SEISMIC CONSIDERATION FOR HIGH RISE CONCRETE WIND TURBINE TOWERS
Globally increasing demand and cost of energy motivate the Shanghai Science and Technology Development Committee wind energy research program to develop a large wind turbine (LWT) technology that will allow wind systems to compete in regions of low wind speed. Most of current wind turbine powers on world are less than 1.0 MW supported by tubular steel towers and their tower height less than 80 meter. Earthquake load may not be significance to the tower design due to following reasons; first, wind turbine towers often are placed in wide-open fields and high wind gust areas, the wind load from the turbine and direct wind pressure on the tower usually governs the design of the tower; second, steel tubular tower structures usually are lighter than concrete structures, thus, they have less seismic inertial force than that of concrete tower. For large wind turbine towers with the turbine head weight getting heavier, the seismic load very likely becomes governing loading case for a pre-stressed concrete tower, especially in region of the high seismic zones. As tower getting taller and support large turbines, pre-stressed concrete tower solution becomes more competitive in overall cost in the latest study. In this paper a series height of the pre-stressed concrete towers segmental stacked and post-tensioned by tendons are studied and compared with steel tubular towers under prescribed seismic load under different design code including China GB, US IBC 2003 and Euro-code. The tapered tower fundamental dynamic properties are estimated by the Raleigh-Ritz method and compared with FEM results.
High rise structural systems Wind turbine tower Seismic design Prestressed concrete tower
Henry Huang Jim Ma Rong Xu XiaoWei Wu
Technical Director, WSP Asia, Hong Kong. P. R. China Senior Technical Specialist, California Department of Transportation, Sacramento, California,USA Senior Specialist, Palmer Turner Corporation (China), Shanghai, P.R. China Technical Director, Shanghai WAY Metal Structures Limited, Shanghai, P.R. China
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）