|Table of Contents|

Anti-seismic performance of cast-in-place ECC and prefabricated mortise-tenon hybrid connection assembled RC bridge piers(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2023年05期
Page:
104-117
Research Field:
道路与铁道工程
Publishing date:
2023-11-10

Info

Title:
Anti-seismic performance of cast-in-place ECC and prefabricated mortise-tenon hybrid connection assembled RC bridge piers
Author(s):
LIN Shang-shun1;  LIN Yong-jie1;  XIA Zhang-hua2;  ZHAO Jin-bing3;  LI Ya-le4
(1. Fujian Provincial Key Laboratory of Advanced Technology and Information in Civil Engineering, Fujian University of Technology, Fuzhou 350118, Fujian, China; 2. School of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 3. Haoyao Times(Fujian)Group Co., Ltd., Fuzhou 350108, Fujian, China; 4. Department of Building Engineering, Jiangsu Open University, Nanjing 210036, Jiangsu, China)
Keywords:
bridge engineering;  assembled bridge pier;  quasi-static test;  mortise-tenon hybrid connection;  engineered cementitious composite;  anti-seismic performance
PACS:
U443.22
DOI:
10.19818/j.cnki.1671-1637.2023.05.006
Abstract:
In order to improve the anti-seismic performance of assembled reinforced concrete(RC)bridge piers, a new connection configuration using a hybrid connection of cast-in-place engineered cementitious composites(ECC)and prefabricated mortise-tenon was proposed. Quasi-static tests of three assembled RC pier specimens using hybrid connections(with the height of cast-in-place ECC segments and depth of the notch as the varying parameters, No. DZ-1, AC-200, and XJ-250)and one assembled RC pier specimen using a cast-in-place ECC wet connection(No. PT-1)were carried out. A test validated ABAQUS finite element model was established, and the effects of parameters such as the axial compression ratio, length-to-slender ratio, depth of notch, and height of cast-in-place ECC segments on the anti-seismic performance of assembled RC bridge piers were analyzed. Analysis results show that the damage modes of the four pier specimens are all compression bending damage, and the cast-in-place ECC segments of each specimen are not damaged. Compared with the PT-1 specimen, the peak loads of assembled RC bridge piers with cast-in-place ECC and prefabricated mortise-tenon hybrid connection increase by 25.74%-30.03%, the ultimate displacement increase by 22.75%-106.39%, and the residual displacement decrease by 43.70%-61.42%, which indicates better anti-seismic performance. The AC-200 specimen has the largest depth of notch, and its residual displacement is larger than that of the other assembled bridge piers, with poorer energy dissipation capacity. The peak load and yield load of assembled bridge piers increase with the axial compression ratio and the height of cast-in-place ECC segments and decrease with the increase in the length-to-slender ratio. The ductility factor increases with the height of the cast-in-place ECC segment and decreases with the increase in the length-to-slender ratio and axial compression ratio. It is recommended that the depth of the notch in hybrid connections should not exceed 75% of the side length of the tenon. 7 tabs, 21 figs, 30 refs.

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Last Update: 2023-11-10