Optimizing the building core is a fundamental goal in tall building design The area dedicated to elevators, which are among the most area-consuming elements in the core, might be considerably reduced with recent technological advancements. This study investigates the trade-offs of core reduction resulting from the elevator footprint decrease in supertall buildings since the core usually serves as a significant member of the structural system. An analytical model with an outriggered frame system representative of supertall office buildings is generated, and then a second model is reproduced by reducing its core. Structurally modified reduced core models satisfying lateral drift limits are produced and evaluated in terms of architectural, economic, and environmental aspects. The results showed that a gain in the leasable area is possible but at the expense of higher cumulative embodied carbon and material consumption. These outcomes provide a comprehensive perspective for structural design considerations, particularly core optimization for tall buildings with outriggers.

优化建筑核心筒是高层建筑设计的基本目标随着最近的技术进步，专用于电梯的区域是核心筒中最占地面积的元素之一，可能会大大减少。本研究调查了超高层建筑电梯占地面积减少导致的核心筒减少的权衡，因为核心筒通常作为结构系统的重要成员。生成具有代表超高层办公楼的外伸框架系统的分析模型，然后通过减少其核心重现第二个模型。生产满足横向漂移限制的结构修改的简化核心模型，并在建筑、经济和环境方面进行评估。结果表明，可租赁面积的增加是可能的，但以更高的累积隐含碳和材料消耗为代价。这些结果为结构设计考虑提供了一个全面的视角，特别是带有支腿的高层建筑的核心优化。