Tạp chí Khoa học Công nghệ Xây dựng số 4/2014
Ngày tạo : 15/07/2015
Tạp chí Khoa học Công nghệ Xây dựng số 4/2014
Phổ phản ứng chuyển vị trong phân tích nhà cao tầng chịu động đất ở Việt Nam bằng phương pháp tĩnh phi tuyến, download
ThS. Nguyễn Hồng Hải, TS. Nguyễn Hồng Hà, ThS. Vũ Xuân Thương
Một phương pháp thiết kế kết cấu dàn hợp lý theo độ tin cậy cho trước với ràng buộc tiêu chí kinh tế, download
ThS.Nguyễn Trọng Hà
Ảnh hưởng của tham số đến độ tin cậy phần tử của khung bê tông cốt thép, download
ThS. Phạm Đức Cương
Nghiên cứu ảnh hưởng của lực dọc đến quá trình chảy dẻo và mặt chảy dẻo của thanh thép tiết diện chữ I, download
ThS. Hoàng Hiếu Nghĩa, PGS.TS. Vũ Quốc Anh
Ảnh hưởng của chế độ xử lý nhiệt đến các chỉ số hóa học của dầu trẩu dùng chế tạo sơn truyền thống, download
TS. Trần Minh Đức, CN. Hoàng Ngọc Hiệp, CN. Nguyễn Thị Vân Anh, TS. Đào Thị Nhung
Nghiên cứu chế tạo bê tông cường độ cao sử dụng cát mịn và phụ gia khoáng hỗn hợp từ xỉ lò cao hoạt hóa và tro trấu, download
ThS. Ngọ Văn Toản
Nghiên cứu ảnh hưởng của các thông số đến ứng xử của tường có cốt, download
ThS. Phan Trần Thanh Trúc, TS. Lê Bá Khánh
Thành lập phương trình BSHH V1.0 bình sai hỗn hợp lưới trắc địa mặt đất - GPS trong hệ tọa độ phẳng, download
KS. Nguyễn Văn Xuân
Tính toán tải trọng gió tác dụng lên hệ mặt dựng kính theo tiêu chuẩn Việt Nam, Hoa Kỳ và Châu Âu, download
ThS. Nguyễn Mạnh Cường, ThS. Đỗ Hoàng Lâm, ThS. Nguyễn Hồng Hải, TS.Đại úy Đặng Sỹ Lân
ABSTRACT
Displacement spectra for seismic non-linear static analysis of high-rise buildings in Vietnam
MEng. NGUYEN HONG HAI, Dr. NGUYEN HONG HA, MEng. VU XUAN THUONG
Displacement-based
seismic design of structures, employing nonlinear pushover analysis,
requires the appropriate and reliable determination or selection of
displacement spectra for long range of period. The displacement spectra
used for analysis directly affects the obtained outcomes. This paper
presents discussions of researchers in the literature related to the
response spectra used for displacement-based seismic design. An
illustrated example, which compares analysis results based on response
spectra according to TCVN 9386:2012 and ASCE 7-2010, is also given. It
is shown that the response spectrum in TCVN 9386:2012 is not suitable
for the purpose of estimating target displacement for high-rise
buildings. A response spectrum according to ASCE 7 is recommended.
A reasonable design method for truss structure with give reliability coefficients according economic criteria
MEng. NGUYEN TRONG HA
The
design of structures according to given reliability and economic
constraint is a matter of interest for designers, but it has not been
extensively studied. This report presents a rational design approach
according to reliability and based on economic criteria using a proposed
optimal algorithm. The subject of research is steel truss of section
L.
Effects of parameters to the reliability of elements of reinforced concrete frame structures
MEng. PHAM DUC CUONG
In fact,
the parameters that characterize material properties, geometric
dimensions, loads, acting on building structures and reinforced concrete
structures are random variables that depend on external factors
(environment, climate, technology, ...) and on subjective factors of
human’s knowledge and perception. In current standards of many
countries, the design of reinforced concrete structures only use the
average value of those parameters, and substitute their errors with
component coefficients. In this article, the author presents the effects
due to error of each parameter of material strength (Rbn, Rsn), dimensions of cross sections (b, h, As)
and loads effect (M, N) on the element reliability of reinforced
concrete frame structures. Some remarks are made at the end of the
article.
