高层建筑下扩展基础设计探讨

Study on Spread Foundation Design of the High-rise Building

对置于坚硬地基上的高层建筑柱或剪力墙下扩展基础进行有限元分析,结果表明,跨高比直接影响基底反力分布和基础受力形式。对比规范公式和有限元分析结果,提出高层建筑柱或剪力墙下扩展基础设计的改进方法。提出基础沉降计算的建议。介绍了采用有限元分析和改进方法对某33层剪力墙结构基础的优化设计。

By using the finite element method,the spread foundation under the column or the shear wall of high-rise building on a hard soil base has been analyzed.The results indicate that the span-to-depth ratio has a direct bearing on the distribution of reaction force on the bottom surface and bearing characteristics of the foundation.As compared with the formulas in national or regional codes and the results of the finite element analysis,improved measures of design of the spread foundation under the column or the shear wall of high-rise building are presented.The suggestions of calculating foundation settlement are presented.The optimize designs using finite element analysis and improved measures of the foundation of a 33-layers shear wall structure is introduced.