Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE
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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...
Span length-dependent load-carrying capacity of normal concrete - HPFRC beams
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 15 Số 2 - Trang 26-37 - 2021
The dependence of load-carrying capacity on span length of beams, which
contained a combination of normal strength concrete (NC) - High-performance
fiber-reinforced concrete (HPFRC), was investigated in this study. The used
HPFRC contained 1.0 vol.% long hooked blended with 0.5% short smooth fibers. Two
types of span length were designed as 300 mm and 450 mm while dimensions of beam
sections were ...
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 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
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
Blast testing of ultra-high performance concrete fortifications using local materials
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 16 Số 4 - Trang 73-86 - 2022
This paper presents experimental results on blast testing of fortifications made
from ultra high performance concrete (UHPC) and ordinary concrete (NC) by a
non-contact explosion test with the TNT explosive. UHPC and NC samples used in
the test were of the type of precast fortification of the real-scale and
structure. TNT explosive was used in the test with a mass of 600 g per
detonation. The expl...
#fortifications #ultra-high performance concrete #explosive load #damage area #strain
Simulation of several flying situations of paragliders
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 15 Số 1 - Trang 79-89 - 2021
Paragliding is an adventure and fascinating sport of flying paragliders.
Paragliders can be launched by running from a slope or by a winch force from
towing vehicles, using gravity forces as the motor for the motion of flying.
This motion is governed by the gravity forces as well as time-varying
aerodynamic ones which depend on the states of the motion of paraglider at each
instant of time. There ...
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...
Optimization of steel moment frames with panel-zone design using an adaptive differential evolution
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 14 Số 2 - Trang 65-75 - 2020
Optimization of steel moment frames has been widely studied in the literature
without considering shear deformation of panel-zones which is well-known to
decrease the load-carrying capacity and increase the drift of structures. In
this paper, a robust method for optimizing steel moment frames is developed in
which the panel-zone design is considered by using doubler plates. The objective
function ...
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