Research on the effect of axial force on plastic flow and plastic surface of I steel section
MEng. HOANG HIEU NGHIA, A/Prof.Dr. VU QUOC ANH
When researching the formation of plastic hinge of bar structure, the author just only dealed with rectangular cross sections subjected to M and N. However, it’s necessary to research abitrary sections. This paper presents a model and method to determine the plasticity characteristic of the abitrary section bar as well as draws the elastic limit line and the plastic curve of H shape steel section to determine the formation of plastic hinge of H shape steel section including effect of axial force. The author suggests the equation of plastic curve and compares it with other previous researches.
Influence of heat treatment regime on chemical indexes of Tung oil to manufacture traditional lacks
Dr. TRAN MINH DUC, Ba. HOANG NGOC HIEP, Ba. NGUYEN THI VAN ANH, Dr. DAO THI NHUNG
Thermal
treatment of Tung oil (Wood oil) is an important stage in technical
procedures of manufacturing traditional lacquer. The effect of
traditional technology needs to be evaluated by scientific methods.
First investigation showing the possibility of improving the quality of
tung oil and results of investigation are presented in this paper.
Research
on manufacturing high strength concrete by using fine sand and mineral
admixtures of granulated blast-furnace slag and rice hush ash
MEng. NGO VAN TOAN
The
article analysed the influence factors to the workability and strength
of concrete, from that selecting the suitable ratio between rice hush
ash and slag. This ratio will be used to manufacture the gradings of
fine sand concrete of high strength containing mineral additives.
Research on their characteristics to evaluate the possibility of
application in actual constructions is also presented.
The effect of parametric study on the behaviour of reinforced soil retaining walls
MEng. PHAN TRAN THANH TRUC, Dr. LE BA KHANH
If the
requirements for the backfill of retaining walls from design standards
are followed, the cost of construction will be higher in comparison with the utilisation of available of backfill material at construction site. By
using a finite element program - Plaxis 2D, the authors analysed the
effect of backfill material and strength of ground on the behavior of
retaining walls that are reinforced by geotextile materials. An
investigation on the behavior of reinforced retaining walls placed on
ground condition at Son Tra peninsula (Da Nang city) and the under
permanent load. Results from investigation enable the analyses and
prediction of the behaviour of reinforced retaining walls due to the
effect of cohesive backfill and stiffness of foundation.
Establish program BSHH V1.0 for adjustment of combined geodesy-GPS data in grid coordinates system
Eng. NGUYEN VAN XUAN
The
adjustment of control networks is a complex problem due to a large
amount of data processing. With the development of advanced GPS
technology, building a control network by combining data obtained from
common surveying measurement and GPS data collection brings a higher
accuracy and reduces time of established network, alternatively this
takes full advantage and surmount the disadvantage of each technology.
Therefore, it is an urgent issue that we have to build up efficient
method automatic processing, calculation and adjust combined data
include geodesy measurement and GPS data. From actual demand of
production for automatic processing and adjusting this kind of survey
network, the author uses Visual Basic to create an adjustment program
for combined geodesy-GPS data in grid coordinates system.
Calculation
of wind load effects on the curtain wall using glazing materials based
on Vietnamese standard, American standard and Europe standard (pp.60-70)
MEng. NGUYEN MANH CUONG, MEng. DO HOANG LAM, MEng. NGUYEN HONG HAI, Dr. Capt. DANG SY LAN
In
recent years, more and more buildings in Vietnam use glass as
transparent glazing material in the building envelope. However, the
climate in Vietnam poses a big challenge to this type of building
construction. Vietnam is frequently and heavily affected by storms and
strong seasonal winds. Therefore, wind load plays an important role in
selecting the design of glazed curtain walls. Yet Vietnam has not had
any standard or detailed guideline regarding to the design of curtain
wall. As a result, many construction consultants face difficulties in
designing, especially wind load calculations. This report presents wind
load calculation problem for curtain wall using glazing materials and
some of its related issues following Vietnamese standard, American
standard and Europe standard.
