seismic behavior.Howeve...The precast segmental column(PSC)plays a vital role in both the design of new bridges and the rehabilitation of existing ones.Previous studies of PSCs have primarily focused on their individual seismic behavior.However,research on the seismic performance of entire bridges supported by PSCs,particularly those incorporating soil-structure interaction(SSI),remains limited.Moreover,the amplification of earthquake waves as they propagate along the pile foundation to the surface,coupled with the coherency loss between earthquake motions at varying supports,may further impact the seismic responses of such bridges.This study systematically assesses the seismic performance of a PSC bridge(PSCB)supported by pile foundations considering the effects of SSI and depth-varying multi-support ground motions.Moreover,a benchmark bridge with the traditional monolithic column is also analyzed for comparison.The seismic fragility of bridges is calculated based on nonlinear time history analyses and joint probability density functions for both peak and residual responses.Parameter studies are conducted to reveal the influences of sSI,non-uniform excitation,and depth-varying earthquake loads on seismic performance assessments.This paper offers valuable insights for the reliable analysis of seismic response and fragility and the safety design of PSCB systems.展开更多
基金the financial support by the National Natural Science Foundation of China(No.52176212).
文摘The typical location and number of anemometer towers in the assessed area are the key to the accuracy of wind resource assessment in complex topography.As calculation examples,this paper used two typical complex topography wind farms in Guangxi,Yunnan province in China.Firstly,we simulated the wind resource status of the anemometer tower in the Meteodyn WT software.Secondly,we compared the simulated wind resource with the actual measured data by the anemometer tower in the same situation.Thirdly,we analyzed the influence of anemometer tower location and quantity in the accuracy of wind resource assessment through the comparison results.The results showed that the range which the anemometer tower can represent is limited(<5 kilometers),and the prediction error more than 5%.Besides,the anemometer towers in special terrain areas(such as wind acceleration areas)cannot be used as a representative choice.The relative error of the simulated average annual wind speed by choose different number of anemometer towers is about 4%,and the grid-connected power generation more than 6%.The representative effect of anemometer towers is of crucial for improving the accuracy of wind resource assessment in engineering applications.
基金supported by the National Natural Science Foundation of China(Grant Nos.52422809 and 52027811).
文摘The precast segmental column(PSC)plays a vital role in both the design of new bridges and the rehabilitation of existing ones.Previous studies of PSCs have primarily focused on their individual seismic behavior.However,research on the seismic performance of entire bridges supported by PSCs,particularly those incorporating soil-structure interaction(SSI),remains limited.Moreover,the amplification of earthquake waves as they propagate along the pile foundation to the surface,coupled with the coherency loss between earthquake motions at varying supports,may further impact the seismic responses of such bridges.This study systematically assesses the seismic performance of a PSC bridge(PSCB)supported by pile foundations considering the effects of SSI and depth-varying multi-support ground motions.Moreover,a benchmark bridge with the traditional monolithic column is also analyzed for comparison.The seismic fragility of bridges is calculated based on nonlinear time history analyses and joint probability density functions for both peak and residual responses.Parameter studies are conducted to reveal the influences of sSI,non-uniform excitation,and depth-varying earthquake loads on seismic performance assessments.This paper offers valuable insights for the reliable analysis of seismic response and fragility and the safety design of PSCB systems.
