Bi-Directional Evolutionary Structural Optimization in Conceptual Bridge Design

2012 ◽  
Vol 256-259 ◽  
pp. 1658-1664
Author(s):  
Jian Xu ◽  
Jian Yuan Sun ◽  
Yu Long Shui
Keyword(s):  
Structural Optimization ◽  
Bridge Pier ◽  
Main Beam ◽  
Force Transmission ◽  
Bridge Design ◽  
Arch Bridge ◽  
Evolutionary Structural Optimization ◽  
Arch Bridges ◽  
Tied Arch Bridge

The principle and procedure of bi-directional evolutionary structural optimization (BESO) are stated in detail. A program based on BESO is introduced in conceptual bridge design. Topology optimizations are achieved for deck arch bridges with different rise-to-span ratios, half-through arch bridge, through tied arch bridge, bridge pier and bridge main beam. The results demonstrate rational structures with well-distributed stress and smooth force transmission, which indicates the efficient of the method.

Dynamic Response Analysis of Suspenders of Arch Bridges Sudden Failure on Failure-Safety Theory

2013 ◽  
Vol 444-445 ◽  
pp. 1295-1300 ◽  
Author(s):  
Hua Li ◽  
Rui Li ◽  
Yue Chen ◽  
De Xiang Zhu
Keyword(s):  
Dynamic Response ◽  
Yunnan Province ◽  
Three Dimensional ◽  
Response Analysis ◽  
Force Transmission ◽  
Arch Bridge ◽  
Sudden Failure ◽  
Dimensional Finite Element ◽  
Arch Bridges ◽  
Three Dimensional Finite Element

Suspenders are main force-transmission components of half-through and through arch bridge, It is crucial for safety of bridges to its reliability and durability. Safety of the arch bridge will change when a suspender sudden failure, and affect the safety of the structure. Selecting a through arch bridge in Yunnan Province as the research object, it based on the three-dimensional finite element, this paper studied the dynamic response of arch bridge suspenders sudden failure on the failure-safety theory.

scholarly journals Analysis on Construction Technology of Reinforced Concrete Tied Arch Bridge

2021 ◽  
Vol 5 (6) ◽  
pp. 67-71
Author(s):  
Zhongyu Wang
Keyword(s):  
Reinforced Concrete ◽  
Cost Savings ◽  
Construction Cost ◽  
Construction Technology ◽  
Bridge Construction ◽  
Construction Quality ◽  
Arch Bridge ◽  
Subsequent Application ◽  
Arch Bridges ◽  
Tied Arch Bridge

Bridge construction has received a lot of attention as transportation continues to improve. Reinforced concrete linked arch bridges are a common bridge style in today’s bridge construction. This type of bridge not only has a basic and generous shape, but it is also incredibly easy to construct, resulting in significant material and construction cost savings. This article analyzes the construction technology of a reinforced concrete linked arch bridge in order to achieve good construction and application. It is hoped that this analysis can provide a scientific reference for the guarantee of the construction quality and subsequent application effect of this kind of bridge.

Optimization of hanger arrangement in pedestrian tied arch bridge with sparse hanger system

2019 ◽  
Vol 22 (12) ◽  
pp. 2594-2604 ◽  
Author(s):  
Yonggang Tan ◽  
Yuanbin Yao
Keyword(s):  
Mechanical Properties ◽  
Genetic Algorithm ◽  
Numerical Analysis ◽  
Mechanical Behavior ◽  
Live Load ◽  
Optimization Approach ◽  
Dense Network ◽  
Arch Bridge ◽  
Arch Bridges ◽  
Tied Arch Bridge

The hanger arrangement has a decisive influence on the mechanical behavior of the tied arch bridge with network hanger system. Many investigations on highway or railway tied arch bridges show that the arch bridges with dense network hangers are superior to those with vertical hangers under larger live load. However, numerous dense inclined hangers lower the esthetic effect of the bridge, especially for pedestrian tied arch bridges. Consequently, the sparse inclined hanger system is recommended in the design of pedestrian tied arch bridges. However, the amount of possible schemes of the hanger arrangement grows rapidly with the number of hangers increasing beyond 10, rendering great difficulties in searching for proper schemes. In this article, a dimensionless optimization approach based on genetic algorithm is proposed in searching for hanger arrangement schemes. Numerical analysis indicates that the proposed method is effective in the optimization of pedestrian tied arch bridge with sparse inclined hanger system, and some of the feasible hanger arrangement solutions show more excellent mechanical properties.

scholarly journals Structural Optimization of Network Arch Bridges with Hollow Tubular Arches and Chords

2018 ◽  
Vol 12 (2) ◽  
pp. 36
Author(s):  
Alessio Pipinato
Keyword(s):  
Structural Analysis ◽  
Structural Optimization ◽  
Bridge Engineering ◽  
Structural Safety ◽  
Arch Bridge ◽  
Railway Bridges ◽  
Cable Structure ◽  
Arch Bridges ◽  
High Level

In the framework of bridge engineering, cable structure represent a key argument. The development of innovative bridge solutions are needed in order to keep time and costs at a reasonable level, maintaining at the same time an high level of structural safety and functionality. The network arch bridge solution completely respond to these requirements, and in addition could be designed as a very pleasant and formally elegant structure, because of its slenderness and lightness. In this paper, an introduction on the network arch solution is presented, together with structural analysis and data of relevant structures realized. Furthermore, an optimization of specific types of road and railway bridges is presented in the particular case of hollow sections, considering three alternative of cable disposition.

