Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE

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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
Thanh Xuan Nguyen, Phuong Thi-Thu Phan, Tien Van Pham
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 ...... hiện toàn bộ
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
Pham Hoang Anh
 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 ...... hiện toàn bộ
TỐI ƯU TRỌNG LƯỢNG DẦM FGM BẰNG THUẬT GIẢI TIẾN HÓA VI PHÂN CẢI TIẾN
Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE - Tập 13 Số 2 - Trang 48-63 - 2019
Pham Hoang Anh, Tran Thuy Duong
Bài báo giới thiệu một cách tiếp cận số cho bài toán tối ưu trọng lượng dầm FGM với ràng buộc về tần số dao động riêng. Phương pháp phần tử hữu hạn dựa trên lý thuyết biến dạng trượt bậc nhất được áp dụng để phân tích dao động riêng của dầm. Luật phân bố bốn tham số và năm tham số được sử dụng để mô tả phân bố thể tích của các vật liệu thành phần trong dầm theo phương chiều cao dầm. Mục tiêu là tố...... hiện toàn bộ
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
Tran Van Lien, Nguyen Tien Khiem, Ngo Trong Duc
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...... hiện toàn bộ
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
Dang Viet Hung, Ha Manh Hung, Pham Hoang Anh, Nguyen Truong Thang
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...... hiện toàn bộ
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
Tran Ngoc Tuyen, Duc-Phi Do, Dashnor Hoxha, Minh-Ngoc Vu, Gilles Armand
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...... hiện toàn bộ
#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
Thi-Ngoc-Han Vuong, Duy-Liem Nguyen, H.T. Tai Nguyen, Tri N. M Nguyen
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...... hiện toàn bộ
#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
Pham Manh Hao, Nguyen Cong Thang, Nguyen Van Thao, Nguyen Van Tuan, Luong Nhu Hai, Ngo Ngoc Thuy, Nguyen Xuan Man
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...... hiện toàn bộ
#fortifications #ultra-high performance concrete #explosive load #damage area #strain
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
Kha-Ky Lam, Duy-Liem Nguyen, Tuan Manh Le, Ngoc-Thanh Tran
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...... hiện toàn bộ
#high-performance concrete #notched specimen #load-carrying capacity #notch-to-depth ratio #critical stress intensity factor
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
Viet-Hung Truong, Ha Manh Hung, Pham Hoang Anh, Tran Duc Hoc
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 ...... hiện toàn bộ
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