In this study, the long‐term differential foundation settlement and vertical shortening of super‐tall buildings are investigated considering the coupling effect. At first, a time‐dependent settlement model is proposed to predict the foundation settlement based on the construction sequence method, in which both soil compression and pile shortening are considered. The pile shortening including the elasticity, shrinkage, and creep contributes to the most settlement of a single pile. The distribution of foundation settlement of piled raft is pot shaped with a large value in the core while small values in the surroundings. A time‐dependent soil‐foundation‐structure system is then developed using a series of equivalent springs to represent the distributed foundation settlements, by which the vertical shortenings of shear wall and mega column are predicted considering the coupling effect and moisture distribution. The pot‐shaped distribution of foundation settlement of piled raft leads to the decrease of vertical shortening for shear wall while the increase of vertical shortening for mega column, especially in the low stories. Finally, some health monitoring records of the Shanghai Tower are applied to validate the proposed time‐dependent settlement model and soil‐foundation‐structure system. The predicted foundation settlements show reasonable agreement with the monitoring records. The predicted vertical shortenings with considering the differential foundation settlement agree better with measurements than those without considering the differential foundation settlement.

中文翻译：

---

桩筏差异地基沉降及其对超高层建筑长期竖向缩短的影响研究

在这项研究中，考虑了耦合效应，研究了超高层建筑的长期差异基础沉降和竖向缩短。首先，提出了一种基于时间顺序的沉降模型，该模型基于施工顺序法来预测地基沉降，其中考虑了土的压缩和桩的缩短。缩短桩包括弹性，收缩和蠕变，有助于最大程度地解决单个桩的沉降问题。桩筏基础沉降的分布呈盆形，其芯部较大，周围较小。然后，使用一系列等效弹簧来开发随时间变化的土壤基础结构系统，以表示分布式基础沉降，考虑耦合效应和水分分布，预测剪力墙和巨型柱的竖向缩短。桩筏基础沉降的罐状分布导致剪力墙的垂直缩短减少，而巨型柱的垂直缩短增加，特别是在低层。最后，利用上海中心大厦的一些健康监测记录来验证所提出的时间依赖性沉降模型和土壤-基础-结构系统。预测的基础沉降与监测记录显示出合理的一致性。与不考虑差异基础沉降的情况相比，考虑差异基础沉降的预测竖向缩短量与测量结果更好地吻合。