Tạp chí KHCNXD

Tạp chí KHCN Xây dựng số 1/2010

Ngày tạo : 15/07/2015

Tạp chí KHCN Xây dựng số 1/2010

PGS. TS. Cao Duy Tiến, PGS. TS. Trần Chủng
Về quy chuẩn kỹ thuật quốc gia “phân loại, phân cấp công trình xây dựng dân dụng, công nghiệp và kỹ thuật hạ tầng đô thị”,
TS. Lê Minh Long
Thiết  lập trình tự tính toán độ bền của cấu kiện chịu uốn xoắn đồng thời,  
ThS. Vũ Thành Trung, GS. Yukio Tamura, PGS. Akihito Yoshida
Tải trọng gió tác dụng lên các tấm che nắng trên mái công trình có hoặc không có tường chắn mái,
TS. Đinh Văn Thuật, PGS. TS. Phạm Văn Hội
Giải pháp kết cấu liên hợp thép bê tông cho nhà nhiều tầng ở Việt Nam, 
ThS. Nguyễn Văn Tú, GS. TSKH. Nguyễn Văn Hợi
Tính toán động lực học khung phẳng đàn – dẻo có kể đến ảnh hưởng của lực dọc đến trạng thái giới hạn dẻo của tiết diện,
TS. Vũ Văn Đại, KS. Phùng Thế Hiệu
Một số kết quả từ công tác triển khai chương trình mục tiêu Quốc gia về sử dụng năng lượng tiết kiệm và hiệu quả trong các công trình xây dựng ở Việt  Nam,
ThS. Khương Văn Huân, PGS. TS. Lê Minh
Đặc điểm môi trường nước chua phèn gây ăn mòn bê tông cốt thép công trình thủy lợi ở khu vực Đồng bằng sông Cửu Long,
TS. Nguyễn Quang Phú
nh hưởng của tỷ lệ nước/xi măng đến các tính chất của bê tông tự lèn,  
TS. Vũ Thặng
Đảm bảo công tác khảo sát địa hình công trình dạng tuyến bằng toàn đạc điện tử và mô hình số độ cao,
KS. Ngô Xuân Thế
ng dụng phần mềm sufer 32 để thể hiện một số kết quả quan trắc lún công trình, 

