地震荷载下饱和砂土孔压增长时程计算方法  

A method for calculating time-dependent pore water pressure rise of saturated sands under earthquake loading

作　　者：孙锐[1] 袁晓铭[1] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2006年第3期261-263,共3页Earthquake Engineering and Engineering Dynamics

基　　金：国家科技部社会公益研究专项项目(2005DIB2J12Z);国家自然科学基金项目(50508041);黑龙江省青年科学专项基金项目(QC05C21)

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.

关 键 词：随机地震荷载 孔压增长 时程 逐波累计 简化方法 

分 类 号：P315.98[天文地球—地震学]