| dc.description.abstract | Taiwan is located in the junction of the Eurasian plate with frequent earthquakes. Soil liquefaction often occurs along with earthquakes, which often causes loss of life and property in high-potential areas. In this study, a series of centrifuge model tests were carried out to analyze the seismic response of centrifuge models for different types of deep foundation buildings. The deep foundation structure includes one-story basement foundation, two-story basement foundation, raft foundation and diaphragm wall foundation. Various physical changes were measured during the test to explore the dynamic response of deep foundation buildings on liquefaction sites.
The test results show that the use of one- or two-story basement foundations with seven-story buildings in pure sandy soil layers and the groun15F-DWater level below the surface is unstable and will collapse seriously after an earthquake. When the groun15F-DWater level is lowered, the stability of the building can be improved and the settlement and rotation change of the building can be greatly suppressed. Most of the settlement and rotation changes of the building occurred during the earthquake. The larger the area of the base plate, the more obvious the buoyancy. As the excess pore water pressure dissipates, the soil layer will regain the effective stress and rearrange, so that the earth pressure gradually rises and becomes stable. The diaphragm wall foundation penetrating the non-liquefied layer was the effect of restraining the building settlement is the best, but due to the surrounding soil settlement, there is a negative friction force on the surface of the diaphragm wall, which causes the building to be subjected to additional pull-down force around the building, so that the contant pressure at the bottom of the diaphragm wall exceeds the design value. | en_US |