Rearch on Design of Aluminum Truss Bridge

2010 ◽  
Vol 168-170 ◽  
pp. 1776-1779 ◽  
Author(s):  
Qing Jie Wen ◽  
Yan Jun Qi
Keyword(s):  
Theoretical Basis ◽  
Design Theory ◽  
Technical Difficulty ◽  
Live Load ◽  
Design Standards ◽  
Truss Bridges ◽  
Material Type ◽  
Traditional Design ◽  
Truss Bridge ◽  
Related Design

In recent years aluminum bridges have been constructed in China, but lack of aluminum design and construction standards limits its development. Traditional design theory of concrete and steel can’t be completely adopted for its application in bearing structures. In order to solve technical difficulty, material type, deflection under live load, frequency and bucking of aluminum bridges are analyzed based on aluminum half-opened truss bridges constructed in China. Compared with related design standards at home and abroad, recommendations are put forward to provide theoretical basis for further application and research of aluminum truss bridges.

scholarly journals Study on elastic deformation calculation method of a composite-metal hybrid assembling stringed truss bridge

2019 ◽  
Vol 275 ◽  
pp. 02017 ◽  
Author(s):  
Zigang Zeng ◽  
Li Chen ◽  
Dong Zhao ◽  
Mao Haifeng ◽  
Zhang Dongdong ◽  
...  
Keyword(s):  
Calculation Method ◽  
Live Load ◽  
Truss Bridges ◽  
Steel Bar ◽  
Calculation Results ◽  
New Type ◽  
The Difference ◽  
Steel Sleeve ◽  
Truss Bridge ◽  
Bolt Connection

A composite-metal hybrid assembling stringed truss bridge which based on pre-tightened tooth connection can make full use of the strength of the FRP fiber in the direction of the fiber, and is of higher bearing capacity than the FRP truss bridges with traditional adhesive or bolt connection. However, whether the calculation method of FRP truss bridge with traditional bondingor bolt connection is suitable for this new type of bridge needs to be researched because of the difference on the structural form and connection mode. In order to obtain the suitable method of this kind of bridge, a new method for calculating live load deformation which consider the influence of end of the steel bar sleeve of rod stiffness was established in this paper; the deformation experiment of truss bridge was carried out. The experiment and calculation results show: compared with the calculation method of the live load deformation of the traditional FRP truss bridge, the calculation method of live load deformation considering the effect of the steel sleeve on the end of the rod is in good agreement with the live load deformation obtained by the experiment; the calculation method of inelastic deflection has also been verified by the experimental results.

Strengthening and widening of steel pony truss bridges

1977 ◽  
Vol 4 (2) ◽  
pp. 214-225
Author(s):  
Baidar Bakht ◽  
Paul F. Csagoly
Keyword(s):  
Traffic Safety ◽  
Carrying Capacity ◽  
Point Of View ◽  
Load Carrying Capacity ◽  
Truss Bridges ◽  
Load Carrying ◽  
Live Loads ◽  
Pros And Cons ◽  
Pony Truss Bridge ◽  
Truss Bridge

There are many thousands of existing pony truss bridges in North America which were constructed in the earlier part of this century and are still serving as important traffic carriers. The present economic situation demands that these bridges should usefully serve their purpose for as long as is safely possible.These bridges could be found inadequate for either or both of the following reasons. With the exception of remote areas, operational traffic safety would require two 12-ft lanes plus adequate shoulders. Many of these old bridges are therefore unsatisfactory from the geometrical point of view. Some bridges were designed for live loads that are only a fraction of present commercial vehicle weights.A computer-oriented method of rigorous analysis of lateral buckling behaviour of pony truss bridges is briefly discussed. The method is implemented through a computer program which has been validated by experimental data. It is expected that the program would predict realistic values of load-carrying capacity of such bridges and would help to avoid many an unnecessary replacement.Various methods of strengthening and widening pony truss bridges, and their pros and cons, are discussed. It is shown that the strengthening of a few components of a pony truss bridge does not always lead to an increase in the load-carrying capacity of the bridge.

scholarly journals Design and Research on English Listening Teaching Assisted by Computer Multimedia

2017 ◽  
Vol 12 (01) ◽  
pp. 32 ◽  
Author(s):  
Danlie Ni
Keyword(s):  
Foreign Language ◽  
Theoretical Basis ◽  
Design Theory ◽  
Material Selection ◽  
Teaching Strategy

this paper mainly introduces the theoretical basis, principle and design theory of listening teaching of foreign language assisted with computer multimedia, analyzes the demand of English listening teaching assisted by computer multimedia in one school, collects and analyzes questionnaire carefully and understand the situation of English listening teaching in this school. Explore the practice of English listening teaching assisted by computer multimedia in one school, relating to material selection and teaching strategy of English listening teaching, at the same time; analyze the practice results of English listening teaching assisted by computer multimedia in this school. Sort out and analyze the collected data, attain the results of this exploration and propose suggestions for problems existed in English listening teaching assisted by computer multimedia.

