不同于常规构筑物基础,陆上风机圆形基础具有受荷动力效应显著、截面尺寸大等特点.以常规构筑物圆板基础破坏模式为基础,使用极限平衡方法,对风机基础在主要破坏模式下的极限荷载进行了理论推导,开展了风机基础截面尺寸、径环向配筋量等参量的影响分析.分析表明,风机圆形基础的承载力由基础外悬挑扇形块破坏模式确定,其他破坏模式不起控制作用;烟囱规范的长悬挑圆形基础承载力计算公式不适用于风机基础设计;本文提出了风机圆形基础承载力的计算公式及相配套的设计建议,可望为风机基础规范的制定和基础工程设计提供有益参考.%Different from conventional building foundation, obvious load dynamic effect and large size of cross-section characterize the circular foundation of onshore wind turbine. Based on the failure patterns of circular slab foundation for conventional building, limiting equilibrium method is adopted to carry out theoretical derivation of limit load on wind turbine foundation in major failure patterns, and make impact analysis of the parameters including the section size and radial reinforcement of wind turbine foundation. The analysis results show that the bearing capacity of circular foundation slab is determined by the failure pattern of fan-shaped cantilever block and other failure patterns do not apply. Code of chimneys includes the calculation formula for the bearing capacity of long-cantilever circular foundation, which isn't suitable for the design of wind turbine foundation. Thus a new formula for calculating the bearing capacity of wind turbine circular foundation and relevant design suggestions are proposed, which may serve as a reference for the establishment of code of wind turbine foundation and the design of foundation engineering.
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