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

2010 ◽  
Vol 163-167 ◽  
pp. 2369-2375 ◽  
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.

Planung und Bau von drei Freivorbaugroßbrücken im Zuge des PPP-Projektes SAAone in den Niederlanden/Design and execution of three free-cantilever construction bridges as part of the PPP-Project SAAone in the Netherlands

Bauingenieur ◽  
2017 ◽  
Vol 92 (07-08) ◽  
pp. 299-306
Author(s):  
Sven Riedel ◽  
Thomas Zedler
Keyword(s):  
The Netherlands ◽  
Cantilever Construction

Die Verbindungsachse Schiphol-Amsterdam-Almere entlang der Autobahnen A 9-A 1-A 6 stellt eine der meist befahrenen Verkehrsadern in den Niederlanden dar. Ende 2012 erhielt ein Konsortium unter Beteiligung von Hochtief den Auftrag, ein rund 23 km langes Teilstück dieser Autobahn zunächst auf bis zu zwölf Fahrspuren auszubauen, darauffolgend über 25 Jahre zu betreiben sowie über die Gesamtprojektlaufzeit zu finanzieren. Auftraggeber ist die niederländische Straßen- und Wasserwegverwaltung Rijkswaterstaat. Zum Projektumfang gehört unter anderem die Errichtung mehrerer Großbauwerke. Zu diesen zählen die im Zuge der Umgestaltung des Autobahnkreuzes Diemen errichteten Brücken über den Amsterdam-Rhein-Kanal. Nach einer Übersicht über das Gesamtprojekt werden im Beitrag die Besonderheiten und technischen Herausforderungen bei Planung und Ausführung dieser im Freivorbau errichteten Brücken vorgestellt.

Diagnostics and monitoring of the longest span extradosed bridge in Europe

2019 ◽  
Author(s):  
Mikołaj Miśkiewicz ◽  
Krzysztof Wilde
Keyword(s):  
Health Monitoring ◽  
Diagnostic Procedures ◽  
Theoretical Assumptions ◽  
Speed Up ◽  
Internal Forces ◽  
Post Tension ◽  
Cantilever Construction ◽  
Final Acceptance ◽  
Acceptance Tests

<p>The article presents complex diagnostic procedures applied for the purpose of behavior analysis of the extradosed bridge with the longest span in Europe that was built in 2018 in Poland. The system of health monitoring was used to: register internal forces in temporary supports, monitor concrete bonding, perform in situ diagnostics and operation tests. The bridge is a continuous four‐span structure with spans theoretical lengths equaling: 132.5+206.0+206.0+132.5 m. During the construction of the bridge, two technical monitoring systems were used. As a consequence of their application, it was possible to carry out works with the lowest level of risk and therefore the work schedule was accelerated. The first of systems was designed to measure forces transferred to temporary supports during cantilever construction stages. The second system was designed to measure changes of the strength of curing concrete, after it was poured at the site, which allowed to speed up the removal of the scaffoldings and post‐tension of cross section with cables. When the bridge was finished, a Structural Health Monitoring (SHM) system was installed and final acceptance tests were launched. The obtained results were used to validate theoretical assumptions done at the stage of the bridge structural design and provided insight into the complex bridge behavior.</p>

Discussion on the Measurements in Cantilever Construction with Guyed Hanging Basket

2014 ◽  
Vol 580-583 ◽  
pp. 2797-2800
Author(s):  
Fang Ru Gui
Keyword(s):  
Reinforced Concrete ◽  
Construction Process ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Beam Segment ◽  
Development Direction ◽  
Operating Space ◽  
Cantilever Construction

Guyed hanging basket is qualified with reasonable structure , great carrying ability and clear construction process, and also can provide a good operating space for beam segment construction. Applying cantilever pouring construction with guyed hanging basket should be the development direction of the construction of large-span reinforced concrete cable-stayed bridge. By taking the girder construction of the grand bridge over Beijing-Hangzhou Canal as an example, this paper introduces the measurements in cantilever construction with guyed hanging basket, aiming at providing reference for other similar projects.

Simulation of the construction of cable-stayed bridges

1998 ◽  
Vol 25 (3) ◽  
pp. 490-499 ◽  
Author(s):  
Dulcy M Abraham ◽  
Daniel W Halpin
Keyword(s):  
Computer Simulation ◽  
Simulation Modeling ◽  
Simulation Models ◽  
Interstate Highways ◽  
Simulation Techniques ◽  
Pedestrian Bridges ◽  
Cantilever Construction ◽  
Fertile Area ◽  
Computer Simulation Techniques ◽  
Cable Stayed Bridges

Cable-stayed bridges are ideal for spanning natural barriers of wide rivers, deep valleys, or ravines, and for pedestrian bridges crossing wide interstate highways. Modern construction of cable-stayed bridges makes use of the segmental balanced cantilever techniques and involves many repetitive cycles of placing the concrete segments (both cast-in-place and precast) and supporting cables. It provides a fertile area for the application of computer simulation techniques for the planning and analysis of the process, particularly for studying the interaction of resources used in the construction phase and also for assessing the productivity of the construction processes. This paper employs MicroCYCLONE, a microcomputer-based simulation program, for the modeling and simulation of the construction of two cable-stayed bridges: the Dame Point Bridge in the state of Florida, U.S.A., and the Tsukuhara Bridge in Hyuougo, Japan. The paper will also provide a brief explanation of the suspended long traveler method used on the Tsukuhara Bridge, the simulation models developed to analyze the construction processes, and the results of sensitivity analyses.Key words: simulation, modeling, construction, cable-stayed bridges, resources, productivity, balanced cantilever construction.

