全直桩码头转动刚度对水平力分配的影响

Influence of rotational stiffness on distribution of horizontal forces on all-vertical-piled wharf structures

针对全直桩码头在水平力作用下相对于叉桩码头易产生转动的特点,分析全直桩码头在水平方向转动刚度的计算方法,推导得出考虑转动刚度影响的全直桩码头水平力分配的计算公式。结合工程算例,分别计算了在横向水平力作用下3种宽长比的全直桩码头的转动刚度及各横向排架的水平力分配系数,并与有限元法、规范法的计算结果进行比较。结果表明,全直桩码头宽长比越大,码头转动刚度越大,各排架的水平力分配系数越均匀;本文公式的计算结果和有限元结果吻合较好,随着码头转动刚度增大,本文公式计算值与规范值相差增大,最大水平力分配系数最多相差22%。

Aiming at the fact that all-vertical-piled wharf is prone to rotation than ranking-piled-wharf under the action of lateral force,we analyze the calculation method of rotation stiffness of all- vertical-piled wharf,and obtain a formula which based on rotation stiffness is derived to calculate the distribution of lateral force onall-vertical -piled wharf.Combining with an engineering example,we calculate the rotation stiffness and lateral force distribution coefficient of the wharf by the proposed formula in three different conditions of the width and length ratio.The results show that the increase of the width and length ratio will increase the rotation stiffness of the wharf,and make the lateral force distribution coefficient on each bent more uniform.The results obtained by the proposed formula agree well with the results by FEM (finite element method).As the rotational stiffness of the wharf increases,the difference between the calculated value of the formula and the norm value increases,and the maximum difference of the maximum horizontal forces distribution coefficient is22%.