雪莲大厦高层混合结构设计

北京雪莲大厦为地上部分36层,建筑总高度146.30m的高层建筑,结构具有以下特点:结构高度高,地震反应大,平面轮廓不规则,在纵横两个方向的框架不正交,不能形成有效的抗侧力体系。为解决这些问题,设计中采取了以下措施:采用由矩形钢管混凝土框架-钢筋混凝土核心筒组成的混合结构体系,并设了两个加强层,有效地加强了结构的刚度,采用矩形钢管混凝土框架则解决了框架不正交所带来的梁柱连接问题。介绍了该工程结构体系的选择,加强层的设计及型钢梁柱节点的处理等,工程实践表明:在高烈度区,带加强层的混合结构体系能够满足结构各项设计要求;矩形钢管混凝土柱可大大减少柱断面,也便于非正交框架体系中梁柱的连接。

Structural design of Xuelian Building

Xuelian building is a high-rise structure,and is built in high seismic intensity region.It has 36 floors above the ground,and is 146.30m totally high.It′s irregular plan and non-orthogonal frame result in weak lateral stiffness.To solve these structural difficulties,the following measures are adopted.The structure is designed as a mixed structure which is composed of concrete-filled rectangular steel tube frames and reinforced concrete tubes.Two strengthening stories are designed with outriggers and belt members.This paper introduces the determination of the structural system,the design of stories with outriggers and belt members,and the design of the joints connecting reinforced concrete beams and columns.The mixed structure with stories strengthened by outriggers and belt members can meet all the requirements of design in high seismic intensity regions.The use of concrete-filled rectangular steel tube column reduces the size of the columns,and it is a convenient way to connect beams and columns in non-orthogonal frame systems.