Shaking table test on indirect-direct integrated health monitoring of pile foundations

Abstract

A series of shaking table tests on indirect-direct integrated health monitoring of pile foundations have been carried out for the purpose of detecting global and local damage during their service life. Different damage conditions of pile foundations are simulated. A limited number of acceleration sensors are placed on the roof and base of superstructure, whereas a number of strain sensors are attached to all piles at different depths. In the indirect health monitoring, the changes in transfer functions related to soil-structure interaction due to damage are investigated to detect global damage of piles. In the direct health monitoring, on the other hand, the changes in strain distribution of each pile due to damage are investigated to detect local damage of piles. Based on the experimental results, the feasibility of the real world application of the proposed method is discussed.