Open AccessShear Behavior of Prefabricated Segmental Epoxied Joints Considering Defect Degree in Cemented Surfaces
Author(s) -
Hao Chen,
Kai Zhou
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/510/5/052064
Subject(s) - shear (geology) , materials science , shear stress , direct shear test , composite material , slip (aerodynamics) , structural engineering , shear wall , critical resolved shear stress , geotechnical engineering , geology , shear rate , engineering , rheology , aerospace engineering
In order to research the influence of the defect degree of cemented surface on the shear behaviour of prefabricated segmental epoxied joints, the paper considers the defect degree of cemented surfaces on the specimens of epoxied joints with single keys by direct shear test and records the ultimate shear loads and vertical relative slips, the failure modes of the specimens and the normalized shear stress-vertical relative slip curve are analysed, and the measured values of the ultimate shear loads are compared with the existing calculation formula. It can be concluded that the shear capacity, normalized shear stress and plastic deformation capacity of the specimens of epoxied joints with single keys without defect in the cemented surfaces have been improved which are compared with the specimens with 10% defects and the specimens with 20% defects. The BUYUKOZTURK O formula overestimates the shear capacity of the specimens with 10% defects, and underestimates the shear capacity of the specimens with no defects and10% defects; The formulas of Sun Xueshuai and Yuan Aimin underestimate the shear capacity of the specimens with no defects, 10% defects and 20% defects. It is not appropriate to ignore the effect of the defect degree in the cemented surface on the shear capacity of the epoxied joints.