Structural Type Selection for Long-Span Bridges in Mountain Area

2012 ◽  
Vol 256-259 ◽  
pp. 1596-1600
Author(s):  
Dong Liang ◽  
Chang Rong Yao ◽  
Sai Zhi Liu
Keyword(s):  
Conceptual Design ◽  
Structural Type ◽  
Mountainous Area ◽  
Construction Technology ◽  
Mountain Area ◽  
Long Span Bridges ◽  
Long Span ◽  
Type Selection ◽  
Geological Conditions ◽  
Bridge Structures

As the western region is a mountainous area with geology complicated geological conditions, the proportion of bridges and tunnels is bigger. Based on the characteristic of mountainous route and long-span bridges, this paper discussed the conceptual design of mountainous bridges. Firstly, this paper analyzes the characteristic of mountainous long-span bridges and proposed some fundamental principles to design long-span bridges. After the comparison of the main bridge structures, the paper points out that the designer should select the best programs considering hydrological, geological, geomorphology, construction technology, transportation , geographical environment and social environment. The purpose of this paper is to give reference for the conceptual design of mountainous long-span bridges.

scholarly journals Concepts and new perspectives for long span bridges

2016 ◽  
Vol 5 (1) ◽  
pp. 75-97
Author(s):  
Fabio Brancaleoni
Keyword(s):  
Conceptual Design ◽  
Present State ◽  
Critical Parameter ◽  
State Of The Art ◽  
Span Length ◽  
Factors Affecting ◽  
Long Span Bridges ◽  
Future Developments ◽  
Long Span ◽  
The Subject

AbstractA discussion of the dominant factors affecting the behaviour of long span cable supported bridges is the subject of this paper. The main issue is the evolution of properties and response of the bridge with the size of the structure, represented by the critical parameter of span length, showing how this affects the conceptual design. After a review of the present state of the art, perspectives for future developments are discussed.

Large Bridges Recently Built in Poland

2018 ◽  
Author(s):  
Robert Toczkiewicz ◽  
Jan Biliszczuk ◽  
Marco Teichgraeber
Keyword(s):  
Construction Technology ◽  
Structural Configuration ◽  
Arch Bridge ◽  
Long Span Bridges ◽  
The Road ◽  
Long Span ◽  
Railway Infrastructure ◽  
Cable Stayed Bridges

<p>The road and railway infrastructure in Poland has been intensively developed and modernized for the last years. Around 300 new bridges are built annually. Among the new structures there is a group of modern long span bridges.</p> <p>This paper presents examples of selected, most interesting large road bridges built in recent years in Poland. The following structures are described:</p><ul><li> <p>two largest extradosed bridges in Europe – with spans exceeding 200 m;</p></li><li> <p>the largest arch bridge in Poland with 270 m long fixed arches and an expressway bridge with 200 m long arch span;</p></li><li> <p>two cable-stayed bridges.</p> <p>Structural configuration and construction technology of the above mentioned bridges are described.</p>

Simulation of Vortex-Induced Vibration of Long-Span Bridges: A Nonlinear Normal Mode Approach

2018 ◽  
Vol 18 (11) ◽  
pp. 1850136 ◽  
Author(s):  
Kun Xu ◽  
Yaojun Ge ◽  
Lin Zhao ◽  
Xiuli Du
Keyword(s):  
Normal Mode ◽  
Structural Equation ◽  
Closed Form Expression ◽  
Combination Strategy ◽  
Vortex Induced Vibration ◽  
Long Span Bridges ◽  
Long Span ◽  
Bridge Structures ◽  
Finite Element Procedure ◽  
Nonlinear Normal

Due to the lack of analytic technique for simulating the vortex-induced vibration (VIV) of long-span bridges, a combination of the VIV semi-empirical model with the structural equation of motion is widely employed to calculate the responses of bridge structures. However, the applicability of this method has seldom been investigated before. In this study, the theoretical defects of the conventional combination strategy (i.e. the finite element procedure or the linear normal mode procedure, LNM) are first discussed, a more theoretically reliable approach (the nonlinear norm mode approach, NNM) is then proposed, and the closed-form expression for the NNM of the VIV system is derived. The accuracy of the proposed method is further illustrated by two case studies. This new approach offers a theoretically reliable tool for analyzing the VIV of long-span bridges. It can also be applied to the process of VIV fatigue analysis or control strategy optimization.

