凹凸缝约束对横向分力在高桩码头排架中分配系数的影响

Influence of concave-convex joint constraint on distribution coefficient of lateral force in bent of high-pile wharf

高桩码头横向分力在相邻结构段传递中忽略凹凸缝约束会导致排架分配系数偏大。将码头结构沿水平向简化为弹性支座刚性连续梁,考虑转动刚度,推导出在凹凸缝约束和不考虑约束条件下,高桩码头排架横向分力分配系数计算公式。结合工程实例,对比规范值、不考虑凹凸缝约束、考虑凹凸缝约束的公式计算值和三维有限元法计算值。结果表明,不考虑凹凸缝约束,公式计算和有限元计算结果吻合较好,比规范值偏小;考虑凹凸缝约束,排架的横向分力分配系数整体减小,尤其是在码头整体结构中部(凹凸缝附近)与规范值差异较大。

Ignoring the concave-convex joint constraint in the transfer of the adjacent structural sections of the high-piled wharf’s lateral force can lead to a large bent distribution coefficient. We simplify the wharf structure as a rigid continuous beam with elastic support horizontally, consider the rotational stiffness, and derive the calculation formula for the distribution coefficient of the lateral force component of the high-piled wharf bent under the constraint of the concave-convex joint and without considering the constraint. Combining with the engineering example, we compare the results of the normative value, and the formula calculation value without considering the concave-convex joint constraint, and the formula calculation value and the three-dimensional finite element method calculation value considering the concave-convex joint constraint. The results show that the results of the formula calculation are in good agreement with the results of the finite element calculation without considering the concave-convex joint constraint, and the results of the formula calculation and the finite element calculation are smaller than the standard value. Considering the concave-convex joint restraint, the lateral force distribution coefficient of the bent frame reduces as a whole, especially in the middle part of the overall wharf structure(near the concave-convex joint)is quite different from the standard value.