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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 the foundation of conventional structures, the onshore wind turbine circular foundation has the characteristics of significant load dynamic effect and large section size. Based on the failure mode of the circular plate foundation of conventional structures, the ultimate load of the fan foundation under the main failure mode is theoretically deduced by using the limit equilibrium method, and the influence of the parameters such as the basic cross-sectional dimension of the fan and the radius of the radial ring reinforcement is analyzed . The analysis shows that the bearing capacity of the circular foundation of the fan is determined by the failure modes of the overhang cantilevered blocks and the other failure modes can not control the load. The formulas for calculating the bearing capacity of long-overhang cantilevered circular foundation of the chimney are not suitable for the basic design of the fan. The calculation formula of the circular bearing capacity of the fan and the corresponding design proposal are put forward, which is expected to provide a useful reference for the formulation of the fan foundation specification and the design of the basic engineering.