Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“ MẤY VẤN ĐỀ CHUNG KHI THIẾT KẾ THEO
Trang 1VIETNAM-GERMANY SEMINAR
October 17th 2006
at the University of Transport and Communications (UTC) – Hanoi
PROCEEDINGS SUMMARY
NEW DEVELOPMENTS IN
BRIDGE ANALYSIS AND DESIGN
Trang 2Ban tổ chức
TS Trần Đắc Sử - Hiệu trưởng Trường Đại học GTVT
GS TS Nguyễn Viết Trung - Đại học GTVT
PGS TS Trần Đức Nhiệm - Đại học GTVT
PGS TS Hoàng Hà - Đại học GTVT
TS Thái Hà Phi - Đại học GTVT
TS Lê Hải Hà - Đại học GTVT
TS.Nguyễn Duy Tiến - Đại học GTVT
Ban thư ký
Vũ Bích Huệ
Hồ Xuân Nam
Nguyễn Việt Quân
Nguyễn Hữu Thuấn
Chu Văn An
Ngô Văn Minh
Địa chỉ liên hệ
Bộ môn Cầu Hầm – Khoa Công trình
P 203 – A6 - Đại học GTVT
Láng Thượng - Đống Đa – Hà Nội
Điện thoại: +84-4-7668029
E-mail: bomoncauham@uct.edu.vn
Website: http://cauham.uct.edu.vn
Organizing Board
Dr Dac Su Tran - Rector of the UTC Prof.Dr Viet Trung Nguyen - UTC Prof Dr Duc Nhiem Tran - UTC Prof Dr Ha Hoang - UTC
Dr Ha Phi Thai - UTC
Dr Hai Ha Le - UTC
Dr –Ing Duy Tien Nguyen - UTC
Secretariat
Bich Hue Vu Xuan Nam Ho Viet Quan Nguyen Huu Thuan Nguyen Van An Chu
Van Minh Ngo
Contact Address
Section of Bridge and Tunnel Engineering Suite 203 – A6 - University of Transport and Communications Lang Thuong – Dong Da - Hanoi
Tel.: +84-4-7668029 E-mail: bomoncauham@uct.edu.vn
Website: http://cauham.uct.edu.vn
Trang 3Lời giới thiệu
Trong những năm qua, kể từ đầu những năm 1990 trở lại đây, lĩnh vực xây dựng cơ
sở hạ tầng GTVT nói chung và xây dựng cầu nói riêng ở Việt Nam đã có những bước phát
triển mới, mạnh mẽ và đạt được những thành tựu quan trọng Nhiều tiến bộ về khoa học,
kỹ thuật và công nghệ đã được áp dụng, góp phần tạo nên những công trình chất lượng,
hiện đại ngang tầm khu vực và quốc tế Các dạng kết cấu - công nghệ móng sâu, kết cấu
và công nghệ cầu bê tông dự ứng lực nhịp lớn, cầu dây xiên, cầu treo dây võng, cầu
Extradosed, cầu dàn thép thế hệ mới đang ngày càng được áp dụng rộng rãi ở khắp các
vùng miền
Cùng với việc ứng dụng các kết cấu và công nghệ mới, việc tính toán thiết kế kết cấu
công trình cầu cũng có nhiều thay đổi theo hướng hiện đại, hoàn thiện và hội nhập Bằng
việc nghiên cứu ứng dụng và chính thức ban hành bộ tiêu chuẩn thiết kế cầu mới
(22TCN-272-01 và 22TCN-272-05), những người làm cầu Việt Nam có cơ hội được vận dụng
những thành tựu mới, tiên tiến trong việc nghiên cứu ứng xử của kết cấu cầu dưới tác
dụng các loại tải trọng, các chuẩn mực về rủi ro (sự cố) và độ an toàn theo phương pháp
trạng thái giới hạn với các hệ số độ tin cậy riêng - cở sở để xây dựng các bộ tiêu chuẩn
tiên tiến nhất hiện nay như Eurocode (tiêu chuẩn châu Âu), AASHTO LRFD, DIN (tiêu
chuẩn của CHLB Đức), BS5400 (tiêu chuẩn thiết kế cầu của Vương quốc Anh),
Hội thảo khoa học Việt - Đức lần này được tổ chức với sự hỗ trợ của DAAD (Cơ
quan trao đổi hàn lâm Đức) nhằm tập trung giới thiệu những kết quả nghiên cứu về những
vấn đề liên quan đến tính toán thiết kế cầu theo các tiêu chuẩn thiết kế mới của các nhà
khoa học đến từ các Trường đại học của CHLB Đức, Nhật Bản và các nhà khoa học ở các
Trường đại học, các Viện Khoa học Công nghệ và Hội Khoa học Kỹ thuật Cầu đường
Việt Nam
Ban tổ chức xin chân thành cảm ơn các đơn vị và các nhà khoa học đã tham gia và có
bài viết cho Hội thảo khoa học Việt - Đức lần này
Do hạn chế về thời gian, việc biên tập và in ấn các nội dung bài viết không thể tránh
khỏi những thiếu sót Mọi góp ý xin gửi về Ban tổ chức hội thảo
T/M BAN TỔ CHỨC
PGS TS Trần Đức Nhiệm
Đại học Giao thông Vận tải
Foreword
In recent years, especially from the 1990s, the transport infrastructure engineering in general and bridge engineering in particular in Vietnam have seen new, strong developments and have attained important achievements Many advances in science, engineering and technology have been applied, making contributions to high-quality, modern works reaching the regional and world class Such types of structure and technology as deep foundations, long-span prestressed concrete bridges, cable-stayed bridges, suspension bridges, Extradosed bridges, steel bridges of modern generation, are widely applied day by day in all regions of the country
