石家庄华润中心大底盘多塔超高层结构体系抗震性能研究
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（1 北京市建筑设计研究院有限公司， 北京 100045； 2 华润置地（北京）有限公司， 北京 100035）
［摘要］石家庄华润中心为大型城市综合体项目，总建筑面积为56万m2，大底盘裙楼上设置4个超高层塔楼，结构整体未设置永久缝，为大底盘多塔整体式结构。采用反应谱法和弹性时程法两种方法，分析研究了水平地震作用下不同裙房刚度对塔楼地震剪力的影响情况。分析结果表明，塔楼弱轴方向地震剪力放大情况较强轴方向更明显，偏置明显的塔楼的地震剪力放大情况较偏置小的塔楼更明显；对于大底盘多塔结构，仅按照独立塔楼模型计算时结果不安全，会严重低估塔楼地震剪力，相关研究结果可供类似工程参考。［关键词］超高层结构; 大底盘多塔结构; 抗震性能; 塔楼偏置中图分类号：TU973.3+1 文献标识码：A 文章编号：1002-848X(2015)18-0030-05
Study on seismic performance of Shijiazhuang Huarun Center structural system with big chassis podium and multiple towersYang Yong1, Zhang Guoyan2, Chen Dong1, Ma Kai1, Wang Hao1, Zhang Nabin1, Kang Zhao1(1 Beijng Institute of Architectural Design, Beijing 100045, China; 2 China Resources (Holdings) Co., Ltd.\|Beijing, Beijing 100035, China)Abstract: Shijiazhuang Huarun Center is a large urban complex engineering with total construction area of 560.000m2. There are four super high-rise towers which are asymmetrically arranged on big chassis podium. No permanent joints are set in structure, so the structure is an integral structure with big chassis podium and multiple towers. Through two methods including response spectrum method and elastic time history method, the effects of different podium stiffness on the seismic shear force of tower under horizontal earthquake were analyzed. The result shows that the seismic shear force amplification of the weak axis direction of the tower is more obvious than the strong axis direction of the tower, and seismic shear force amplification of large bias tower is more obvious than the small bias tower. Besides, the seismic shear force of the tower can be severely underestimated when the results only depend on tower model for structure with big chassis podium and multiple towers. The results of the relevant research can be referenced for similar engineering.Keywords: super high-rise structure; structure with big chassis podium and multiple towers; seismic behavior; tower bias
作者简介：杨勇，硕士，高级工程师，一级注册结构工程师，Email：biadms_structure@126.com。
