Tạp chí KHCNXD

Tạp chí KHCN Xây dựng số 3/2007

Ngày tạo : 15/07/2015

Tạp chí KHCN Xây dựng số 3/2007

PGS.TS. Nguyễn Xuân Chính, TS. Nguyễn Đại Minh
Bão, tố và lốc ở Việt Nam,
TS. Nguyễn Võ Thông
Một số vấn đề liên quan đến tính toán thiết kế vỏ lò phản ứng nhà máy điện nguyên tử,
TS. Nguyễn Hồng Hà, TS. Nguyễn Anh Tuấn
Tính toán tác dụng của động đất theo phương pháp phổ phản ứng bằng phần mềm phân tích kết cấu thông dụng,
ThS. Nguyễn Quốc Hùng, PGS.TS.Nguyễn Tiến Chương
Tính toán khung thép có liên kết nửa cứng phi tuyến,
ThS. Hoàng Quang Nhu
Nghiên cứu thực nghiệm xác định tổn hao ứng suất trước do từ biến và co ngót của bê tông,
ThS. Nguyễn Đức Thắng, GS. TSKH. Nguyễn Văn Hợi
Tính toán động lực kết cấu vỏ thoải có các gối tựa đàn hồi phi tuyến,
ThS. Nguyễn Hải Quang
Tính toán tải trọng do động đất gây ra cho nhà nhiều tầng có độ cứng ngang không đều,
ThS. Trần Quang Hộ, KS. Nguyễn Trọng Nghĩa, KS. Nguyễn Đăng Đình Chung
Hiệu quả kinh tế của móng bè - cọc,
KS. Lê Quang
Công nghệ nối cốt thép bằng ống ren thẳng có dập tù đầu ống nối,

ABSTRACT
Hurricanes, typhoons and tornados in Vietnam (pp.3- 6)
A/Prof. Dr.Nguyen Xuan Chinh, Dr.nguyen dai minh
In this paper, the authors present a general situation of Hurricanes, typhoons and tornados in Vietnam, the influence of hurricanes on houses and building constructions. In addition, the authors also point out the basic principles that should be applied in planning, designing and constructing dwelling houses of the people living in the hurricane-prone areas.
Some matters relating to calculating and designing the envelope of reactors of nuclear power plants (pp.7- 14)
Dr. Nguyen Vo Thong
The envelope of reactors of nuclear power plants is a special structures. The calculation and design of this structure have to be done with particular requirements different from that required by other ordinary structures.
In this paper, the author present some matters relating to design principles, loads and action and the structural solutions common used for design of the envelope of reactors of nuclear power plants is a special structures.
Calculation of seismic actions according to response spectrum method by using the common structural analyzing softwares (pp.15- 17)
Dr.nguyen Hong Ha, Dr.nguyen anh tuan
This paper introduces to the readers the way to apply the analyzing abilities according to the response spectrum to the analysis and design of earthquake – resistant building structures by using the available common structural analyzing softwares. To make this clear, in the paper, the authors present the calculation of seismic actions by the response spectrum method and the application of common structural analyzing softwares to the analysis of seismic actions according to the response spectrum method to the readers.
Analysis of steel frames with non-linear semi-rigid connections (pp.18- 26)
MEng. nguyen quoc hung, A/Prof. Dr.Nguyen tien chuong
In many cases, the beam-to-column joint of steel frames is not completely rigid or hinged as usually modeled in structural analysis. In these cases, the relationship between moment and the rotation is in conformity with a non-linear rule and the rigidity of the joint varies according to the acting process due to the load.
This paper presents an analysis of steel frames with non-linear semi-rigid connections, applying the principle of virtual work and the moment-rotation curves model declared by Frye-Morris with constants regulated by Dhillon and O’Malley.
A calculation program was also established to apply to a case study. The calculated results show that the non-linear semi-rigid joints have a significant influence on the behaviour of the steel frames.
An investigation prestress loss of prestressed concrete structures due to creep and shrinkage(pp.27- 30)
MEng. hoang quang nhu
The time-dependent losses of concrete creep and shrinkage are all of significant importance in prestressed concrete structures. The most accurate way of determining the time-dependent prestressed loss is by testing or by using results obtained from measurements on similar local concretes. This paper presents the exprimental program conducted by author at the IBST. The results from measurement are compared to that of theoretical methods.
Calculation of dynamic response of shallow shells having non-linear elastic supports (pp.31- 38)
MEng. nguyen Duc Thang, Prof. Dr. Sc. Nguyen Van Hoi
This paper presents the research results on the dynamic response of shallow shells that have non-linear elastic supports using the finite element method. There were built the equations, algorithms and program to calculate the dynamic displacements and inner forces of shells. These parameters were calculated in case of short-time dynamic load acting on shell. These results are compared to that obtained for corresponding shallow shells having linear elastic supports and shown that the impact of the non-linear elasticity of supports on the behaviour of the shell structures is significant.
Calculation of loads due to earthquakes for multi-story building frames with irregular rigidity (pp.39- 45)
MEng. Nguyen Hai Quang
Up to now present the calculation ofoscillation of muilti-story building frames with regular rigidity has been dealt with by many authors. However, there are very few authors paying attention to the oscillation of muilti-story building frames with irregular rigidity. In fact, due to the architectual requirements, many muilti-story building frames with irregular rigidity are present. In this paper, the author presents a calculation of oscillation multi-story building frames with irregular rigidity and illustrate the calculation methods with some specific calculation examples.
Economical effectiveness of piled-raft foundation (pp.46- 51)
MEng. Tran Quang Ho, Eng. Nguyen Trong nghia, Eng. Nguyen Dang Dinh Chung
Piled-raft foundation is a system of pile, raft and soil. Pile reduces settlement and withstands most of vertical loads acting on a building. Raft reduces differential settlement, takes horizontal loads and especially a part of vertical loads (maybe over 30% total load). The interaction among pile, raft, and soil is considered in the analysis of the system. In this report, Poulos’ researches as well as recent researches are applied to solve the problem of piled-raft foundation. The successful analysis gains considerable economical effectiveness
Technology of straight threaded rebar splicewith upsetting end (pp.52- 56)
Eng. Le Quang
At present in Vietnam, there are two ways to connect steel bars for construction: by binding with small steel wire or by welding. There are many shortcomings of these methods: binded or welded steel bars do not work centrically, the connections are not firm and easy to be displaced during concreting,..
In this paper, the author introduces an advanced technology for connecting steel bars for construction: splicing straigt threaded rebars with upsetting end. Content of the paper is extracted from the result of the research theme “Straight threaded rebar splice with upsetting end – Execution and Acceptance” done by the Center of Construction Technology, Institute for Building Science and Technology (IBST).

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