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| STUDY OF PORE-PRESSURE MODEL OF SATURATED SANDS UNDER IRREGULAR LOAD |
| MENG Shangjiu1，LIU Tianhua2 |
(1. Harbin University of Science and Technology，Harbin，Heilongjiang 150080，China；
2. Heilongjiang Institute of Technology，Harbin，Heilongjiang 150050，China) |
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Abstract 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.
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Received: 13 August 2013
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2014, Vol. 33 
