|Table of Contents|

Test on shear performance of segmental precast epoxied joint(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年02期
Page:
77-85
Research Field:
建筑结构
Publishing date:

Info

Title:
Test on shear performance of segmental precast epoxied joint
Author(s):
GOU Wenzhong1;  CHEN Hao2;  CHENG Gao3; 4;  WANG Pengqi3
(1. Shaanxi Road & Bridge Group Co., Ltd, Xi'an 710075, Shaanxi, China; 2. China Railway First Survey and Design Institute Group Co., Ltd., Xi'an 710043, Shaanxi, China; 3. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 4. Xizang Tianlu Co, Ltd, Lasa 850000, Xizang, China)
Keywords:
segmental precast;  epoxied joint;  shear key;  direct shear test
PACS:
U441.5
DOI:
10.19815/j.jace.2021.09068
Abstract:
In order to study the shear performance of the precast epoxied joints of concrete segments, a full-scale direct shear test of the epoxied joint was carried out in consideration of the joint form, the thickness of the epoxy resin and the number of shear keys, and the failure modes of the specimens were analyzed. According to the shear bearing capacity and vertical relative slip, the normalized shear stress-vertical relative slip curve was studied, and the existing shear bearing capacity formulas were compared and analyzed. The results show that compared with flat epoxied joints and wet joints, the shear resistance, normalized shear stress and plastic deformation capacity of the single keyed epoxied joint specimens are improved. The greater the thickness of the epoxy resin of the single key, the higher the shear resistance of the single keyed joint, the greater the normalized shear stress, and the better its plastic deformation ability. The shear bearing capacity of the double keyed epoxied joint specimens is higher than that of the single keyed epoxied joint specimens, and its plastic deformation capacity is better than that of the single keyed epoxied joint specimen. It is not advisable to ignore the influence of the thickness of the epoxy resin on the shear performance of epoxied joint.

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Last Update: 2023-03-20