| dc.description.abstract | The loss of structures, life and property usually cause by the fault slipping. In the past, there have been researches on single soil layers, composite soil layers, and the different foundation types by fault slip. Relevant regulations have been formulated. But the influence of building height during fault slipping has not been considered. This study focus on the behavior of building height whose is affected by fault in the composite soil layer. Through the results of this study, it is suggested that future experimental designs should be more comprehensively considered to protect people′s lives and property.
In this study, twelve centrifuge modeling tests are conducted to investigate the behavior of different building heights, contact pressures, foundation types of buildings, and lifeline deformation during fault slip with the dip angle of 60 degrees under 80 g centrifuge acceleration field. Silica sand and cemented sand are used to prepare the total thickness (H) of the 8 m soil stratum. The thickness ratio of the soil stratum between cemented sand and sandy layer is 7:3. The height of the higher building is 9.6 m and the contact pressure is 48 kPa. The heights of the lower buildings are 3.6 m with different contact pressure are 27 kPa and 48 kPa, respectively. There are two types of foundations for the buildings. One is shallow foundation; the other is pile foundation. An aluminum pipeline is embedded at the depth of 0.8 m to simulate the prototypal length of 58.56 m and diameter of 0.16 m lifeline.
The test results show that in the same contact stress condition, the height of the building will affect the behavior of the structure by fault slipping. The behavior of the soil layer will be affected by different contact stress and foundation type, but not affected by the height of the building. The shallow foundation building in the reverse fault test, the greater the contact stress, the smaller the influence area, the soft rock layer can reduce the influence area by 30%H at most, and the sand layer can reduce the influence area by 34%H at most. In the reverse fault test, the influence area of pile foundation types will be less than that of the shallow foundation type, the soft rock layer can reduce the influence area by 60%H at most, and the sand layer can reduce the influence area by 66%H at most. The underground pipeline in the normal fault test, the hanging wall section will be exposed to the surface. In the reverse fault test, the pipeline deforms as the surface changes.
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