Title:
Stress-Release Rate Model for Measuring Working Stress in Concrete
Author(s):
Zhao-Dong Xu, Yi Zhang, Jin-Bao Li, and Chang-Qing Miao
Publication:
Materials Journal
Volume:
121
Issue:
4
Appears on pages(s):
51-60
Keywords:
multi-step slotting method; numerical analysis; stress measurement; stress-release rate model; working stress
DOI:
10.14359/51740782
Date:
8/1/2024
Abstract:
Accurately measuring the working stress of concrete through
the stress-release method is a crucial foundation for assessing
the operational condition of building structures and formulating
maintenance and reinforcement strategies. The slotting method,
employed within the stress-release technique, not only addresses
the limitations associated with the core-drilling and hole-drilling
methods, but also offers a practical solution for engineering
detection. This paper presents a novel multi-step slotting method
employing a stress-release rate model as its foundation. The fundamental
equations governing space-related issues are introduced,
and a theoretical model of the stress-release rate is derived. By
employing a multi-step slotting process instead of the conventional
one-step slotting approach, the limitations of the traditional
drilling method are overcome. The stress-release rate model is
calibrated using numerical simulation outcomes, followed by both
numerical simulation and experimental verification. With a relative
error of 3.5% between theoretical and simulated values, and
9.4% with experimental values after excluding the initial slotting
data, it is evident that the stress-release rate model demonstrates
notable accuracy and applicability. This reaffirms the effectiveness
and convenience of the multi-step slotting method for measuring
concrete working stress.
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