一、前言 桩基承台在外力作用下,桩及承台将产生位移和转动。由于桩基受到周围土的弹性抗力作用(如图1a所示),因此桩基结构内力的解算涉及到复杂的桩土相互作用问题。桩基结构考虑土的弹性抗力作用的计算方法有:常数法(张有龄法)、m法、K法,以及C法。用这些方法解算桩基结构一般都比较繁复,而且也难以按静力法计算动力荷载的 I. Foreword Under the action of external force, pile foundation and pile cap will produce displacement and rotation. Because the pile foundation is affected by the elastic resistance of surrounding soil (as shown in Fig. 1a), solving the internal force of pile foundation structure involves complex pile-soil interaction problems. Pile foundation structure to consider the elastic resistance of soil calculation methods are: constant method (Zhang Youling method), m method, K method, and C method. Calculating the pile foundation structure with these methods is generally complicated, and it is difficult to calculate the dynamic load by static method