在进行结构动力特性分析中能否正确处理节点刚性区问题关系到计算结果的准确性。为此对节点刚性区的形成原因和力学特性特别是刚性区刚度的变化进行了分析，并提出了可能的处理方法。在对各种方法的原理作了详细的理论分析后，以南京长江二桥桥塔的动力特性计算为算例，分别应用每种方法得出结果。通过计算结果同模型试验实测数据的比较，结合理论分析，确定了最佳的处理方法──刚性材料法。 The correctness of the calculation results can be dealt with correctly in the analysis of the structural dynamic characteristics. For this reason, the reasons for the formation of the rigid zone of the joints and the changes of the mechanical characteristics, especially the rigidity of the rigid zone, are analyzed and the possible treatment methods are proposed. After a detailed theoretical analysis of the principle of various methods, the dynamic characteristics of Nanjing Second Bridge were calculated as examples, and the results were obtained by using each method respectively. By comparing the calculated results with the measured data of the model test, combined with theoretical analysis, the best treatment method is determined ─ ─ rigid material method.