Along with the application of new structures and technologies, the analysis and design of bridge structures also have many changes towards modernity, completeness and integration Through applied research and the official release of new Bridge Design Specifications (22TCN-272-01 and 22TCN-272-05), Vietnamese bridge engineers have the chance to apply new and advanced achievements in studying the behavior of bridge structures under different loadings with the standards of risk and reliability according to the Method of Limit States with partial reliability factor - fundamentals for current most advanced Specifications such as: Eurocode, AASHTO LRFD, DIN, BS5400,
The Vietnam-Germany seminar this time is organized with the support of DAAD (German Academic Exchange Service) in order to introduce new research results regarding the analysis and design of bridges according to new Design Specifications, by scientists from German and Japanese universities, from Vietnamese universities, Institutes for Science and Technology and Vietnam Bridge & Road Association
We would like hereby to express sincere thanks to institutions and scientists who have made valuable contributions to the Vietnam-Germany seminar this time
Due to lack of time, errors in the editing and printing work of the papers are inevitable, please feel free to contact the Organizing Board for any suggestion and/or comment
Hanoi, in October 2006
On behalf of the Organizing Board
Prof Dr Duc Nhiem Tran
University of Transport and Communications
Trang 4Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“
MẤY VẤN ĐỀ CHUNG KHI THIẾT KẾ THEO
TIÊU CHUẨN THIẾT KẾ CẦU 22TCN-272-05
SOME GENERAL ISSUES IN APPLICATION
OF THE 22 TCN-272-05 BRIDGE DESIGN SPECIFICATIONS
Prof Dr Xuan Lam Dao
Vietnam Bridge and Road Association
Abstract: The 22 TCN-272-05 Bridge Design Specifications have been
published for five years In the process of application there are some
issues on design philosophy need further explain, some general
provisions must be readjusted and the “Open character” of the
Specifications should be comprehensively understood These are main
contents of the paper
DESIGN OF CONCRETE BRIDGES ACCORDING TO EUROCODE AND DIN
ACTIONS AND SERVICEABILITY LIMIT STATE
-Prof Dr.-Ing Carl-Alexander Graubner
Dr.-Ing Holger Schmidt Dipl.-Ing Andreas Greck
Institute for Concrete Structures Darmstadt University of Technology
Abstract: Concerning the analysis and the design of concrete bridges in
Europe, new standards have to be regarded at national and international
level The European standard DIN V ENV 1991 with parts 1 and 3 (EC 1
part 1 and part 3) includes regulations regarding the safety concept and
the design of actions on bridges In addition to DIN V ENV 1992 part 1
(EC 2 part 1), which is already established for building constructions, the
the specifics of bridge constructions This paper focuses on the actions that have to be applied on road bridges according to national and international standards as well as on special checks in the serviceability limit state, regarding the regulations according to the technical report DIN FB 102
VỀ CẬP NHẬT MỘT VÀI NỘI DUNG TIÊU CHUẨN
22 TCN-272-05 LIÊN QUAN ĐẾN TÍNH TOÁN ĐỘNG ĐẤT ĐỐI VỚI CÔNG TRÌNH CẦU
ABOUT UPDATING SOME CONTENTS IN BRIDGE DESIGN SPECIFICATIONS
22 TCN-272-05 CONCERNING THE SEISMIC DESIGN FOR BRIDGES
Prof Dr Viet Trung Nguyen
Section of Urban Transport Works University of Transport and Communications
Abstract: This paper presents some new developments regarding the seismic
design in Vietnam and also brings out suggestions to apply these developments
in updating some contents dealing with the earth-quake design in the Bridge Design Specifications 22 TCN-272-05
Trang 5Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“
MỘT SỐ VẤN ĐỀ TRONG THIẾT KẾ MỐ CẦU THEO
TIÊU CHUẨN THIẾT KẾ CẦU 22 TCN - 272 - 05
ON SOME ISSUES REGARDING SUBSTRUCTURE DESIGN
IN BRIDGE DESIGN SPECIFICATIONS 22 TCN-272-05
Prof Dr Minh Nghia Nguyen MSc Cam Nhung Nguyen
Section of Bridge and Tunnel Engineering University of Transport and Communications