scholarly journals Subsection construction technology of rectangular concrete independent column with super high cross section

2021 ◽  
Vol 293 ◽  
pp. 02004
Author(s):  
Guangjun Li ◽  
Tianfang Mo ◽  
Ningbo Xu ◽  
Weixiong Zhang ◽  
Hanwen Lu ◽  
...  
Keyword(s):  
Implementation Process ◽  
Steel Structures ◽  
Phase Iii ◽  
Utilization Rate ◽  
Construction Technology ◽  
Engineering Technology ◽  
Research And Practice ◽  
Long Span Bridges ◽  
Long Span ◽  
Independent Column

With the progress of engineering technology, the ability of design and construction has been significantly improved, which the number of long-span construction and long-span Bridges and long-span steel structures are increasing more and more. As the main supporting members of Bridges and steel structures, the quality assurance of rectangular reinforced concrete independent columns is particularly important. In the implementation process of No.18 Maintenance Hangar Project of GAMECO Aircraft Maintenance Facility Phase III in Guangzhou Baiyun International Airport of China Southern Airlines, through research and practice, our company applied the subsection construction technology of super high section rectangular concrete independent columns, which can not only guarantee the quality and forming effect of the column body, but also reduce the input of formwork materials. Improve the utilization rate of formwork and scaffold effectively, and then reduce the input of turnover materials, and achieve remarkable results.

Optimization-driven Conceptual Design of Long Span Bridges

2018 ◽  
Author(s):  
Helen Fairclough ◽  
Matthew Gilbert ◽  
Andrew Tyas ◽  
Aleksey Pichugin
Keyword(s):  
Conceptual Design ◽  
Long Span Bridges ◽  
Long Span

Empirical Mode Decomposition Application for Structural Seismic Responses

2012 ◽  
Vol 256-259 ◽  
pp. 2096-2101 ◽  
Author(s):  
Ri Dong Du ◽  
Yong Bo Yuan ◽  
Miao Chen
Keyword(s):  
Empirical Mode Decomposition ◽  
Large Mass ◽  
Displacement Curve ◽  
Seismic Responses ◽  
Long Span Bridges ◽  
Long Span ◽  
Long Span Bridge ◽  
Mode Decomposition ◽  
Geological Conditions ◽  
Large Mass Method

Large mass method is used to calculate structural seismic responses of long-span bridges. Due to the inherent characteristics of large mass method, the larger scale of long span bridge, different geological conditions, seismic input time delay of different foot stall, the displacement curve of seismic responses will be drifted and distorted from the normal. In this paper, Empirical Mode Decomposition（EMD) based on the large mass method is proposed to remove pseudo component and drift displacement. Then displacement response curve is reconstructed using the remaining components, the drift and distortion of structural seismic responses is successfully removed by this method.

scholarly journals NUMERICAL SIMULATION OF AERODYNAMIC STABILITY OF LONG-SPAN BRIDGES

2021 ◽  
pp. 106-114
Author(s):  
A. V. Kozlov ◽  
V. S. Safronov
Keyword(s):  
Software Systems ◽  
Wind Flow ◽  
Aerodynamic Stability ◽  
Volga River ◽  
Disturbing Force ◽  
Long Span Bridges ◽  
Long Span ◽  
Bridge Structures ◽  
Bridge Spans ◽  
The City

Statement of the problem. The aim of the work is to simulate the resonant vibrations of the continuous beam span of the bridge in the direction perpendicular to the wind flow by the finite element method. The article deals with a non-standard situation that arose on May 20, 2010 on the bridge over the Volga River in the city of Volgograd.Results. As a result, an effective algorithm for calculating the aerodynamic stability of large-span bridge structures was developed using one of the most widespread software systems in Russia and neighboring countries - "Lira-SAPR". Recommendations for the selection and modeling of dampers are given. Conclusions. The developed algorithm makes it possible to numerically describe the disturbing force of periodic breakdown of wind flow vortices, which causes resonant oscillations of bridge spans, to apply this force to the design model in Lira-SAPR, and to obtain parameters that make it possible to assess the stress-strain state of the system during oscillations and to select the optimal characteristics of the damping devices.

Alternate Designs for Long Span Bridges

PCI Journal ◽  
1980 ◽  
Vol 25 (4) ◽  
pp. 48-58
Author(s):  
Felix Kulka
Keyword(s):  
Long Span Bridges ◽  
Long Span
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