Simulation of responses of a Tender Net Foundation on silty ground subjected to consecutive earthquakes
Simulation of responses of a Tender Net Foundation on silty ground subjected to consecutive earthquakes
Liquefaction induced by earthquakes causes instability of buildings such as large settlements resulting in damage to the building structures. Usually, when an earthquake occurs, the saturated loose sandy ground is most susceptible to liquefaction. Even for the saturated silty ground with small SPT N-values, the possibility of liquefaction needs to be considered in the design process. Tender Net Foundation (TNF) is a kind of shallow foundation with a combination of grid- shaped soil improvement to depths of 2 to 3 meters, concrete slab, and concrete single footings. In this paper, the dynamic analysis of an actual TNF on the silty ground subjected to three consecutive earthquakes is conducted. Measurements of the settlements of the TNF were made after the second earthquake. The silty ground is modeled by the UBC3D-PLM model. Ground accelerations recorded about 10 km away from the site area are used as the input accelerations in dynamic analyses. The responses of the TNF as well as the ground during and after the earthquakes are analyzed. The numerical analyses simulated well the measured settlements.
H. Vo-Cong; K. Takeuchi; Y. Tomono; Tatsunori Matsumoto
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
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