搭接转换结构在外滩源项目中的应用研究

Study on Spatial Lapping Transfer Structure in the Bund Twin Towers Project

结合某复杂超限结构实例,介绍了搭接柱在国内外多项重大和复杂工程中的应用。采用多种软件研究了该搭接柱转换结构的受力性能,进行了弹性至弹塑性各阶段的整体数值分析;结合模拟地震试验,阐述搭接转换结构的受力特点和破坏特征;同时基于ABAQUS软件,建立搭接节点的空间有限元模型,进行了荷载-位移曲线的数值模拟,理论计算数据进一步验证了试验破坏现象。分析结果表明,搭接柱可以有效地传递上部荷载至下部结构柱,转换构件在地震动作用下损伤较小,基本保持弹性,竖向构件在与楼板交接处混凝土损伤较为严重,应予以加强;在采取针对性措施的情况下,该种搭接柱转换结构可以应用于7度抗震设防的高层建筑。本文研究可以为进一步研究转换柱结构提供一定参考。

Through a practical complex high-rise building, the engineering application of lapping column in many important buildings is introduced. In this paper, the performance of lapping-column structures is studied using FEA software and the elasto-plasitic analysis is performed to assess the seismic behavior of structure. Combining with shaking table test, the loading-carrying capacity and the failure phenomena of structures are compared. By the 3D finite element analysis in ABAQUS, behavior under numerical analysis and experiments were in good agreement. This study shows that this lapping-column structure can effectively transfer the loads from top to bottom structure parts; under rare earthquake, structure members keep on elastic stage with slight plastic damage by appropriate measures. Comparably, the damage on the boundary of column and slab is highly observed, where members are suggested to be enhanced in design. With corresponding means, this type of lapping-column structure can be applied under seismic intensity 7. These results can be taken as reference for further study on lapping-column structure.