Study On Mechanical Characteristics And Structural Optimization Of Anchorage Of Fan Foundation Ring

Wind power generation is one of the best prospects for commercialization of new energy sources and the most developed power generation methods.In recent years,the wind power industry in China has made great progress,many domestic wind farm projects have been completed and put into use one after another,however,there are also problems in the process of large-scale development,it is mainly due to the fact that there is no consensus on the anchoring mechanism and bond stress transfer characteristics of the basic rings and concrete in the specifications of various countries.This article designed the pull test of basic ring anchorage,we studied the influence of the addition of end plates and transverse ribs on the basic mechanical properties and failure characteristics of the specimen under different depths of burial depth.The main research content of the paper is as follows:(1)Analyzed the research progress of fan-based bonding and anchorage theory at home and abroad,then summed up the anchoring mechanism between the foundation ring and the concrete and the failure mechanism of the fan foundation.(2)Based on the fan foundation ring in the actual project,were designed 6 groups(3 in each group)of different configurations of drawn specimens,analysis of its failure morphology,load-relative displacement curves,and strain distribution of steel plates,we found that the addition of transverse ribs can effectively improve the phenomenon of stress concentration in the concrete where only the end plate of the end plate test block is added,added the end plates and transverse ribs Simultaneously can increase the ultimate bearing capacity and ultimate relative displacement of the test piece greatly.(3)The calculation method of ultimate bearing capacity is proposed for drawing specimens with different configurations,The experimental values are in good agreement with the calculated values,Proved that the calculation method is rationality.(4)Simulated of the fan foundation based on the test,studied the transfer and distribution law of internal bond stress of fan foundation.The simulation results are in good agreement with the test results,tested and verified the validity of the test and simulation,it can provided reference for wind turbine foundation engineering.