针对FRP等距环肋加强的钢管混凝土柱，将FRP环肋与钢管间的集中线荷载展为沿轴向变化的富氏级数，将应力和位移看作一组“初等解”和一组“修正解”的叠加；“初等解”即为一般的二维理论所得的解答，而“修正解”应用勒夫(Love)位移函数法求得。并用FRP环肋与钢管表面位移连续条件，确定FRP环肋与钢管相互作用的未知线荷载，由此求得该问题的弹性理论解。通过计算实例表明，解的收敛性良好。

Based on theory of cylinders subjected to uniform internal pressure, the mechanical performance of a steel tubular column filled with equidistant fiber reinforced polymer (FRP)ringstiffening concrete is investigated. The solutions for the stress and displacement are regarded as the superposition of elementary and improved solutions. The elementary solutions are found by using twodimensional elastic theory. The improved solutions are found by using the Love displacement function method. Considering the conditions of the displacement continuum of the FRP ring and the steel tube exterior, a more accurate solution for an equidistantly FRPringstiffened cylinder subjected to a uniform internal pressure is obtained. Several numerical calculations are also carried out. The results indicate the solutions possess good convergence.

重庆市建委资助项目（200733）