Abstract: This paper presents the method of calculating earth pressure
on bridge abutment complying with bridge design specifications from
several countries and 22 TCN-272-05 of Vietnam The integral
abutments and mechanically stabilized earth (MSE) abutments are also
discussed in terms of detailing, structural analysis and their applications
PHÂN TÍCH TÍNH NĂNG VÀ ỨNG DỤNG BÊ TÔNG
TÍNH NĂNG CAO VÀO CÁC CẦU LỚN
Ở ĐỒNG BẰNG SÔNG CỬU LONG
PERFORMANCE ANALYSIS AND APPLICATION OF HIGH-PERFORMANCE
CONCRETE IN LONG-SPAN BRIDGES IN MEKONG DELTA
Prof Dr Duy Huu Pham
Institute for Science and Technology in Transport Construction
University of Transport and Communications
Abstract: This paper deals with the analysis of compressive strength,
Cloride ion impermeability, financial cost and the structure solutions for
application of high-performance concrete in long-span bridges in
Mekong delta
CALCULATING TRANSVERSE VIBRATION OF BEAM BRIDGES UNDER THE ACTION OF SOME MOVING BODIES IN VIETNAM
Prof Dr Van Khang Nguyen Minh Phuong Nguyen
Hanoi University of Technology
Prof Dr Ha Hoang
University of Transport and Communications
Abstract: In the present paper the method of substructures is used to derive
transverse vibration equations of continuous beam on intermediate hard and elastic supports under the action of moving bodies An algorithm for calculating the solutions of vibration equations of continuous beam is represented From this algorithm, a computer program is created using C++ language This computer program has been used in order to calculate transverse vibration of some beam bridges, which are built in Vietnam
DESIGN OF CONCRETE BRIDGES IN ULTIMATE LIMIT STATE
ACCORDING TO DIN-SPECIFICATIONS
Prof Dr –Ing habil Nguyen Viet Tue MEng Duc Tung Nguyen
Institute for Structural Concrete and Building Materials
University of Leipzig
Abstract: For the design of structure, a set of performance criteria and stability
that must be met when the structure is in ultimate limit state If the ultimate limit state is reached, the structure will fail This can be caused by loss of global equilibrium, by reaching critical strain conditions at the most stressed cross section, by failure of stability as well as fatigue of the materials In this paper we present briefly an overview of the calculation models in ultimate limit state adopted by DIN-Specifications for design of bridges in Germany
Trang 6Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“
PHÂN TÍCH MÔ HÌNH BÀI TOÁN ĐIỀU CHỈNH
NỘI LỰC TRONG CẦU TREO DÂY VĂNG
ANALYSING MODEL OF INTERNAL FORCE ADJUSTMENT
IN CABLE-STAYED BRIDGE
Prof Dr Dac Chinh Le MSc Trong Nghia Nguyen
Section of Informatics in Civil Engineering University of Transport and Communications
Abstract: This article concentrates on analysing model of internal force
adjustment in cable-stayed bridge, which is constructed by free cantilever
method (FCM) An illustration proceduced by using RM2000 program is
also given
NGHIÊN CỨU TĂNG CƯỜNG KHẢ NĂNG CHỊU LỰC CỦA
CẦU BÊ TÔNG DỰ ỨNG LỰC KHU VỰC ĐỒNG BẰNG SÔNG
CỬU LONG BẰNG PHƯƠNG PHÁP DỰ ỨNG LỰC NGOÀI
RESEARCH ON STRENGTHENING OF THE RESISTANT CAPABILITY OF
PRESTRESSED CONCRETE BRIDGES IN CUULONG RIVER DELTA
BY EXTERNAL PRESTRESSING METHOD
Dr Ngoc Long Nguyen MSc The Truyen Tran Eng Van Hau Nguyen
Section of Bridge and Tunnel Engineering University of Transport and Communications
Abstract: This paper presents the situation of prestress concrete bridges
being exploited in Cuu long river delta region, mesures to strengthen
resistant capability by solution of using external prestressing method,
corresponding computing models, some applications in practice with a
number of bridges in 60 national highway in Bentre province Learning conclusions about the feasibility of the application of external prestress method
to strenthen the resistant capability of the entire system of prestress bridges in this region, the proposed petitions to deploy this application with the best
efficiency
XỬ LÝ CẤU TẠO TRỤ CẦU BẰNG PHƯƠNG PHÁP
SƠ ĐỒ HỆ THANH
DETAILING BRIDGE PIERS USING STRUT-AND-TIE MODELS
