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ISSN 2063-5346
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EFFECTS OF EARTHQUAKE ON PILE FOUNDATION

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Rushan Khan , Vishal Pawar , Anil Kumar Choudhary
» doi: 10.31838/ecb/2023.12.si5.092

Abstract

The Puqian Bridge is situated in an area that is highly vulnerable to earthquakes, and the region has been fortified with seismic measures that can withstand an intensity of up to 8 degrees, and its concept features the world's best-in-class height floor motion arrangement. "However, Regarding earthquake damage, the seismic performance of the pile foundation has not been fully researched, and the seismic problems associated with the pile foundation are particularly important. In order to learn about the pile foundation's dynamic properties, we performed a large-scale shaking desk test (STT).'' The pile-ground interaction method for a bridge changed into determined using an artificial mass version, and chose the height of ground acceleration variation between 0.15g-0.60g (g is gravitational acceleration) according to seismic depth. The results show that the acceleration increases as the height of the bridge pile increases from top to bottom and decreases when the seismic activity appears stable. As long as the magnitude of the earthquake exceeds 0.50 g, the factor that amplifies the acceleration at the pile’s peak will remain at 1.32. It was shown that the bedrock floor had a little effect on seismic wave amplification, but the overburden played a significant role in both wave amplification and filtering, the pile foundation was compromised at the depth where the seismic magnitude reached 0.50 g. As the earthquake depth exceeded zero.50 g, pile foundation's fundamental frequency gradually fall off and eventually stabilized at 0.87Hz. "Pile cap contact surface, soft and hard soil interface, bedrock surface all had a greater increase in bending second, where cracking occurred without difficulty." Pile foundations in meizoseismic zones need to be specifically aimed at particular locations.

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