Comparative Study of Cyclic and Shake Table Tests for Simple for Dead Load and Continuous for Live Load Steel Bridge System in Seismic Area

2020 ◽  
Vol 2674 (7) ◽  
pp. 233-243
Author(s):  
Amir Sadeghnejad ◽  
Sheharyar Rehmat ◽  
Islam M. Mantawy ◽  
Atorod Azizinamini
Keyword(s):  
Plastic Hinge ◽  
Longitudinal Direction ◽  
System Level ◽  
Live Load ◽  
Shake Table ◽  
Steel Bridge ◽  
Dead Load ◽  
Design Standards ◽  
Component Level ◽  
Bridge System

A new superstructure to pier connection for simple for dead load and continuous for live load (SDCL) steel bridge system in seismic areas was developed. As proof of concept, component level and system level tests were carried out on scale models. The component test was conducted under cyclic loading and the results showed satisfactory performance conforming to design standards. The same detail was incorporated in a system level shake table testing which was subjected to bidirectional earthquake excitations. The results showed that the connection behaved well under high levels of drift and acceleration. The capacity protected elements sustained minimal damage and the plastic hinge was limited to a predefined location in the column. In this paper, a summary of results from both tests is presented and compared. The results showed that the SDCL components remained within the elastic range. It was concluded that the dowel bars in the cap beam are the main load-carrying elements under excitations in the longitudinal direction of the bridge and the provisions of current design codes are adequate for the design of these reinforcing bars. Both test protocols showed similar behavior despite the differences in construction methods and material properties.

scholarly journals THE PATH FROM FUNCTIONAL TO DETAILED DESIGN OF A CONING ROTOR WIND TURBINE CONCEPT

2011 ◽  
Author(s):  
Curran A. Crawford
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Detailed Analysis ◽  
Theoretical Basis ◽  
Design Theory ◽  
Functional Design ◽  
Detailed Design ◽  
Definition Of ◽  
The Cost ◽  
Turbine Design

This paper provides a brief overview of functional design theory, which is then used to examine choices in wind turbine design. Definition of function is used to examine fundamental design choices in engineering a machine to capture energy from the wind. Specifically, rationalization is presented for a coning rotor wind turbine concept, potentially able to greatly reduce the cost of wind energy. The work presented here has provided a theoretical basis in design theory to motivate the development of specialized analysis tools and more detailed analysis of the concept.

scholarly journals Determination of prioritization for maintenance of the upper structure of truss bridge

2019 ◽  
Vol 276 ◽  
pp. 01036 ◽  
Author(s):  
Heni Fitriani ◽  
M. Ade Surya Pratama ◽  
Yakni Idris ◽  
Gunawan Tanzil
Keyword(s):  
Poor Quality ◽  
Truss Bridges ◽  
Vehicle Load ◽  
Bridge Maintenance ◽  
Wide Range ◽  
Maintenance Systems ◽  
Truss Bridge ◽  
Hierarchy Process

Bridge maintenance is one of the major issues of infrastructure problems. Deterioration of a bridge’s structure will continuously increase without proper maintenance. This condition will adversely affect the service life of a bridge. Moreover, the damage will also have a direct impact on structural and functional failure of the bridge. This paper aims at identifying the damages of truss bridges and determining the most significant criteria and sub-criteria used in prioritizing bridge maintenance. Analytical Hierarchy Process (AHP) was used to assess the most important criteria that give significant weight to bridge maintenance analysis. The objects of research were nine truss bridges with a wide range of types and levels of damage. It was found that there were approximately 900 m' of components damaged at the railing of Baruga Bridge and 227 m' truss damages due to poor quality of the galvanized paint. Furthermore, based on the analysis, the most significant criteria were the level of damage (27.6%), the technical aspects (25.7%), the finance (21%), the vehicle load (13.6%) and the resources (12%). The results of this research showed important findings in determining the priority scales for bridge repair and maintenance systems.

Wudu Bridge - The Structure Stress Numerical Analysis of Triangle Frame Hanging Continuous Beam Combination Bridge

2012 ◽  
Vol 594-597 ◽  
pp. 1577-1580
Author(s):  
Shi Sheng Zhou ◽  
Wen Hua Li ◽  
Xu Dong Chen
Keyword(s):  
Numerical Analysis ◽  
Model Selection ◽  
Theoretical Basis ◽  
Design Theory ◽  
Continuous Beam ◽  
Bridge Design ◽  
Beam Combination ◽  
Scenic Spot

As the bridge design theory and the construction level improving, the requirements on bridge's appearance and coordination of the landscape around have also became higher and higher in the scenic area. In this paper, we conducted a numerical analysis on structure stress of Wudu bridge at Laibao Road, in Fang Shan district , Beijing, located in the Wu du scenic spot. And we seek to provide the necessary theoretical basis for the bridge design and model selection.