Dr -Ing Duc Thanh Nguyen Eng Viet Hai Do
Faculty of Bridge and Road Engineering Danang University of Technology
Abstract: The paper shows some main results of a research on working
behaviour of some reinforced concrete piers and application of strut-and-tie models for their design An example on detailing piers of the Thuan Phuoc approach bridge done according to the specifications 22TCN -272-05 is given
to illustrate this new design method
Trang 7Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“
MODELING AND ANALYSIS OF THUAN-PHUOC SUSPENSION
BRIDGE IN CONSTRUCTION STAGES USING MIDAS/CIVIL
Dr.-Ing Dang Quang
Ngo
Section of Structural
Engineering
University of Transport and
Communications
Dr.-Ing Duc Thanh Nguyen
Faculty of Bridge and Road Engineering Danang University of Technology
MEng Ngoc Linh Tran
Section of Informatics in Civil Engineering University of Transport and Communications
Abstract: In the family of bridge structures, suspension bridges can be
distinguished by their ability to overcome large spans They are also one
of the most beautiful bridge structure types However, because of their
structural characteristics, the analysis of suspension bridges, especially in
the construction stages, is always a big challenge for the engineers This
paper outlines some characteristics in the modeling and analysis of
suspension bridge structure in the construction stage It also gives an
overview of theories and software applying for analysis of suspension
bridge structure in practice As an example, the paper presents the
analysis process of Thuan-Phuoc suspension bridge, the currently biggest
suspension bridge in Vietnam using the program MIDAS/Civil
VỀ BỀ RỘNG CÓ HIỆU CỦA BẢN BÊTÔNG TRONG CẦU DẦM LIÊN HỢP THÉP – BÊTÔNG CỐT THÉP TRONG MỘT SỐ TIÊU CHUẨN THIẾT KẾ HIỆN HÀNH
PROVISION OF EFFECTIVE FLANGE WIDTH FOR STEEL-CONCRETE COMPOSITE
BRIDGE BEAMS IN CURRENT DESIGN SPECIFICATIONS
Prof Dr Duc Nhiem Tran Eng Manh Hai Nguyen
Section of Bridge and Tunnel Engineering University of Transport and Communications
Abstract: In the analysis and design of steel-concrete composite girders of a
bridge, deflections, stresses, and strengths are typically obtained from elementary beam bending theory by utilizing the effective flange width concept Besides the exact numerical valuas that can be given by numerical analysis of a bridge, it is necessary that code provisions should provide simplified practical method of evaluation of effective flange width without significant loss of accuracy So each code implements different ideas and approaches for specifying effective flange width Comparing them highlights distinct philosophies underlying the various effective width code formulations, which is the main objective of this paper In this paper, the effective flange width provisions in the Vietnam, US, Britain, Canada, Japan and European Committee are presented and compared Characteristics of each provision are briefly described and summarized Numerical comparisions for simply-supported spans and negative moment regions of continuous spans follow
Trang 8Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“
TỔNG QUAN VỀ CÁC ĐẶC ĐIỂM CỦA CẦU EXTRADOSED
GENERAL CHARACTERISTICS OF EXTRADOSED BRIDGES
Dr –Ing Duy Tien Nguyen Eng Viet Quan Nguyen
Section of Bridge and Tunnel Engineering University of Transport and Communications
Abstract: Extradosed bridge has a relatively short history of
development as compared with other modern long-span bridges like arch
bridge, cable-stayed or suspension bridges However this type of bridge
has been developed and introduced in many countries in the world, from
Europe, Japan, the United States to many Asian countries and Vietnam
Especially in Japan Extradosed bridge has been researched and
developed for many types of structure and materials This report
summarizes the history of development of Extradosed bridge in the
world, basic features and study results of some structural parameters It is
the hope of the authors that Extradosed bridge be further researched and
developed in Vietnam and in the world to become a suitable option for
