平面应变条件下基于Lade-Duncan强度准则中主应力条件的土压力问题及适用性研究
DOI:
作者:
作者单位:

西安工业大学建筑工程学院

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Earth pressure problem and applicability under the plane strain condition based on the principal stress condition in Lade-Duncan strength criterion
Author:
Affiliation:

1.Xi’an Technological University;2.Civil and Architecture Engineering ,Xi’an Technological University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对实际工程中存在的大量挡土墙、基坑开挖等平面应变问题,考虑中主应力对强度的影响,将平面应变条件下Lade-Duncan强度准则的中主应力关系代入SMP、Lade-Duncan、AC-SMP 和广义 Mises强度准则中得到新的平面应变强度准则。据此建立了基于各强度准则的主、被动土压力计算公式,进而推广至粘性土,并将主、被动土压力理论计算值与实测值进行了对比分析。研究结果表明,Mohr-Coulomb强度准则因其未考虑中主应力的影响,致使计算结果相对实测情况偏于保守;SMP强度准则、Lade-Duncan强度准则考虑到中主应力对土压力大小的影响,计算结果相比Mohr-Coulomb强度准则更接近实测情况;AC-SMP强度准则、广义Mises强度准则在一定内摩擦角范围内可以描述挡土墙的土压力大小,但超出适用范围时,二者均不再适用于描述挡土墙的土压力大小;广义Mises强度准则在适用范围内的计算结果相比SMP强度准则、Lade-Duncan强度准则计算结果更接近实测数据。研究结果可为挡土结构上土压力的计算提供一定的理论指导。

    Abstract:

    In?actual?engineering,?the?retaining?walls?and?foundation?pit?excavation?could?be?regarded?as?plane?strain?problems?considering?the?influence?of?intermediate?principal?stress?on?the?strength.?The?intermediate?principal?stress?relationship?of?Lade-Duncan?strength?criterion?under?plane?strain?conditions?is?substituted?into?SMP?and?Lade?-Duncan,?AC-SMP?and?the?generalized?Mises?strength?criterion,?and?we?obtained?the?new?plane?strain?strength?criterions.?Based?on?these?new?strength?criterions,?active?and?passive?earth?pressure?calculation?formulas?were?established,?and?then?extended?to?cohesive?soil.?The?theoretical?and?measured?values?were?compared?and?analyzed.?The?results?show?that?the?effect?of?intermediate?principal?stress?on?earth?pressure?is?significant.?The?Mohr-Coulomb?strength?criterion?fail?to?consider?the?influence?of?intermediate?principal?stress,?calculation?results?are?more?conservative?than?the?actual?measurement.?Because?of?considering?the?influence?of?the?principal?stress,?the?results?of?SMP?strength?criterion?and?Lade-Duncan?strength?criterion?are?closer?to?the?actual?measurement?than?the?Mohr-Coulomb?strength?criterion.?The?AC-SMP?strength?criterion?and?the?generalized?Mises?strength?criterion?can?describe?the?earth?pressure?of?the?retaining?wall?within?a?certain?range?of?friction?angle,?but?when?it?exceeds?the?applicable?range,?both?are?no?longer?suitable.?The?calculation?results?of?the?generalized?Mises?strength?criterion,?in?the?applicable?range,?are?closer?to?actual?data?compared?with?the?results?from?the?SMP?strength?criterion?and?Lade-Duncan?strength?criterion.?These?results?can?provide?some?theoretical?guidance?for?the?earth?pressure?calculation?of?the?retaining?structure.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-06-19
  • 最后修改日期:2020-10-27
  • 录用日期:2020-11-23
  • 在线发布日期:
  • 出版日期: