[1]朱粟郁.超高层建筑深基坑排桩支护结构抗震性能测试[J].华南地震,2019,39(04):136-141.[doi:10.13512/j.hndz.2019.04.020]
　ZHU Suyu.Seismic Performance Test of Deep Foundation Pit Pile Supporting Structure of Super High-rise Building[J].SOUTH CHINA JOURNAL OF SEISMOLOGY,2019,39(04):136-141.[doi:10.13512/j.hndz.2019.04.020]
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超高层建筑深基坑排桩支护结构抗震性能测试()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
39
期数:
2019年04期
页码:
136-141
栏目:
华南地震
出版日期:
2019-12-31

文章信息/Info

Title:
Seismic Performance Test of Deep Foundation Pit Pile Supporting Structure of Super High-rise Building
文章编号:
1001-8662（2019）0４-0136-06
作者:
朱粟郁
（华东建筑设计研究院有限公司，上海 200070）
Author(s):
ZHU Suyu
（East China Architectural Design & Research Institute Co. , Ltd，ShangHai 200070，China）
关键词:
超高层建筑; 深基坑排桩; 支护结构; 抗震性能; 压顶梁; 位移
Keywords:
Super high-rise building; Deep foundation pit pile row; Support structure; Seismic performance; Capping beam; Displacement
分类号:
TU473
DOI:
10.13512/j.hndz.2019.04.020
文献标志码:
A
摘要:
为研究地震作用下超高层建筑深基坑排桩支护结构的抗震能力，提出超高层建筑深基坑排桩支护结构抗震性能测试方法，针对南方地区某超高层建筑施工工地的深基坑工程，采用中国核动力研究设计院的大型地震模拟振动台测试深基坑排桩支护结构模型抗震能力，根据弹性地基梁基本原理计算基坑排桩支护结构常规梁单元刚度矩阵和弹性地基梁单元刚度矩阵，得到深基坑排桩支护结构总刚度矩阵，依据总刚度矩阵和排桩支护结构静力平衡条件初步得到排桩支护结构位移，采用压顶梁弹性系数修正总刚度矩阵，获取准确排桩支护结构位移，测试超高层建筑深基坑排桩支护结构抗震性能。实验测试结果表明，所提方法可准确测得支护结构横向位移-纵向深度以及排桩桩身位移，且测得超高层建筑基坑深度越深，地下连续墙侧向位移随地震等级增大幅度越大，超高层建筑深基坑排桩支护结构抗震性能越差。
Abstract:
To study the seismic capacity of pile-supporting structures in deep foundation pits of super high-rise buildings under earthquakes, this paper proposes a method for testing the seismic performance of deep foundation pit pile supporting structure of super high-rise building. For a deep foundation pit project at a construction site of a super high-rise building in the southern region, the large-scale earthquake simulation shaking table designed by China Nuclear Power Research and Design Institute is used to test the seismic resistance of the deep foundation pit pile support structure model. According to the basic principles of elastic foundation beams, the conventional beam element stiffness matrix and elastic foundation beam element stiffness matrix of the foundation pit support structure are calculated, and the total stiffness matrix of the deep foundation pit row support structure is obtained. According to the total stiffness matrix and the static equilibrium conditions of the pile supporting structure, the displacement of the pile supporting structure is initially obtained. The elasticity coefficient of the roof beam is adopted to modify the total stiffness matrix to obtain the accurate pile supporting structure displacement and test the seismic performance of pile supporting structures for deep foundation pits of super high-rise buildings. The experimental results show that the proposed method can accurately measure the lateral displacements and longitudinal depths of the supporting structure and the displacement of row pile body, and the deeper the foundation pit depth of the super high-rise building is measured, the greater the lateral displacement of the underground diaphragm wall is with the increase of earthquake grade, and the worse the seismic performance of the deep foundation pit row pile supporting structure of the super high-rise building is.

备注/Memo

备注/Memo:
收稿日期：2018-07-19
作者简介：朱粟郁（1991- ），男，本科，主要从事结构设计。
E-mail：yujF66@163.com.
更新日期/Last Update: 2020-02-27