Investigation of the effect of energy piles on the seismic response of RC high-rise building with piled raft foundation

Energy piles are green foundations that utilize the ground as a heat source or reservoir to provide renewable energy for buildings. However, the thermal cycles induced by energy piles may affect their structural behavior and interaction with the soil under seismic loading. This paper presents the first comprehensive study of the seismic performance of a high-rise building (HRB) on energy piled raft foundation using numerical modeling and simulation. A three-dimensional finite element model of a 15- story building with energy piles is developed and subjected to four different earthquake scenarios. The results show that the energy piles can reduce the seismic demand of the building in the cooling cycle, but they also increase the soil- structure interaction and pile- soil- pile interaction effects in the heating cycle. This paper also provides some insights for improving the seismic performance of high-rise buildings (HRBs) on energy piled raft foundations by using tuned mass dampers (TMDs) which can contribute to reducing the seismic response of the HRB when the soil is heated in the exchange of heat between the piles and the soil in the hot season.