船闸闸首横向荷载及不平衡剪力分配方法

为提高闸首底板分段法的计算精度及其适用范围，针对规范中横向荷载分配方法的不足，在深入分析边墩横向荷载扩散传递机理的基础上，提出并列铰接悬臂梁法；并首次进行横向整体平衡分析，给出横向不平衡剪力的分配方法。结合工程实例计算，证明横向荷载分配之后进行内力调整的必要性。提出的2结点并列悬臂梁法，能够考虑边墩高度的影响，并反映横向荷载、弯矩分配比例不同的特征。对于承受横向不对称荷载的闸首，还应进行横向不平衡剪力计算和分配。与有限元结果比较分析表明，经横向荷载分配、横向不平衡剪力分配、内力调整后，底板内力计算结果有较高的精度。

Allocation method about lateral load and unbalance shear force of the lock head

In order to improve the accuracy and extend the application scope of gate floor longitudinal segmentation method, as the lateral load allocation method of code for ship locks is inadequate, this paper analyzes the transfer mechanism of lateral load on side piers, proposes parallel articulated cantilever method, and for the first time to conduct the analysis of lateral overall balance, then provides allocation method of lateral imbalance shear force. The calculation of engineering example shows that the internal force adjustment after lateral load allocation is necessary. The two node parallel cantilever method is able to consider the impact of side piers height, also reflects the different characteristics of lateral load and bending moment distribution ratio. For the lock head withstands lateral asymmetric load, lateral imbalanced shear calculation and allocation is also necessary. The comparative analysis with finite element results shows that after lateral load allocation, unbalanced lateral shear force allocation, internal force adjustment, the result of bottom plate internal force is highly accurate.