|Table of Contents|

Influence of sleeve embedded location on seismic performance of precast assembled bridge pier structure (PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2022年5期
Page:
73-85
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Influence of sleeve embedded location on seismic performance of precast assembled bridge pier structure
Author(s):
GU Jian-feng;  XIANG Chun-yan;  HUANG Min-shui;  LU Hai-lin;  YANG Hong-yin
(School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, Hubei, China)
Keywords:
bridge engineering;  precast assembled bridge pier;  quasi-static test;  seismic performance;  numerical analysis;  cast-in-place pier
PACS:
U442.55
DOI:
10.19721/j.cnki.1671-8879.2022.05.008
Abstract:
To study the influence of sleeve embedded location on the seismic performance of precast bridge pier structure, quasi-static tests were carried out on two precast bridge piers with the sleeve embedded in the middle and top of the pier column, as well as a cast-in-place pier. The difference between the seismic performance of the precast bridge pier and the cast-in-place pier was compared and analyzed. Furthermore, the precast bridge pier structures with the joint at the bottom, middle and top of the pier column, and the sleeve embedded above and below each joint were simulated using the finite element method. The seismic performance of each structure was quantitatively analyzed by the hysteresis curve, skeleton curve, displacement ductility coefficient, energy dissipation capacity and stiffness degradation. The results show that the failure modes of the precast pier structures with the sleeve embedded in the middle of the pier column and the cover beam are similar to that of the cast-in-place pier structure, which shows the bending failure characteristics. The sleeves can mitigate the formation of inclined cracks and spallation of the protective layer in precast pier structures. The bearing capacity of precast pier structures with the joint located in the middle, bottom and top of the pier column decreases successively. The bearing capacity of the precast pier structure with the joint in the middle of the pier column is slightly higher than that of the cast-in-place pier. The bearing capacity of the precast pier structure with the sleeve embedded in the cover beam is similar to that of the cast-in-place pier, and the bearing capacity of the precast pier structure with the sleeve embedded in the top of the pier column is the worst. For the precast pier at the same joint position, the structural bearing capacity of the sleeve embedded on the joint is higher than that of the sleeve embedded under the joint. The ductility of the precast pier structures with sleeve embedded in the bearing platform and bottom of the pier column is the best, and the ductility coefficients are 7.7% and 5.5% higher than that of the cast-in-place pier, respectively. The ductility coefficient of the precast pier structure with sleeve embedded in the top of the pier column is equivalent to that of the cast-in-place pier, and the ductility performance of other specimens is lower than that of the cast-in-place pier. The seismic performance of the precast pier structures with the joint located in the middle, bottom and top the pier column decreases successively, and the seismic performance of precast pier structure with sleeve embedded in the middle of the pier column and above the joint is slightly better than that of the cast-in-place pier. The seismic performance of the precast pier structure embedded in the middle of the pier column and below the joint is equivalent to that of the cast-in-place pier, while the seismic performance of the precast pier structure embedded in the cover beam is the worst.5 tabs, 18 figs, 26 refs.

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Last Update: 2022-09-30