摘要
提出一个适合分析不规则荷载作用效果的孔压模型,该模型以等幅荷载液化试验及孔压模型为基础,基于残余孔压累积原理,利用微分法和叠加法分别构造并进行优选。利用等幅荷载液化试验、人工调制不规则荷载液化试验以及地震波输入动三轴液化试验对所提模型进行检验,结果显示:(1)模型可以较好模拟等幅荷载液化试验;(2)模型可以较好描述人工调制不规则荷载液化试验结果;(3)模型可以模拟不规则地震荷载作用下的孔压增长规律,且对不同地震波型导致的孔压增长规律也有较好复现;(4)模型参数少,能实现孔压实时分析,运用方便。
A pore pressure model suitable for analyzing irregular loading effects is proposed,which is based on liquefaction test with constant amplitude of load,pore pressure model,accumulated principle of residual pore pressure,using differential method and superposition method. Using liquefaction test with constant load, liquefaction test with artificial modulation irregular load and dynamic triaxial liquefaction test with input earthquake wave,the proposed model is verified,and the results are drawn as follows:(1) The model can better simulate the results of liquefaction test with constant load;(2) The model can better describe the results of liquefaction test with artificial modulation irregular load;(3) The model can describe pore-pressure growth law under earthquake wave,and also can better analyze differential pore-pressure under different types of earthquake waves;(4) The model has few parameters and can analyze pore-pressure in real time and easy to use.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第S1期3050-3055,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51378164)
黑龙江省科技攻关计划项目(GZ07C505)
关键词
土力学
不规则荷载
饱和砂土
孔压模型
soil mechanics
irregular load
saturated sands
pore pressure model
