基于弹性理论的基底应力解析解分析  

The Analysis based on the Elasticity Theory for the Analytical Solution of Basal Stress

作　　者：凤跃森 简佳峰 李轲[1] 蔡锋[1] FENG Yue-Sen;JIAN Jia-Feng;LI Ke;CAI Feng(CCCC First Highway Consultants Co.Ltd.,Xi'an 710068,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安市710068

出　　处：《公路》2024年第2期64-67,共4页Highway

摘　　要：矩形截面扩大基础的基底最大应力与基底受力状态相关。目前我国规范对基岩上的矩形截面扩大基础承受双向偏心受压的基底应力计算是依靠查表结合公式进行求解,其过程对于批量计算来说不甚方便且易出错。针对上述情况,首先对我国规范基底应力计算进行简要介绍,然后基于弹性理论对矩形截面扩大基础的基底应力计算的解析解进行分析,得到各种受力状态下的解析解公式,并通过计算实例与规范计算结果进行对比。结果表明,研究所得到的解析解结果与规范计算结果高度吻合,可以在今后的工程设计中加以推广。The maximum basal stress of rectangular section enlarged base is associated with basal stress state.At present,the calculation of the base stress of the extended foundation with rectangular section on the bedrock under bidirectional eccentric compression as per Chinese specifications is based on the table lookup and the formula,which is inconvenient and error-prone for batch calculation.In view of the above situation,in the paper,the code for the calculation of basal stress in China is introduced briefly.Then,the analytical results of basal stress of enlarged rectangular section base is analyzed based on the elastic theory in order to obtain the formula for analytical solutions under various stress distribution.The calculation results are compared with those of standard calculation.The result shows that analytical results in this paper are in highly accordance with the standard calculation results in the code,which will be of great importance to promote engineering design in the future.

关 键 词：桥梁基础 矩形扩大基础 基底应力 解析解 

分 类 号：U443.11[建筑科学—桥梁与隧道工程]