深圳某网络科技大厦副楼单边大悬挑结构设计

Design of a unilateral large cantilever structure of annex building of Network Technology Mansion in Shenzhen

深圳某网络科技大厦副楼为复杂超限单边大悬挑建筑,采用框架-核心筒混合结构体系,屋面高度为47m,单边悬挑长度达36.65m,桁架高度为15m。针对该重要、复杂、特殊的结构体系,分析了结构体系各部分的传力机制及特点,进行了基于性能的抗震设计、卸载模拟、悬挑部分的风振动与舒适度研究以及大悬挑结构竖向地震动研究和整体结构防连续倒塌分析。提出了解决桁架根部局部弯矩过大的新型节点,并对关键节点进行有限元分析。分析结果表明,结构设计满足要求,所采取的设计方法和新技术是合理可行的。

The annex building of Network Technology Mansion in Shenzhen is a complex out-of-code unilateral large cantilever structure with roof height of 47m, using frame-core wall structural system with unilateral cantilever length of 36. 65m and truss height of 15m. For the important, complex, unique structural system, the force transmission mechanisms and characteristics of every part of the structural system were analyzed. The performance-based seismic design, unloading simulation, wind vibration and comfort level study for the cantilever system as well as the vertical ground motion study and the progressive collapse analysis of the overall structure were carried out. A new node was put forward to solve the problem of local large bending moment in truss root, and the finite element analysis was carried out in key nodes. The analyses results show that structural design meets the code requirements and design methods and new technologies are feasible and reasonable.