Marineda Footbridge in A Coruña (Spain)

Designed with smooth and slender forms, Marineda footbridge in A Coruña (Spain) is a composite structure for pedestrians and cyclists that solves the access to one of the largest shopping centers in Spain, flying above a high-traffic highway.The maximum deck height and the geometry in plan were established by the necessary vertical clearance over the highway and the situation of the starting and end points. In this way, and with the idea of avoiding structural elements over the deck to minimize visual impact, a three-span curved slender beam was designed. The main span is 85.8 meters long and comprises a composite airtight box-girder deck with variable depth from 1.75 meters near piers to 1.00 meter in midspan section. The two lateral spans, one on each side, are formed by a post-tensioned voided slab rigidly connected to pier and abutment, and with a strut element underground forming a rigid frame. In these spans the maximum deck height is 1.90 meters and the minimum is 1.00 meter. The deck width is 4.00 meters to accommodate both cyclists and pedestrians and has a transverse slope of 1.5% from the centerline to each side.The curved geometry in plan, with a radius of 55 meters, and the stiffness of the lateral spans allow for an integral structure design without joints, that, along with the slenderness of the main span, give an unique appearance to the footbridge.

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Multilayered composite structure design optimisation using distributed/parallel multi-objective evolutionary algorithms

Composite Structures ◽

10.1016/j.compstruct.2011.10.009 ◽

2012 ◽

Vol 94 (3) ◽

pp. 1087-1096 ◽

Cited By ~ 30

Author(s):

D.S. Lee ◽

C. Morillo ◽

G. Bugeda ◽

S. Oller ◽

E. Onate

Keyword(s):

Evolutionary Algorithms ◽

Composite Structure ◽

Structure Design ◽

Design Optimisation ◽

Multi Objective ◽

Multilayered Composite

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A Convenient Approach to Tuning the Local Piezopotential of an Extensional Piezoelectric Semiconductor Fiber via Composite Structure Design

Nano Energy ◽

10.1016/j.nanoen.2021.106626 ◽

2021 ◽

pp. 106626

Author(s):

Kai Fang ◽

Nian Li ◽

Peng Li ◽

Zhenghua Qian ◽

Vladimir Kolesov ◽

...

Keyword(s):

Composite Structure ◽

Structure Design ◽

Piezoelectric Semiconductor ◽

Convenient Approach

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Use of curvilinear fiber format in composite structure design

AIAA Journal ◽

10.2514/3.10697 ◽

1991 ◽

Vol 29 (6) ◽

pp. 1011-1015 ◽

Cited By ~ 147

Author(s):

M. W. Hyer ◽

R. F. Charette

Keyword(s):

Composite Structure ◽

Structure Design

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Analysis of Non-Uniform Shrinkage Effect in Box Girder Sections for Long-Span Continuous Rigid Frame Bridge

The Baltic Journal of Road and Bridge Engineering ◽

10.7250/bjrbe.2018-13.409 ◽

2018 ◽

Vol 13 (2) ◽

pp. 146-155 ◽

Cited By ~ 1

Author(s):

Zhuoya Yuan ◽

Pui-Lam Ng ◽

Darius Bačinskas ◽

Jinsheng Du

Keyword(s):

Finite Element ◽

General Purpose ◽

Element Analysis ◽

Box Girder ◽

Finite Element Program ◽

Continuous Rigid Frame Bridge ◽

Rigid Frame ◽

Shrinkage Effect ◽

Rigid Frame Bridge

To consider the effect of non-uniform shrinkage of box girder sections on the long-term deformations of continuous rigid frame bridges, and to improve the prediction accuracy of analysis in the design phase, this paper proposes a new simulation technique for use with general-purpose finite element program. The non-uniform shrinkage effect of the box girder is transformed to an equivalent temperature gradient and then applied as external load onto the beam elements in the finite element analysis. Comparative analysis of the difference in deflections between uniform shrinkage and nonuniform shrinkage of the main girder was made for a vehicular bridge in reality using the proposed technique. The results indicate that the maximum deflection of box girder under the action of non-uniform shrinkage is much greater than that under the action of uniform shrinkage. The maximum downward deflection of the bridge girder caused by uniform shrinkage is 5.6 mm at 20 years after completion of bridge deck construction, whereas the maximum downward deflection caused by non-uniform shrinkage is 21.6 mm, which is 3.8 times larger. This study shows that the non-uniform shrinkage effect of the girder sections has a significant impact on the long-term deflection of continuous rigid frame bridge, and it can be accurately simulated by the proposed transformation technique.

