Formula of critical edge load of strip foundation under complex stress state

ZHOU An-nan; LUO Ting; YAO Yang-ping

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Formula of critical edge load of strip foundation under complex stress state

更新时间：2026-06-25

- Formula of critical edge load of strip foundation under complex stress state
- Vol. 25, Issue 10期　刊出日, (2004)
- 作者机构：
  
  北京航空航天大学土木工程系,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU432
- Online First：25 July 2014，
  
  Published：2004
- 稿件说明：
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ZHOU An-nan, LUO Ting, YAO Yang-ping. Formula of critical edge load of strip foundation under complex stress state[J]. 2004, 25(10期　刊出日).
DOI：

ZHOU An-nan, LUO Ting, YAO Yang-ping. Formula of critical edge load of strip foundation under complex stress state[J]. 2004, 25(10期　刊出日). DOI：

摘要

莫尔-库仑强度准则的临塑荷载公式由于没有考虑中主应力在强度上的作用使计算结果偏于保守。利用具有线性形式的双剪应力强度准则替换原有的莫尔-库仑强度准则，将中主应力引入临塑荷载的计算中，推导出平面应变条件下考虑中主应力影响的临塑荷载公式，并通过算例说明了新临塑荷载公式的计算结果比原有公式有较大的偏高。

Abstract

The critical edge load

which is defined as the load strength on the ground when the plastic region just appears at the foot of a strip foundation

was proposed based on Mohr-Coulomb strength criterion. A formula of the critical edge load is modified based on the twin shear stress strength criterion

which is a three-dimensional strength criterion expressed in a linear form and is used widely in China now. Compared with the original formula

bigger value of the critical edge load can be calculated by using the modified formula for the effect of intermediate principal stress is considered in plane strain condition.

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