中关村金融中心超高层钢结构设计中的关键技术

Key Techniques for Design of the High-rise Steel Structure of Zhongguancun Financial Center Tower

中关村金融中心超高层钢结构建筑的平面、立面布置复杂。在设计中采用钢框架-支撑结构体系,合理设置钢-混凝土组合结构过渡层。在高层建筑结构设计中首次采用按冶金建筑标准生产的Q345GJ钢材。在避难层采用桁架将竖向支撑连为一体,有效地增大了结构的侧向刚度,减小侧向位移。采用4层高的折线形柱实现建筑立面的变化,相应设置楼层水平桁架以改善折线柱水平分力的传递。采用大位移滑动支座,解决连廊与主楼的变形差异问题。将桩基础改为天然地基基础,方便施工,有效地缩短了工期、降低了造价。

The plan and facade layout of the high-rise steel structure of Zhongguancun financial center tower is very complicated. The steel frame-bracing structural system is adopted and the steel-concrete composite transition floors are used reasonably. Q345GJ steel with excellent properties is used for the first time in the high-rise building. In refuge floors, adjacent bracing-frames are connected together for increasing the lateral stiffness of the structure and reducing inter-story rotation displacement. The every four level-kinky line outer columns are adopted for the satisfying the demand for architectural facade profile, manufacture and construction easily. Floor horizontal trusses arranged at outer column bending level for increasing the diaphragm stiffness of the floor slab. Large-displacement sliding bearings are used to solve the differential displacement between the bridge-way and the tower. Changed pile foundation scheme into raft foundation scheme saved the cost and minimized construction period significantly.