| Although no harmful damage to highway bridge shallow foundations such assettlement or inclination has been observed even in strong earthquakes in Japan, ourunderstanding of the actual behavior of shallow foundations during strong earthquakes isnot sufficient to explain what design criteria and kinematic parameters are important tocontrol the seismic performance of shallow foundations. Therefore, in this paper, numbersof parametric calculations are conducted to estimate the permanent displacement ofshallow foundations after earthquakes using a new macro element that has been developedby CAESAR, PWRI. We have figured out that the permanent displacement is likely to bea function of the static safety factor and the slenderness of pier-footing system. |
