深圳前海博物馆结构分析与设计

Structural analysis and design on Shenzhen Qianhai Museum

深圳前海博物馆建筑造型独特,采用钢管混凝土框架-核心筒结构体系,结合竖向交通对称布置了8个剪力墙核心筒作为抗侧力构件,环周边布置12根外斜的钢管混凝土柱作为竖向承重构件;顶部3层布置跨层钢管混凝土拱架,形成948m跨度的无柱大空间,拱架面外与核心筒通过钢梁连接,面内与楼层梁柱刚接,提高了结构稳定性;通过布置平行折梁实现层层三角形立面叠檐造型,折梁之间通过竖向桁架、斜面内交叉拉杆连接成整体,形成折板的受力机制,叠檐与楼层错开引起的局部内力由斜柱承担。经过抗震性能化设计、拱架稳定性分析、叠檐和斜柱受力、复杂节点等专项分析,论证了结构体系的合理性。

The architectural design of Shenzhen Qianhai Museum is unique,the concrete-filled steel tube frame core tube structure system was adopted.In combination with vertical traffic,8 shear wall core tubes are symmetrically arranged as lateral force resistant components,and 12 externally inclined concrete-filled steel tube columns are arranged around the ring as vertical load-bearing components.The top three floors are equipped with cross story concrete-filled steel tube arches,forming a 948m large-span of column free space.The outer surface of the arches is connected to the core tube through steel beams,while the inner surface is rigidly connected to the floor beams and columns,which improves structural stability.By arranging parallel folded beams to achieve a layered triangular facade shape,the folded beams are connected to form a whole through vertical trusses and cross tie rods in the inclined plane,forming a force mechanism for the folding plate.The local internal forces caused by the offset of stories and facades are supported by the inclined columns.The rationality of the structural system has been demonstrated through specialized analysis such as seismic performance design,arch stability analysis,stress on stacked eaves,inclined columns and complex nodes.