（1 西安建筑科技大学土木工程学院， 西安 710055；2 西安建筑科技大学建筑设计研究院， 西安 710055）

［摘要］结合西安市盛龙广场大底盘多塔结构工程实例，分析了大底盘多塔结构的结构特性和水平地震作用下结构的整体变形和受力特征。若将设备层作为单独的结构层，则会导致整体结构侧向刚度较难满足规范要求，对结构整体受力产生不利影响。提出设备层竖向抗侧刚度突变的处理方法及设计要点，为此类工程设计提供一定借鉴。

［关键词］大底盘多塔结构; 设备层; 侧向刚度比; 结构设计

中图分类号：TU318.2      文献标识码：A      文章编号：1002-848X(2014)06-0093-04

Treatment method of lateral stiffness mutation of large-chassis multi-tower structurewith the mechanical floor

Li Xiaolong1, Sun Xiaoling1,2, Li Xiaowen1, Xue Qiang2, Liu Xiaofan2, Zheng Yue2

（1 College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2 Design Institute of Xi’an University of Architecture and Technology, Xi’an 710055, China）

Abstract: Based on the practical large-chassis multi-tower structure on Shenglong square in Xi’an, the structure characteristics were analyzed as well as the overall deformation and mechanical characteristics under the horizontal earthquakes. If regarding the mechanical floor as a single structural floor, the overall lateral stiffness of the mechanical floor can not meet the requirements of design code, which does harm to the overall mechanical characteristics of the structure. The treatment method of vertical lateral stiffness mutation of the mechanical floor is presented, providing reference for the design of similar projects.

Keywords: large-chassis multi-tower structure; mechanical floor; lateral stiffness ratio; structural design

作者简介：李小龙，硕士研究生，Email：357757658@qq.com。

参考文献

［1］JGJ 3—2010 高层建筑混凝土结构技术规程［S］. 北京:中国建筑工业出版社, 2011.

［2］GB 50011—2010 建筑抗震设计规范［S］. 北京:中国建筑工业出版社, 2010.

［3］薛彦涛, 魏琏. 底部整体裙房上部多塔结构地震反应分析［J］. 建筑结构学报, 1989,10(6):21-29.

［4］张昊. 考虑扭转耦联的大底盘非对称多塔楼建筑振动分析的振型数选取［J］.建筑结构,2003,33(5):31-34.

［5］娄宇, 程辉, 施昌. 大底盘上对称多塔楼高层建筑的振动分析［J］. 建筑结构, 2001, 31(4):13-15.