（1 同圆设计集团有限公司， 济南 250001； 2 济南市规划设计研究院， 济南 250001）

［摘要］对于高烈度区的高度超限结构，只对上部结构进行抗震性能设计，而对桩基仅进行小震设计难以保证整体结构安全度。宜将桩基的抗震性能设计纳入整体的性能设计体系，并使桩基的抗震性能目标与上部结构相适应。通过对8度区超高层剪力墙住宅的超限设计，对桩筏基础的桩基进行了性能设计，提出了与上部结构相匹配的桩基抗震性能目标，根据抗震性能目标对工程桩基进行了中大震下的抗震承载力分析验算，并根据分析结果对筏板边桩采取了加密布置、加大配筋的加强措施。此外对桩基抗震性能设计需要进一步研究内容进行了探讨。经验算，工程桩基满足设定的抗震安全度目标。

［关键词］中震； 大震； 抗震性能目标； 单桩承载力； 桩基承载力安全系数

中图分类号：TU473-1文献标识码：A文章编号：1002-848X(2019)10-0094-04

Analysis on the design of super high-rise shear wall structure pile foundation in high seismic region

Du Peng1, Bai Zongkun1, Jiang Shilin1, Wang Yuqiu2

(1 Tongyuan Design Group Co.，  Ltd., Jinan 250001, China; 2 Jinan Planning and Design Institute, Jinan 250001， China)

Abstract:For the height over-limit structure in high seismic  region, only the upper structure is designed by the performance-based seismic design, however, it is difficult to ensure the safety of the whole structure by only small earthquake design of the pile foundation. Therefore, the performance-based seismic design of pile foundation should be incorporated into the overall performance-based design system, and the performance objectives of seismic design for pile foundation should be adapted to the upper structure. The pile foundation performance-based design for the pile-raft foundation was carried out by the over-limit design of the super high-rise shear wall structures in the 8 degree area. The seismic performance objectives of pile foundation matching with the upper structure was proposed. Based on the seismic performance objectives, the seismic bearing capacity of pile foundation under moderate and major earthquakes was analyzed and checked. According to the analysis results, strengthening measures of encryption arrangement and increasing reinforcement was adopted for the raft side piles. In addition, the further research contents of pile foundation performance-based seismic design were discussed. Through checking calculation, pile foundation of the project meets the expected seismic safety target.

Keywords:moderate earthquake; major earthquake; performance-based seismic design goals; bearing capacity of pile; safety factor of pile bearing capacity