Design norms and live load development by the example of saint petersburg depot of reinforced concrete automobile road bridges

2018 ◽  
pp. 344-357
Author(s):  
Andrei Belyi ◽  
Eduard Karapetov ◽  
Ekaterina Tsygankova
Keyword(s):  
Reinforced Concrete ◽  
Statistical Analysis ◽  
Highway Bridges ◽  
Concrete Bridge ◽  
Live Load ◽  
Design Standards ◽  
Saint Petersburg ◽  
Reinforced Concrete Bridge ◽  
Standard Design ◽  
The City

Objective: To analyze and cover the statistical data concerning the development and application of live load and relevant design standards by the example of Saint Petersburg bridge constructions. Methods: A comprehensive three-stage analysis of technical documentation on the operated reinforced concrete bridge constructions of the city was applied. Historical and technical review of norms and specifications of design, since the end of the 19th century was conducted. Systematization, statistical analysis and splitting into stages and groups were carried out. Results: The article presents the development of design standards and temporary loads of reinforced concrete highway bridges. The statistics is made on the basis of the depot of Saint Petersburg bridges. The latter is characterized by the increased esthetic, and difficult technical operation features. Classification of temporary loads on structures of Saint Petersburg since 1891 was carried out. The stages of occurrence and formation of circulating load norms were analyzed. A certain feature in regulation of requirements for urban bridges was singled out. Examples of the relevant objects were given. A number of conclusions concerning the evolution of design standards were made. Practical importance: Taking into account the specifi city of the large megalopolis, management of technical condition of bridge constructions in Saint Petersburg represents an extremely responsible and difficult task. Authentic, exact and relevant data on the history of design of facilities, circulating load (both design and current) is necessary for the solution of the task in question. Statistical analysis was carried out to apply operation of reinforced concrete bridge constructions in practice as the most mass transportation facilities of the city. From a practical point of view the data in question will make it possible to provide and support the set standard (design) levels of reliability, safety and durability of bridge constructions with a sufficient share of probability.

Testing and Monitoring for a Large Scale Truss Bridge Using Long-Gauge Fiber Optic Sensors

2013 ◽  
Vol 569-570 ◽  
pp. 223-229 ◽  
Author(s):  
Chun Feng Wan ◽  
Wan Hong ◽  
Zhi Shen Wu ◽  
Tadanobu Sato
Keyword(s):  
Damage Detection ◽  
Structural Damage ◽  
Large Scale ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Structural Testing ◽  
Bragg Grating ◽  
Truss Bridges ◽  
Long Span ◽  
Truss Bridge

Fiber optic sensors become very popular for structural testing and monitoring in civil engineering nowadays, due to its advantage of high resolution and environment durability. In this paper, long-gauge fiber optic bragg grating sensors will be introduced. Structural damage detection stratagem using the micro-strain mode will be studied. Then its application to a structural testing and monitoring for a real long span truss bridge will be discussed in detail. In the testing, 23 long-gauge fiber optic bragg grating sensors were deployed on the mid span of the bridge. Testing were made under conditions either there is train on the bridge or no train on it. Corresponding dynamic characteristics were analyzed and discussed. Results of the testing show that long-gauge fiber optic sensors can work well for structural testing and also damage detection for truss bridges.

scholarly journals Structural Aspects of Railway Truss Bridges Affecting Transverse Shear Forces in Steel-Concrete Composite Decks

2015 ◽  
Vol 15 (4) ◽  
pp. 113-126
Author(s):  
Wojciech Siekierski
Keyword(s):  
Numerical Analysis ◽  
Concrete Slab ◽  
Longitudinal Shear ◽  
Horizontal Shear ◽  
Shear Forces ◽  
Expansion Joints ◽  
Truss Bridges ◽  
Slab Width ◽  
Bridge Span ◽  
Truss Bridge

Abstract At the steel-concrete interface, the horizontal shear forces that are transverse to cross beams occur due to joint action of the steel-concrete composite deck and the truss girders. Numerical analysis showed that values of the forces are big in comparison to the longitudinal shear forces. In both cases extreme force values occur near side edges of a slab. The paper studies possibilities of reduction of these shear forces by structural alterations of the following: rigidity of a concrete slab, arrangement of a wind bracing, arrangement of concrete slab expansion joints. An existing railway truss bridge span has been analysed. Numerical analysis shows that it is possible to reduce the values of shear forces transverse to cross beams. It may reach 20% near the side edges of slabs and 23% in the centre of slab width.

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