在二维应力状态下土体地震动偏应力的特征

Character of cyclic shearing stress induced by earthquake in earth in the case of two dimensional plane stress condition

地震作用在土体中产生的动偏应力包括动水平剪应力τｖｈ 和动正应力差［σｐ － σｈ］ ／２ 。

The cyclic shearing stress induced by earthquake in earth includes cyclic normal stress difference, [σ v σ h] /2, and horizontal tangential cyclic shearing stress, \%τ vh \% In the case of two dimensional plane stress condition, these two components of cyclic shearing stress ordinarily take an elliptical tracking parameter with the time factor during earthquake, but some of tracking parameters are a unique straight line In this paper, the relationship between \%[σ v σ h]\%/2 and τ vh is presented