烟囱高度超过210m时,采用等曲率法计算烟囱附加弯矩存在较大误差。提出了一种烟囱附加弯矩计算方法,该方法基于共轭梁理论,并对烟囱刚度进行折减。以某烟囱工程为实例,用该方法计算了烟囱在水平风荷载作用下的附加弯矩和水平变位。为了验证该方法的可靠性,应用有限元软件ANSYS的计算结果进行对比,算例结果证明了该方法的有效性。 Chimney height of more than 210m, the use of equi-curvature method to calculate the chimney additional bending moment there is a big error. A method for calculating additional moment of chimney is proposed. The method is based on the theory of conjugate beam and reduces the stiffness of the chimney. Taking a chimney project as an example, this method is used to calculate the additional bending moment and horizontal displacement of the chimney under horizontal wind loads. In order to verify the reliability of the method, the calculation results of finite element software ANSYS are compared and the results show that the method is effective.