PRECAST CONCRETE POST TENSIONED SEGMENTED WIND TURBINE TOWER

摘要

A post-tensioned precast segmental concrete tower has a stack of annularsegments with uniform cross-sections which varies over the tower height. Thetransition between tower segments occurs in stages and is achieved usingannularmembers or segments which support and anchor post-tensioning tendons thattransferloads passing through the tower as a result of a change in tower geometry. Thetowersegments are match cast against one another in fabrication to create tightmatchingopposing surfaces when placed into the tower and to create tight joints. Thematchcasting eliminates the need for grout between precast segments, resulting in afastertower erection time and high durability of the joints. All annular segmentshavehorizontal joints and no vertical joints. The tower geometry simplifies theformworksystem used to precast the segments, and the post-tensioning tendons tie allsegmentstogether and to the foundation.