scholarly journals Cross section and geometry optimization of steel truss arch bridges based on internal forces

2019 ◽  
Vol 258 ◽  
pp. 02002
Author(s):  
Malik Mushthofa ◽  
Akhmad Aminullah ◽  
Muslikh
Keyword(s):  
Cross Section ◽  
Axial Force ◽  
Geometric Design ◽  
Bridge Design ◽  
Arch Bridge ◽  
Ratio Data ◽  
Steel Truss ◽  
China And Japan ◽  
Arch Bridges ◽  
Steel Section

The purpose of this study is to obtain the optimum geometric design and cross section member element of steel arch bridges. It is necessary because the geometric design of the steel truss arch bridges have the direct impact to the steel section used in the structures. Therefore, steel section have the impact to the economic value of the bridge design due to the structure weight. There are many important variables have to considered in the bridge design. Rise to span ratio variable is the major variable in the arch bridge geometric design. Arch bridge structures rely on the axial force capacity of the main arch, whereas shear forces and bending moments as secondary consideration. The optimization process is done by collecting the axial force, shear force and bending moment data of each steel arch bridge numeric model, and scaling its value from 0 to 1 to compare the data of every span in the same field, in order to achieve the optimum rise to span ratio. Rise to span ratio data of steel arch bridges in China and Japan used as the comparison with the result of this study, due to their brief history and rich experiences on arch bridge engineering innovation, and also have the large of amount of steel arch bridges. The results of this study give the optimum value of rise to span ratio between 1/4 to 1/7. It has good correlation with the rise to span ratio data of steel arch bridges in China and Japan i.e. 1/4 - 1/6 and 1/5 - 1/7 respectively.

The modernisation of the Albert Canal and its bridges

2021 ◽  
Author(s):  
Alain Dumortier ◽  
Vincent de Ville de Goyet
Keyword(s):  
Arch Bridge ◽  
General Overview ◽  
Good For ◽  
Arch Bridges ◽  
In The Beginning ◽  
Tied Arch Bridge

<p>The 130 km long Albert canal linking Liège with Antwerp in Belgium was built in the years 1930. The growing size of the inland vessels led to the start of a modernisation of the canal. The widening began in the years 1970. Since the years 1980, most of the bridges are being jacked up, or replaced. In the beginning, each new bridge was separately designed, which led to a variety of bridge types and forms. To accelerate the replacement of the bridges, a generic tied-arch bridge has been designed, good for one third of the total number of bridges. This article presents the general overview of the works on the bridges due to the widening of the canal, and the focusses specific on the design of tied-arch bridges, with a special attention of this generic bridge.</p>

Approximate analysis and optimization of stiffened tied arch bridges

1985 ◽  
Vol 12 (2) ◽  
pp. 307-315
Author(s):  
D. K. McNeely ◽  
J. S. Sneep ◽  
K. N. Smith
Keyword(s):  
Key Words ◽  
Stiffness Ratio ◽  
Approximate Analysis ◽  
Approximate Methods ◽  
Arch Bridge ◽  
Optimization Study ◽  
Flexural Member ◽  
Live Loads ◽  
Arch Bridges ◽  
Tied Arch Bridge

The stiffened tied arch bridge has a tie consisting of a stiff flexural member, which tends to distribute live loads uniformly over the arch. Various approximate methods for analyzing this system are presented, including Maillart's method, a simplification of that procedure, the single-redundancy method, and an elastic foundation approach. Comparisons are made with a computer analysis to determine the accuracy of each procedure. Increased familiarity with this structure should lead to more frequent consideration of this type of bridge by designers.An optimization study was carried out for spans in the range of 50–150 m. This investigation indicated that a girder-to-arch stiffness ratio of about 9 is desirable. Key words: analysis, arch, bridge, optimization, stiffened, structure, tie.

VIBRATION OF PARABOLIC TIED-ARCH BEAMS DUE TO MOVING LOADS

2006 ◽  
Vol 06 (02) ◽  
pp. 193-214 ◽  
Author(s):  
JONG-DAR YAU
Keyword(s):  
Equations Of Motion ◽  
Transformation Method ◽  
Main Beam ◽  
Moving Loads ◽  
Critical Position ◽  
Maximum Acceleration ◽  
Arch Bridge ◽  
Closed Form Solutions ◽  
Coupled Equations ◽  
Tied Arch Bridge

This paper intends to study the train-induced vibration of a parabolic tied-arch bridge using an analytical approach. The train loads over the bridge are regarded as a sequence of equidistant moving loads with identical weights. The tied-arch bridge considered is modeled as the combination of a parabolic flat-rise arch with two-hinged supports and a simple beam suspended by densely distributed vertical cables connected to the arch rib. Using the normal coordinate transformation method, the coupled equations of motion of the arch rib and suspended beam are converted into a set of uncoupled equations. Then, one can derive closed form solutions for the response of the tied-arch beam to successive moving loads, by which the resonant conditions of higher modes of the suspended beam can be identified. According to the present study, the critical position for the maximum acceleration on the suspended beam depends upon the vibration shape that has been excited. Moreover, the numerical results indicate that the lower the rise of the arch rib, the larger the acceleration response of the main beam suspended by the arch.

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