Ngày tạo : 15/07/2015Tạp chí KHCN Xây dựng số 4/2010
PGS. TS. Cao Duy Tiến, TS. Nguyễn Cao Dương,
ThS. Hoàng Anh Giang
Giới thiệu quy chuẩn quốc gia về an toàn cháy cho nhà và công trình,
TS. Nguyễn Đại Minh
Phương pháp phổ phản ứng nhiều dạng dao động và tính toán nhà cao tầng chịu động đất theo TCXDVN 375:2006, download
TS. Lê Minh Long
Tính toán cấu kiện chịu xoắn theo ACI 318M-08,
KS. Lê Xuân Tùng
Thiết kế gối đỡ cách chấn dạng gối đỡ đàn hồi chịu động đất với mô hình phi tuyến của vật liệu chế tạo,
PGS. TS. Lê Ninh
Quan niệm mới trong thiết kế công trình chịu động đất và tiêu chuẩn TCXDVN 375:2006,
PGS. TSKH. Trần Mạnh Liểu, PGS. TS. Phan Trọng Trịnh, KS. Trịnh Việt Bắc, TS. Trần Đình Ngọc
Đánh giá khả năng hoạt động của đứt gãy kiến tạo tại khu vực nhà máy nhiệt điện Vũng áng – Hà Tĩnh,
KS. Tạ Xuân Hòa, KS. Nguyễn Tuấn Anh
Phương pháp thanh tra kiểm soát hiệu quả năng lượng cho hệ thống điều hòa không khí và thông gió,
TS. Hoàng Minh Đức
Đánh giá cường độ chịu nén hiện trường của bê tông theo tiêu chuẩn EN 13791:2007,
KS. Đoàn Văn Chinh, KS. Ngô Xuân Thế, ThS. Bùi Thị Kiên Trinh
Bàn về vấn đề thời gian thu tín hiệu GPS trong xây dựng mạng lưới khống chế trắc địa cạnh ngắn,
PGS. TS. Trần Chủng
Bàn về việc kiểm soát chất lượng kết cấu bao che nhà cao tầng,
Introduction to Vietnam Building Code on Fire safety of Buildings (pp. 3-8)
A/Prof. Dr. Cao Duy Tien, Dr. Nguyen Cao Duong, MEng. Hoang Anh Giang
Vietnam Building Code on Fire safety of Buildings has been issued in July 28, 2010 by the Circular No. 07/2010/TT-BXD of Ministry of Construction. The Code has come into effect on September 17, 2010. Regulation by the Institute of Construction Science and Technology - Ministry of Construction to coordinate with fire departments - the Ministry of Public Security Editor. By this text, the editors of the codes would like provide deeper explanation on the basic of development of this code to help readers in understanding and applying the Code. Recommendation on the application of the code is involved as well.
Modal response spectrum method and seismic analysis of high-rise buildings under TCXDVN 375:2006 (pp. 9-19)
Dr. Nguyen Dai Minh
In TCXDVN 375:2006, the modal response spectrum method is not explained in detail. Hence, this paper presents the background and seismic analysis of high-rise buildings based on this method. The paper may help readers to obtain key contents and basics of the modal response spectrum method. On the other hand, due to the convenience and easy control when applying the lateral force method in earthquake resistant analysis, in daily practice this method is usually used in design of high-rise buildings. Results obtained from already done analyses have shown that for buildings having more than 20 stories, the base shear force calculated from the lateral force method may be greater than that determined from the modal response spectrum method. This paper has also presented the comparison of the calculations obtained from the lateral force and modal response spectrum methods. Then, the improvement to the lateral force method is recommended in seismic analysis of high-rise buildings in case of not using (unwanted) the modal response spectrum method to save the times and the labor forces of the structural engineers as well as easily checking/controlling the output results of analysis.
Keywords: Earthquakes, high-rise buildings, the lateral force method of analysis (static equivalent method), the improvement of the lateral force method, the modal response spectrum method, TCXDVN 375:2006.
Torsion design of structural concrete members based on ACI 318M-08 (pp.20-29)
Dr. Le Minh Long
Torsional moment develops in structural concrete members as a result of asymmetrical loading or member geometry, or as a result of structural framing. The article is deal with analysis of the behaviour of the structural concrete members under torsion, with calculation procedure and the example according to the US code ACI 318M-08.
