The estimation of the behavior when the structure which has pile foundation on the soft ground was exposed to the dynamic effects of earthquakes is very important for seismic design. This paper showed the results of the behavior of pile foundation by the shaking table tests using large scale laminar box. On the other hand, the simplified method to estimate the behavior of the structure with the pile foundation during earthquake was considered by authors. This paper outlines the characteristics of soil-pile interaction displayed in the tests and evaluates the efficiency of the method as shown by the test results. In (he studies, four models were employed: embedded foundation, two piles and a one-story structure (MODEL A); embedded foundation and two piles (MODEL B); non-embedded foundation, two piles and a one-story structure (MODEL C); and non-embedded foundation and two piles (MODEL D). The test models were 1/4-scaled compared with the prototype. The input motion was RINKAI92H, and it was normalized to 100Gal and 200Gal. The load distribution tendencies in the piles and the embedded foundation from the structure which was main investigation of this paper was performed employing models A and B. From the response spectrum on the tests, the characteristic of the vibration of the models were confirmed. The load distribution was studied using the test and the analytical results. In consideration of the investigation of the load distribution on the tests and analyses, the analytical model was made, and the earthquake response analyses were performed using the present method. The applicability of the present method was confirmed from the results on the tests and frequency response analyses.
展开▼