ABSTRACT
National technical regulation on Classification and Grading of Civil and Industrial Buildings and Urban Infrastructure (pp. 3-7)
A/Prof. Dr. Cao Duy Tien, A/Prof. Dr. Tran Chung
According to Decree No. 127/2007/NĐ-CP by the Government on implementing articles of the Standard and Regulation act, dated 30 September 2009, the Minister of Construction signed Circular No. 33/2009/TT-BXD on promulgating the national regulation of classifying type, class of civil, industrial building and technical infrastructure of urban, named QCVN 03:2009/BXD that comes into effect on 30/3/2010. The authors want to clarify bases and notes in detail aimed at convenient application of the regulation. 
Establish the procedure for calculation of resistance of elements under tortion and moment (pp.8-11)
Dr. Le Minh Long
This article is concerned to establish the procedure for calculation of resistance of structural elements wording under tortion and moment according to vietnamese design standard for concrete and reinforced concrete elements “TCXDVN 356:2005”. The established procedure in shown the calculation steps for the varios modes of failure in tortion. This procedure is capable to use in design elements wording under tortion and moment.
Wind loading on porous sunshade roof cover sheets on a building roof with and without parapet (pp. 12-19)
MEng. Vu Thanh Trung, Prof. Yukio Tamura, A/Prof. Akihito Yoshida
The porous sunshade roof cover sheet is a new structure used for heat isolation on building roofs. This paper describes a parametric wind tunnel study that investigated the effects of parapet on wind loading on porous sunshade roof cover sheets for a low-rise building based on 1:50 scale wind tunnel measurements. Perimeter parapets of four heights (hp =  15, 30, 45 and 60 mm) were used to investigate their effects on wind loading of the porous sunshade roof cover sheets through results of wind pressure coefficients, wind force coefficients, and cross-correlation coefficients between upper and lower surface pressures.Some important conclusions were obtained from this study.     
Solution of composite steel and concrete structures for multi-storey buildings in Vietnam (pp.20-26)
Dr. Đinh Van Thuat, A/Prof. Dr. Pham Van Hoi
Composite steel and concrete structures have been in effective use in many countries for construction of multi-storey building structures and those with long span frames, due to the benefits of combining individual features of mechanical and thermal characteristics of both steel and concrete materials. This paper is to present solutions of constructional detailing, advantanges and basic rules for analysis and calculation of composite structural members. Also the paper will provide relevant comments and suggestions on the practical application of the solution of composite steel and concrete structures for design of multi-storey buildings in Vietnam.
The Dynamic Calculation of Elasto – Plastic Plannar Frames Considered Effect of Axial Load for Plastic Limit State of Cross – Sections (pp. 27-32)
MEng. Nguyen Van Tu, Prof. Dr. Sc. Nguyen Van Hoi
The paper presents methods and results on the computation of bilinear elasto – plastic plannar frames subjected to dynamic loads with consideration of effect of axial load for plastic limit state of cross – sections. The structures were computed by finite element method. Non-linear motional equation of structures was solved by Newmark method combined with modified Newton – Raphson method. Based on the results obtained by numerical study with frame structures, the report provides remarks in values of dynamic displacement and internal force when considered effect of axial load for plastic limit state of cross – sections.
Results from the National Program of Energy saving and efficiency for buildings in Viet Nam (pp. 33-39)
Dr. Vu Van Dai, Eng. Phung The Hieu
This paper presents briefly some outcomes of the National program of Energy saving and efficiency over the last 10 years in the construction sector supported by the Government. Besides, advantages are evaluated and disadvantages are indentified.
The characteristics of acid water enviroment caused corroding reinforced concrete of hydraulic structures in the Mekong delta (pp. 40-44)
MEng. Khuong Van Huan, A/Prof. Dr. Le Minh
The Mekong Delta with area is about 390.000 square kilometer. Sixty percent (60%) of this area affected by acidity and salimity intrusion. Most of hydraulic reinforced concrete structures are corroded in acid environment. Base on studying results, the main reasons for corroding of hydraulic reiforced concrete structures are the high concentration of sulphate ion and low pH  value in the water environment. This area affected by water environment with low pH causes corrody reiforced concrete structures approximated 60% area of  the Mekong Delta, in which 10% of this area causes high corrding.
Influences of W/C ratio on some properties of self-compacting concrete (pp. 45-50)
Dr. Nguyen Quang Phu
Self-compacting concrete (SCC) has specific performance advantages over conventional concrete in the progress of work of reinforced concrete constructions, especially constructions with high amount of steel rod. SCC mixtures are always produced with water/cement (W/C) ratios in the different range, it depends on the self-compactibility. Adjustment of the water/cement ratio and superplasticizer dosage is one of the main key properties in proportioning of SCC mixtures. In this paper, five mixtures with different combinations of water/cement ratio and superplasticizer dosage levels were studied. Several tests such as slump flow, V-funnel, L-box were carried out to determine optimum parameters for the self-compactibility of mixtures. Compressive strength development, modulus of elasticity and splitting tensile strength of mixtures were also measured and predicted.
Using total station and edm in topographical survey of linear – works (pp. 51-54)
Dr. Vu Thang     
This paper presents the specific characteristics and topographical survey demand of line- works. It also presents the advantages of using modern equipments and technologies in topographical survey of linear-works.
Using the Golden software Suffer32 for interpretation the settlement monitoring results by the contour – line and 3D surface (pp. 55-60)
Eng. Ngo Xuan The
According to Vietnamese Standard TCXDVN 271:2002, settlement monitoring is one of obligatory task of the Owner. The process of this work includes different steps, among them compiling the technical report and summarizing the monitoring result is very important one. This article presents possibility of using the Golden software Suffer32 for interpretation the settlement monitoring result by the contour – line and 3D surface. Usage of this software is quite simple, but it reduces the time for compiling the report and enhances considerably the quality of technical report on settlement monitoring.

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