考虑斜桩的群桩基础设计与分析程序开发  

The Program for Design and Analysis of Pile Group with Raking Piles

作　　者：王凯 朱国甫[2] 翟鹏程[2] Wang Kai;Zhu Guofu;Zhai Pengcheng(Guangdong Provincial Academy of Building Research Group Co.,Ltd Guangzhou 510500,China;Wuhan University of Technology Wuhan 430070,China)

机构地区：[1]广东省建筑科学研究院集团股份有限公司,广州510500 [2]武汉理工大学,武汉430070

出　　处：《广东土木与建筑》2020年第7期41-45,共5页Guangdong Architecture Civil Engineering

摘　　要：桩基础是一种重要的基础形式,在受到水平荷载作用时,经常会设计部分斜桩提高其水平承载力,然而考虑斜桩的群桩基础尚无明确的计算方法。基于桩和承台共同作用的基于线性弹性模型的梁柱原理为基本分析理论,由结构物的刚度矩阵求解得到承台的空间位移和每根基桩分配的荷载,并求解每根桩的内力和位移,对桩基础进行计算与分析。基于以上计算方法与面向对象的编程技术开发了考虑斜桩的群桩基础的分析与设计程序,建立由直桩或斜桩和各种地层组成的群桩的三维桩土模型,计算承台与基桩的空间受力与位移,并能通过改变桩的直径与布置等调整桩的刚度,从而改变桩的受力与变形,优化设计,具有很好的工程实用价值。The design of piled foundation is normally based on rigid cap assumption.However,few commercial programs are available for the foundation design,especially if raking piles are included.Based on the elastic theory of beam on elastic foundation,the interactions between piles and adjacent ground are analyzed using finite difference method to obtain the individual pile lateral and vertical spring constants.The detail analyses are coded with the Visual C++programming language,the program can be used in the analyses of a pile group in a layered soil with both vertical and raking piles.The user can easily adjust the pile foundation stiffness by changing the pile dimensions,layouts so that optimum pile arrangement could be obtained.The program could become a valuable tool for the designers of pile foundation and provide a cost effective foundation to the structures.

关 键 词：群桩基础 斜桩 变刚度 线性弹性模型 有限差分法 程序开发 

分 类 号：TU473[建筑科学—结构工程]