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Optimization on Closure Scheme of Multi-Span Prestressed Concrete Box-Girder Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.2369 ◽

2010 ◽

Vol 163-167 ◽

pp. 2369-2375 ◽

Cited By ~ 1

Author(s):

Ming Yuan ◽

Dong Huang Yan

Keyword(s):

Stress State ◽

Prestressed Concrete ◽

Box Girder ◽

Rigid Frame ◽

Closure Scheme ◽

Concrete Box Girder ◽

Box Girder Bridge ◽

Girder Bridge ◽

Cantilever Construction ◽

Rigid Frame Bridge

The stress state of finished bridge and service stage is influenced by various closure schemes in cantilever construction of multi-span prestressed concrete box-girder bridge. Two typical bridges—multi-span prestressed concrete continuous rigid frame bridge and girder bridge are investigated, The stress state in different closure schemes are analyzed using finite element(FE) analysis. Meanwhile, compared the healthy monitoring data, it has been found that taking the closure sequence from side span to middle span in cantilever construction of multi-span prestressed concrete box-girder bridge can lower stress of girder and pier in finished bridge stage, as well as reducing deformation of girder in service stage. Hence, the closure sequence from side span to middle span is more suitable for cantilever construction of multi-span prestressed concrete box-girder bridge.

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Research on Extending Span of Box Girder Bridge with Corrugated Steel Webs up to 300m

IABSE Congress, New York, New York 2019: The Evolving Metropolis ◽

10.2749/newyork.2019.1874 ◽

2019 ◽

Author(s):

Dong Xu ◽

Xiangyong Duanmu ◽

Yafan Zhou

Keyword(s):

Limit State ◽

Ultimate Limit State ◽

Beam Model ◽

Box Girder ◽

Single Beam ◽

Stability Performance ◽

Rigid Frame ◽

Box Girder Bridge ◽

Girder Bridge ◽

Under Construction

In order to promote the application of steel-concrete composite structure in mountainous areas in China, a conceptual design for a PC continuous rigid frame box-girder bridge with corrugated steel webs and main span of 300 m was performed in the present paper. The combined corrugated steel web was proposed to increase the compressive area and improve the stability performance; thus, the self-weight of the composite box-girder bridge is significantly reduced. Flexural capacity of the whole section had been calculated with a single-beam model for the ultimate limit state (ULS). For the service limit state (SLS) design, the calculation for the composite box-girder bridge was conducted with the spatial grid model (SGM), from which 27 complete checking stresses in three layers (i.e. outside, inside and middle planes) of concrete plates and steel webs in every cross-section could be obtained. The stress history under construction stage was incorporated into the results obtained by SGM. Moreover, the stress states and stability performance for the composite box-girder bridge constructed were evaluated. The present investigation can provide references for the design and construction of the composite box-girder bridge with corrugated steel webs for long spans.

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Machine learning-combined topology optimization for functionary graded composite structure design

Computer Methods in Applied Mechanics and Engineering ◽

10.1016/j.cma.2021.114158 ◽

2021 ◽

Vol 387 ◽

pp. 114158

Author(s):

Cheolwoong Kim ◽

Jaewook Lee ◽

Jeonghoon Yoo

Keyword(s):

Machine Learning ◽

Topology Optimization ◽

Composite Structure ◽

Structure Design

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Strengthening and Retrofitting of Motín de Oro II Bridge in Mexico

Case Studies on Conservation and Seismic Strengthening/Retrofitting of Existing Structures ◽

10.2749/cs002.193 ◽

2020 ◽

pp. 193-209

Author(s):

Jose M. Jara ◽

Bertha A. Olmos ◽

Guillermo Martínez

Keyword(s):

Material Properties ◽

River Flow ◽

Dynamic Properties ◽

Flow Characteristics ◽

Ambient Vibration ◽

Structural Elements ◽

Box Girder ◽

Prone Area ◽

Scour Protection ◽

Ambient Vibration Measurements

This chapter presents the studies conducted to retrofit an existing bridge in a seismic prone area of Mexico. The Motín de Oro II Bridge was built in the 1970s with a continuous box girder superstructure and wall-type substructure. From the 1970s to nowadays, the design truck loads in Mexico have been substantially incremented and many bridges built in that period have required to be evaluated and, in some cases, rehabilitated and retrofitted. Firstly, the study presents the results of visual inspections of all parts of the bridge and a description of the preliminary studies conducted to determine the material properties, to evaluate the river flow characteristics and to calculate the scour depth. Secondly, the chapter discusses the initial structural analyses of the bridge subjected to the original gravitational and seismic loads and to the current loads before the intervention. These analyses allow to select the structural elements that require to be retrofitted and the best strategy to follow. Finally, the study presents results of the numerical retrofitted model and the experimental assessment of the dynamic properties based on ambient vibration measurements. Additionally, the scour protection and the general construction procedure are also described.

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