Influence of Construction Procedures on the Liner and Stress of a PC Continuous Beam Bridge

2010 ◽  
Vol 121-122 ◽  
pp. 162-167
Author(s):  
Hu Cheng ◽  
Guo Xuan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Test Data ◽  
Significant Influence ◽  
Continuous Beam ◽  
Element Analysis ◽  
Continuous Beam Bridge ◽  
Cantilever Construction ◽  
Beam Bridge

During the construction of a bridge, the construction procedures may change from the originally designed procedures due to some reasons like the weather. In this paper, the influence of construction procedures on the liner and stress is investigated for a prestressed continuous beam bridge with three spans. Finite element analysis indicated that construction procedures have great impact on the liner control and they affect the middle span and side span differently. Although different sets of construction procedures cause different stress at corresponding construction stages after the cantilever construction is finished, they have no significant influence on the stress of the finally built bridge. Test data agreed with finite element analysis. It is thus the influence of construction procedures on bridge liner control should not be neglected.

Seismic Performance Assessment of Long Span Continuous Rigid Bridge

2013 ◽  
Vol 353-356 ◽  
pp. 2033-2038
Author(s):  
Qi Wen Jin ◽  
Tong Ning Wang ◽  
Yi Li Sun ◽  
Zhao Tong Hu
Keyword(s):  
Pile Foundation ◽  
Plastic Hinge ◽  
Bending Moment ◽  
Internal Force ◽  
Seismic Capacity ◽  
Seismic Performance Assessment ◽  
Soil Function ◽  
Long Span ◽  
Rigid Frame ◽  
Cantilever Construction

Based on the theory of cantilever construction, combined with a three cross continuous rigid frame bridge, choosing the biggest cantilever stage, side span cross fold stages, middle span cross fold stage and complete bridge stage as the research object. Considering the pillar-soil function, making the seismic elastic-plastic response calculation. Getting the result that, during the earthquake, pillar-soil function can improve the flexible extension ability of the bridge structure so as to get better resistance seismic capacity. Internal force of the construction stage gradually reduces along the bottom pier, the middle pier and the top pier. Along the bridge, the maximum bending moment appears at the biggest cantilever stage. Horizontal to the bridge, the maximum bending moment appears at the side span cross fold stages. Plastic areas develops quickly during pier bottom and pile top, the crack is obvious; Plastic hinge first appears in the pile foundation, consuming earthquake energy through its plastic deformation so as to reduce the earthquake impact of pier. We should try to avoid plasticitys appearing in the pile foundation during the design, which will provide convenience for the follow-up maintenance.

Damages Identification in the Cantilever-based on the Parameters of the Natural Oscillations

2016 ◽  
Vol 66 (1) ◽  
pp. 44 ◽  
Author(s):  
A. V. Cherpakov ◽  
A. N. Soloviev ◽  
V. V. Gritsenko ◽  
O. U. Goncharov
Keyword(s):  
Parametric Identification ◽  
Crack Size ◽  
Crack Identification ◽  
Natural Oscillations ◽  
Crack Location ◽  
Diagnostic Signs ◽  
Cantilever Construction ◽  
Two Stages ◽  
Local Extreme

<p>An approach to parametric identification of damages such as cracks in the rod cantilever construction is described. The identification method is based on analysis of shapes of the natural oscillations. The analytic modelling is performed in the Maple software on the base of the Euler-Bernoulli hypothesis. Crack is modelled by an elastic bending element. Transverse oscillations of the rod are considered. We take into account first four eigen modes of the oscillations. Parameters of amplitude, curvature and angle of bends of the waveforms are analysed. It was established that damage location is revealed by ‘kink’ on corresponding curves of the waveforms. The parameters of oscillation shapes are sensitive to the crack parameters in different degree. The novelty of the approach consists in that the identification procedure is divided into two stages: (a) it is determined the crack location, and (b) it is determined the crack size. Based on analytical modelling, an example of determination of dependence of the crack parameters on its size in the cantilever rod is presented. Study of features of the waveforms during identification of the fracture parameters shows that the features found in the form of ‘kinks’ and local extreme a of the angle between the tangent and curvature of waveforms for different modes of bending oscillations, define the crack location in cantilever. They can serve as one of diagnostic signs of crack identification and allow us to determine its location.</p><p><strong>Defence Science Journal, Vol. 66, No. 1, January 2016, pp. 44-50, DOI: http://dx.doi.org/10.14429/dsj.66.8182</strong></p><p> </p>

Sign in / Sign up

Export Citation Format

Share Document