Keywords: torsion, reinforced coucrete structures, ACI 318
Design of the resilient bese isolation having type of seismic damping bearing using nonlinear model of matersal (pp. 30 – 37)
Eng. Le Xuân Tung
This article deal with the interaction investigation of seismic base isolation type damping rubber bearing seismic effects. Resilient base isolation type has the cylindrical shape and the mechanical properties of these materials is non-linear. The purpose of this investigation is to find out the dimension of damping rubber in order to amplitude of oscillation attenuate in the first seconds.
Keyword: non-linear dynamics; non-linear mechanical properties; damping rubber.
New concept in the design of structures for earthquake resistance and the national code TCXDVN 375:2006 (pp. 38-42)
A/Prof. Dr. Le Ninh
Recognizing temporary defeats in the seismic prognosis, we have to change the manner of seimic design of the structures. This paper presents the new concept in the design of structures for earthquake resistance and the basic principles of the national code TCXDVN 375:2006.
Evaluation activity of tectonical fault in area of Vungang thermal power plant, Hatinh province (pp. 43-49)
Prof. Dr.Sc.Tran Manh Lieu, A/Prof. Dr. Phan Trong Trinh, Eng. Trinh Viet Bac, Dr. Tran Dinh Ngoc
The data from geotechnical, geophysical investigation for design had doubts about anomaly of geological - geophysical structure existing in the area. It may be tectonic fault or fractural zone. This paper behaves the geological - geophysical anomaly by: Seismic test; micro seismic test ; geothermal test; survey geological, geomorphologic and tectonic; geological, tectonic inspectional works; Satellite image Interpretation.
Results of investigation are presented :
1. There is no active fault as well as large fault and ancient fault cut through the area intending Vung Ang 1 thermal power plant. The base in this area are only cut by small fracture zone oriented 150-160o, 40-50o and 70-80o.
2. In the area Vungang, far 10 km from south of plant, there is one small active fault to be found. The fault can be possible develop seismic with magnitude of 5.6 and can influence the buildings on the plant. The another fault existing in the area Vung Ang such as Rao Nay fault (far 35 km from the plant) do not influence on the buildings on the plant.
Method of inspection control of energy efficiency for ventilating and air-conditioning systems (pp.50-54)
Eng. Ta Xuan Hoa, Eng. Nguyen Tuan Anh
This paper presents orientation to set up the method of inspection control of energy efficiency for ventilating and air-conditioning systems of construction projects in Vietnam. Important contents and steps of carrying out of process of inspection control include: some basic requirements of inspection control, inspection condition and task, checking content of energy efficiency of equipments, order of checking and establishment, maintenance and usage of data of condition of equipments of ventilating and air-conditioning systems
Assessment of in-situ compressive strength according to EN 13791:2007 (pp. 55-61)
Dr. Hoang Minh Duc
In-situ compressive strength of concrete is a very essential characteristic in assessment conformity of newly constructed structures, evaluation of existing structures, ect... and can be assessed according to TCXDVN 239:2006 in Vietnam or to EN 13791:2007 in Europe. Note that, there are some differences in techniques for estimating in-situ compressive strength of these standards. This article focuses on application of EN 13791:2007 in details and compares EN 13791:2007 with TCXDVN 239:2006.
Discussion about collecting time of GPS signal in establishing of the short surveying edge network by using GPS technology (pp. 62-68)
Eng. Doan Van Chinh, Eng. Ngo Xuan The, MEng. Bui Thi Kien Trinh
With the application of GPS in construction surveying control network has actually enhance economic efficiency, because it is not highly dependent on season, weather, same time significantly reducing staff in human resources, time out field measurements. however, at present in Vietnam there are other provisions are not appropriate signal collection time outside the field. Based on theoretical analysis and experimental results, the article content demonstrated: In some specific conditions, duration of time collecting GPS signal not significantly affect the position of the points in the network using the short edge technology GPS. Some conclusions of this paper contribute to further enhance the economic efficiency of GPS technology.
Discussion on quality control of facade structures of high rise buildings (pp. 69-72)
A/Prof. Dr. Tran Chung
This paper presents discussions about quality control of facade structures (made from glass and aluminum) of high rise buildings in Vietnam and in the world. Some existing problems and some important proposals are presented in this paper.