砂土液化动稳态强度分析
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摘要
根据动三轴实验数据,砂土的应力路径最终达到一个稳定的阶段。此时,在不同的振动周期,砂土的孔隙水压幅值不再增加,应力路径相互重叠,但是应变幅值却以恒定的速率不断增加,这种相对稳定状态中的极限强度是评估砂土抗液化能力的重要指标,并结合饱和砂土的孔隙水压力发展和应力路径,使砂土液化强度更加明了。
According to the dynamic triaxial test of sand, there is a steady state at the last phase of the development of strain and stress path. In different cycle of this phase, the stress paths superpose with each other, but the axial strain tends to a steady rate. The strength of the sand in this phase is studied because it is an important parameter to evaluate the stability of sand soil liquefaction. Considering the strength developed with stress path, the mechanism of saturated sand liquefaction seems more clear.
According to the dynamic triaxial test of sand, there is a steady state at the last phase of the development of strain and stress path. In different cycle of this phase, the stress paths superpose with each other, but the axial strain tends to a steady rate. The strength of the sand in this phase is studied because it is an important parameter to evaluate the stability of sand soil liquefaction. Considering the strength developed with stress path, the mechanism of saturated sand liquefaction seems more clear.
引文
1 邵生俊,谢定义.饱和砂土的强度及破坏准则[J].岩土工程学报,1991,13(1) :24～33
2 张建明.三维应力条件下饱和砂土的动有效强度准则[J].水利学报,1989,(3) :54～59
3 聂守智.在动荷载作用下饱和砂土的液化及其强度[J].岩土工程学报,1980,2(3) :64～73
4 张克绪.饱和砂土的液化应力条件[J].地震工程与工程震动,1984,4(1) :100～108
5 汪闻韶.饱和砂土振动孔隙压力实验研究[J].水利学报,1962,(2) :31～34
6 俞茂宏.岩土类材料的统一强度理论及其应用[J].岩土工程学报,1994,16(2) :1～10
7 姚仰平,谢定义,俞茂宏.复杂应力下砂土的广义双剪应力破坏准则及双硬化本构模型[J].西安冶金建筑学院学报,1994,26(4) :392～397
2 张建明.三维应力条件下饱和砂土的动有效强度准则[J].水利学报,1989,(3) :54～59
3 聂守智.在动荷载作用下饱和砂土的液化及其强度[J].岩土工程学报,1980,2(3) :64～73
4 张克绪.饱和砂土的液化应力条件[J].地震工程与工程震动,1984,4(1) :100～108
5 汪闻韶.饱和砂土振动孔隙压力实验研究[J].水利学报,1962,(2) :31～34
6 俞茂宏.岩土类材料的统一强度理论及其应用[J].岩土工程学报,1994,16(2) :1～10
7 姚仰平,谢定义,俞茂宏.复杂应力下砂土的广义双剪应力破坏准则及双硬化本构模型[J].西安冶金建筑学院学报,1994,26(4) :392～397
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