Student Number 82322002 Author wen-yu kuo(³¢¤å§) Author's Email Address No Public. Statistics This thesis had been viewed 244 times. Download 0 times. Department Civil Engineering Year 1997 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Title Analysis of the response of group pile foundation pier under earthquake Date of Defense Page Count 0 Keyword
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Abstract There are many earthquake occurring in Taiwan.The effect of soil layer acting on structure should be considered in the dynamic response of bridge under earthquake.By the great advances of capacity of microcomputer,the analysis of soil-structure interaction(SSI) is accessible.When foundation was established on weak soil layer,the pile is required to transmit the loading to the rock base and the battered piles are used if larger lateral force was applied.
Therefore,the response of battered pile of pier suffering earthquake is necessary to be studied.
This paper adopts the three dimensional finite element to evaluate the response of group pile foundation of bridge pier consider SSI under earthquake by direct method in time domain.This paper used eight node linear element to simulate soil and beam element to simulate pile and pier.The Mohr-Coulomb failure criteria of elastoplastic material is applied to describe the stress strain behavior of soil.
Three cases are discussed in this paper.First,evaluate the response of bridge pier with different spacing which varying from one to six time of pile spacing.Second,discuss the differences of dynamic responses of bridge pier with same length of piles planted in different depths of soil layers.Third,compare the dynamic responses of bridge pier with different angles of battered piles.
From the results of analysis,corresponding to the increasing of pile spacing the maximum top and bottom displacements of pier and maximum acceleration decrease.The maximum bending moment and shear force in the bottom behave in the same manner.The maximum bending moment,maximum shear force,maximum acceleration,maximum displacement in the bottom of the pier decrease with the increasing angle of battered piles.In the contrast,the maximum displacement,maximum acceleration in the top of bridge pier decrease with the increasing angle of battered piles.
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