Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE
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Structural damage detection using hybrid deep learning algorithm
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 14 Số 2 - Trang 53-64 - 2020
Timely monitoring the large-scale civil structure is a tedious task demanding
expert experience and significant economic resources. Towards a smart monitoring
system, this study proposes a hybrid deep learning algorithm aiming for
structural damage detection tasks, which not only reduces required resources,
including computational complexity, data storage but also has the capability to
deal with d...
Effect of fiber content on flexural fracture parameters of high-performance steel fiber-reinforced concrete
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 18 Số 1 - Trang 12-23 - 2024
This study deals with the effect of fiber content on fracture parameters of
high-performance steel-fiber-reinforced concretes through a bending test
program. All the high-performance steel-fiber-reinforced concretes flexural
specimens were tested under configuration of three-point loading. The fracture
parameters were hardening energy, softening energy and length of cohesive crack.
Two steel fiber...
#fracture energy #deflection-softening #deflection-hardening #cohesive crack #fiber content
Flexural and fracture behavior of high-performance concrete using notch specimen
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 18 Số 3 - Trang 102–113 - 2024
This study investigated the mechanical properties of high-performance concrete
using notched specimens. Allflexural specimens had an identical geometry of
40×40×160 mm3 with a span length of 120 mm. Four notchto-depth ratios were as
follows: 0 (N0 series), 0.125 (N1 series), 0.250 (N2 series), and 0.375 (N3
series), whichwere designed at the specimen bottom of midspan section. The
investigation fo...
#high-performance concrete #notched specimen #load-carrying capacity #notch-to-depth ratio #critical stress intensity factor
A fast fuzzy finite element approach for laterally loaded pile in layered soils
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 12 Số 3 - Trang 1-9 - 2018
A fuzzy finite element approach for static analysis of laterally loaded pile in
multi-layer soil with uncertain properties is presented. The finite element (FE)
formulation is established using a beam-on-two-parameter foundation model. Based
on the developed FE model, uncertainty propagation of the soil parameters to the
pile response is evaluated by mean of the α-cut strategy combined with a
res...
Effect of spatial variability of creep rock on the stability of a deep double-lined drift
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 16 Số 3 - Trang 46-58 - 2022
This work aims at investigating the effect of aleatoric uncertainty of creep
rock properties on the stability of an underground structure. This uncertainty
relates to the spatial variability of the mechanical parameters representing the
time-dependent behavior of geological rock formation due to the change in its
mineralogy. The chosen methodology consists of representing the aleatoric
uncertainty...
#spatial variability #aleatoric uncertainty #random field #EOLE #deep drift #viscoplastic behavior #Kriging-based reliability analysis
Daily personal exposure to black carbon in different microenvironments in Hanoi, Vietnam
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 16 Số 1 - Trang 80-88 - 2022
Daily personal exposure to black carbon (BC) in different microenvironments in
Hanoi, Vietnam was quantified for the first time. In this study, a portable
instrument, microAethe® model AE51, was used to continuously measure BC
concentrations in various microenvironments within buildings and transportation
modes. Overall average daily personal exposure to BC from those
microenvironments was 5.46 µg...
#black carbon #microenvironment #buildings #transportation #personal exposure
Phân tích dao động tự do của dầm FGM Timoshenko bằng phương pháp độ cứng động lực
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 10 Số 5 - Trang 19-28 - 2016
In this paper, free vibration of a functionally graded material (FGM) beam is
investigated based on the Timoshenko beam theory and dynamic stiffness method.
Material properties vary continuously throughout the thickness direction
according to the volume fraction constituent defined by power law function.
First, a consistent theory of vibration is established for FGM Timoshenko beam
taking into acco...
Vietnam general contractors’ perceptions on challenges to the delivery of green building projects
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 16 Số 4 - Trang 116-128 - 2022
This study focuses mainly on investigating differences in Southern and Northern
general contractors’ perception of challenges in executing green building
projects. The questionnaire survey-based data analysis results show that there
is a good consensus between general contractors (GCs) from these two regions on
the top two most critical challenges in delivering green building projects. They
are “l...
#green building project #general contractor #challenges #Southern #Northern #Vietnam
Mix design of high-volume fly ash ultra high performance concrete
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 15 Số 4 - Trang 197-208 - 2021
The addition of supplementary cementitious materials (SCMs) to replace cement,
especially with a high volume (> 50%), is an effective way to reduce the
environmental impact due to the CO2 emissions generated in the production of
ultra-high performance concrete (UHPC). Unfortunately, no official guidelines of
UHPC using a high volume of SCMs have been published up to now. This paper
proposes a new ...
#high volume fly ash #ultra-high performance concrete #mix design #packing density #curing condition
Effect of fly ash on shrinkage of self-compacting concrete using restrained ring test
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 13 Số 3 - Trang 26-33 - 2019
In recent years, fly ash (FA) has been increasingly used widespread like a
mineral admixture for the production of concrete in general and self-compacting
concrete (SCC) in particular. Fly ash is an industrial by-product and is
generated during the combustion of coal for energy production from the thermal
power station. Fly ash is utilized to increase the workability of concrete
mixtures and incre...
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