地震荷载下饱和砂土孔压增长时程计算方法
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摘要
本文采用逐波累计方法,依据适于不同固结条件的孔压增量模型,计算每一应力循环的孔压变化,可给出非均等固结复杂情况下孔压实时增长过程。采用不同固结比两种砂进行若干典型地震荷载动三轴液化试验,试验结果与所提方法的计算结果有良好对应关系,表明本文方法可有效地描述地震荷载作用下非均等固结饱和砂土孔压增长过程。
Using the accumulative approach of cycle-by-cycle, the time-dependent rise of the pore pressure under the irregular loading can be obtained.By employing the incremental model suitable for soils in the different consolidation ratios,the pore water pressure increment can be evaluated for each cycle.The dynamic triaxial tests of two types of sands under anisotropic consolidation for several typical seismic incidences are conducted.The comparison between the tested and the calculated results indicates that the method proposed in the paper can describe the actual process of the pore pressure rise of anisotropically-consolidated saturated sands under earthquake loading effectively.
Using the accumulative approach of cycle-by-cycle, the time-dependent rise of the pore pressure under the irregular loading can be obtained.By employing the incremental model suitable for soils in the different consolidation ratios,the pore water pressure increment can be evaluated for each cycle.The dynamic triaxial tests of two types of sands under anisotropic consolidation for several typical seismic incidences are conducted.The comparison between the tested and the calculated results indicates that the method proposed in the paper can describe the actual process of the pore pressure rise of anisotropically-consolidated saturated sands under earthquake loading effectively.
引文
[1]孟上九,袁晓铭.建筑物不均匀震陷简化分析方法[J].地震工程与工程振动,2003,23(2):102~107.
[2]孙锐,袁晓铭,等.全自动地震波输入动三轴装置指标和功能测试[J].地震工程与工程振动,2002,22(3):100~105.
[2]孙锐,袁晓铭,等.全自动地震波输入动三轴装置指标和功能测试[J].地震工程与工程振动,2002,22(3):100~105.
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