Impact of Site-Specific Extreme Hydrological Cycle on Footing Performance
Publication: Geo-Extreme 2021
ABSTRACT
In this study, a new climate-adaptive design method is developed to investigate the impact of extreme climate events on the safety and serviceability performances of building footing through incorporating the site-specific hydrological loads such as precipitation, evapotranspiration, and water table depth to soil strength and stiffness parameters. The site-specific extreme hydrological cycle was determined based on historical climate records. The Richards equation was used to compute the temporal and spatial variations of the degree of saturation and matric suction considering the hydrological loads as the top and bottom boundary conditions. The proposed method was applied to a semiarid climate site in Austin, TX, as a sample application. The results show that the critical ultimate bearing capacity and settlement obtained from the proposed method are 28% higher and 35% lower, respectively, than those calculated using the conventional deterministic approaches assuming soil is fully saturated.
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Geo-Extreme 2021
Pages: 255 - 266
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© 2021 American Society of Civil Engineers.
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Published online: Nov 4, 2021
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