long-span structures, especially in a restricted space and in the current
economic situation in Vietnam
PHÂN TÍCH VÙNG CHỊU LỰC CỤC BỘ TRONG KẾT CẤU CẦU BÊ TÔNG CỐT THÉP BẰNG MÔ HÌNH HỆ THANH
ANALYSIS OF D-REGION IN CONCRETE BRIDGES USING STRUT-AND-TIE MODELS
Dr –Ing Duy Tien Nguyen
Section of Bridge and Tunnel Engineering University of Transport and Communications
MEng Ngoc Linh Tran
Section of Informatics in Civil Engineering University of Transport and Communications
Abstract: STM (Strut-and-Tie Model or Stabwerkmodell) is a suitable model
for analysis and design of D-regions in concrete structures in which the flows
of force in the structure are modelled through a truss analogy This report summarizes basic theory, the verification of STM according to the Bridge Design Specifications 22 TCN-272-05 and some research results in application
of STM in dimensioning and detailing of D-regions in concrete bridges It is the hope of the authors that STM be familiar to Vietnamese students and
engineers in dealing with D-regions in concrete bridges
Trang 9Hội thảo khoa học Việt - Đức “Những vấn đề mới trong tính toán thiết kế cầu“ Vietnam - Germany Seminar „New Developments in Bridge Analysis and Design“
XÉT ẢNH HƯỞNG CỦA TẢI TRỌNG CHẤT THÊM ĐẾN
TẦN SỐ DAO ĐỘNG RIÊNG CỦA KẾT CẤU NHỊP CẦU
INFLUENCE OF ADDED MASS TO BRIDGE VIBRATION FREQUENCIES
MSc Viet Hung Vu Prof Dr Duc Nhiem Tran
Section of Bridge and Tunnel Engineering University of Transport and Communications
Abstract: Vibration of bridges structures remains an interesting subject
for researchers and engineers of everytime This paper presents a
fundmental study in vibration of bridges structures This is the influence
of added mass in bridge to its natural frequencies of vibration A brief
review bridges vibration will be presented and some applicated cases will
be illustrated in beam structures by the finite element method
VỀ ỨNG DỤNG MÔ PHỎNG SỐ BÊ TÔNG
TRONG THIẾT KẾ CẦU Ở VIỆT NAM
ABOUT THE APPLICATION OF THE NUMERICAL SIMULATION
OF CONCRETE IN BRIDGE DESIGN IN VIETNAM
MSc The Truyen Tran
Dr Ngoc Long Nguyen
Section of Bridge and Tunnel Engineering University of Transport and Communications
Abstract: This paper presents the situation of application of the
numerical simulation applied in concrete structures design in general and
in concrete bridge structures design in particular in Viet nam up to this
time, summarizes the material model used in concrete modelling,
approaches of computing, proposes the choice of the rational model and approach in numerical simulation of concrete bridge structure components under present condition in Viet nam, concludes finally about the difficulty, solution to overcome and the way to develop of the numerical simulation in bridge design in Viet nam
STUDY ON INSTABILITY OF SUPER LONG-SPAN
CABLE-STAYED BRIDGES
Pham Hoang Kien Hitoshi Yamada Hiroshi Katsuchi
Department of Civil Engineering Yokohama National University
Abstract: In this paper, the structural and aeroelastic stability of super
long-span cable-stayed bridges with main long-span length of 1200R1800m is presented Firstly, the buckling instability of the girder under in-plane loading is examined by three-dimension buckling large displacement analysis Secondly, the static aeroelastic behaviors of bridges against displacement-dependent wind load are investigated by three-dimension geometrical nonlinear analysis The drag force, lift force, aerodynamic moment on the girder, the distributed wind force on the cables and the towers are considered in this analysis Thirdly, the coupled flutter instability analyses are carried out The effect of increasing span lengths on dynamic structural properties and the effect of cable vibrations on dynamic behaviors of the structure are investigated Finally, the possibility and limitations of long-span cable-stayed bridges based on static and dynamic instability analysis are discussed The analytical results show that static instability controls the dimension of the girder and the safety against both static and dynamic instabilities can be ensured even with main span
length of 1800m