scholarly journals Fatigue Assessment of Prestressed Concrete Slab-Between-Girder Bridges

2019 ◽  
Vol 9 (11) ◽  
pp. 2312 ◽  
Author(s):  
Eva O.L. Lantsoght ◽  
Rutger Koekkoek ◽  
Cor van der Veen ◽  
Henk Sliedrecht
Keyword(s):  
The Netherlands ◽  
Prestressed Concrete ◽  
Concrete Slab ◽  
Fatigue Loading ◽  
Static Strength ◽  
Punching Shear ◽  
Membrane Action ◽  
Girder Bridges ◽  
Scale Models ◽  
Compressive Membrane Action

In the Netherlands, the assessment of existing prestressed concrete slab-between-girder bridges has revealed that the thin, transversely prestressed slabs may be critical for static and fatigue punching when evaluated using the recently introduced Eurocodes. On the other hand, compressive membrane action increases the capacity of these slabs, and it changes the failure mode from bending to punching shear. To improve the assessment of the existing prestressed slab-between-girder bridges in the Netherlands, two 1:2 scale models of an existing bridge, i.e., the Van Brienenoord Bridge, were built in the laboratory and tested monotonically, as well as under cycles of loading. The result of these experiments revealed: (1) the static strength of the decks, which showed that compressive membrane action significantly enhanced the punching capacity, and (2) the Wöhler curve of the decks, showed that the compressive membrane action remains under fatigue loading. The experimental results could then be used in the assessment of the most critical existing slab-between-girder bridges. The outcome was that the bridge had sufficient punching capacity for static and fatigue loads and, therefore, the existing slab-between-girder bridges in the Netherlands fulfilled the code requirements for static and fatigue punching.

scholarly journals Fatigue Assessment of Prestressed Concrete Slab-between-Girder Bridges

2019 ◽  
Author(s):  
Eva O.L. Lantsoght ◽  
Rutger Koekkoek ◽  
Cor van der Veen ◽  
Henk Sliedrecht
Keyword(s):  
The Netherlands ◽  
Prestressed Concrete ◽  
Concrete Slab ◽  
Fatigue Loading ◽  
Punching Shear ◽  
Membrane Action ◽  
Girder Bridges ◽  
Scale Models ◽  
Girder Bridge ◽  
Compressive Membrane Action

In the Netherlands, the assessment of existing prestressed concrete slab-between-girder bridges showed that the thin, transversely prestressed slabs may be critical for static and fatigue punching when evaluated using the recently introduced Eurocodes. On the other hand, compressive membrane action increases the capacity of these slabs and changes the failure mode from bending to punching shear. To improve the assessment of the existing prestressed slab-between-girder bridges in the Netherlands, two 1:2 scale models of an existing bridge, the Van Brienenoord Bridge, were built in the laboratory and tested monotonically as well as under cycles of loading. The result of these experiments is: 1) the static strength of the decks, showing that compressive membrane action significantly enhances the punching capacity, and 2) the Wöhler curve of the decks, showing that compressive membrane action remains under fatigue loading. The experimental results can then be used for the assessment of the most critical existing slab-between-girder bridge. The outcome is that the bridge has sufficient punching capacity for static and fatigue loads, and thus that the existing slab-between-girder bridges in the Netherlands fulfil the code requirements for static and fatigue punching.

Capacity of prestressed concrete bridge decks under fatigue loading

2021 ◽  
Author(s):  
Eva O. L. Lantsoght ◽  
Cor van der Veen ◽  
Rutger Koekkoek ◽  
Henk Sliedrecht
Keyword(s):  
Prestressed Concrete ◽  
Large Scale ◽  
Fatigue Loading ◽  
Membrane Action ◽  
Variable Amplitude ◽  
Girder Bridges ◽  
Prestressed Girders ◽  
Series Of Experiments ◽  
Prestressed Concrete Bridge ◽  
Compressive Membrane Action

<p>In The Netherlands, existing slab-between-girder bridges with prestressed girders and thin transversely prestressed concrete decks require assessment. The punching capacity was studied in a previous series of experiments, showing a higher capacity thanks to compressive membrane action in the deck. Then, concerns were raised with regard to fatigue loading. To address this, two series of large-scale experiments were carried out, varying the number of loads (single wheel print versus double wheel print), the loading sequence (constant amplitude versus variable amplitude, and different loading sequences for variable amplitude), and the distance between the prestressing ducts. An S-N curve is developed for the assessment of slab-between-girder bridges. The experiments showed that compressive membrane actions enhances the capacity of thin transversely prestressed decks subjected to fatigue loading.</p>

NONLINEAR FINITE ELEMENT ANALYSIS OF TRANSVERSELY PRESTRESSED CONCRETE DECK SLABS

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Sana Amir ◽  
Cor van der Veen ◽  
Ane de Boer
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Prestressed Concrete ◽  
Punching Shear ◽  
Membrane Action ◽  
Element Analysis ◽  
Deck Slabs ◽  
3D Solid ◽  
Compressive Membrane Action ◽  
Concrete Deck

This paper describes the modeling and analysis procedure of a 3D, solid, nonlinear finite element (FE) model of a bridge developed in the finite element analysis software package TNO DIANA to study the structural behavior in punching shear of transversely prestressed concrete deck slabs cast between flanges of long, pretensioned girders, and compressive membrane action. The numerical research was part of a broad project involving laboratory experiments carried out on a 1:2 scale model of such a bridge in Delft University of Technology. Both the experimental and numerical results showed much higher capacities than expected and this was attributed to the development of compressive membrane action in the plane of the slab. The numerical results were then compared with the experimentally found ultimate loads of eight basic test cases and it was discovered that the nonlinear FE models can predict the load carrying capacity quite accurately with a coefficient of variation of only 11%. It was concluded that punching shear failures can be reasonably modeled with non-linear finite element analysis of 3D solid models. Furthermore, using composed elements can lead to the determination of compressive membrane forces developed in a laterally restrained slab, which was previously difficult to determine using analytical techniques.

Bearing capacity of transversely prestressed concrete deck slabs

2018 ◽  
Author(s):  
Sana Amir ◽  
Cor van der Veen ◽  
Joost C. Walraven ◽  
Ane de Boer
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Bridge Decks ◽  
Punching Shear ◽  
Concrete Bridge ◽  
Membrane Action ◽  
Concrete Bridge Decks ◽  
Prestressed Concrete Bridge ◽  
Compressive Membrane Action

All over the world, the safety of old structures is a question that has become increasingly important with the passage of time. In the Netherlands, there are a large number of thin, transversely prestressed concrete bridge decks, cast in-situ between the flanges of long prestressed concrete girders. These bridges date back to the 60’s and 70’s of the last century and are found to be critical in shear when analyzed using the recently implemented EN 1992-1-1:2005 (CEN 2005). With the on-going economic recession, it is an astute approach to check if such bridges can still be used for a few more decades, provided they are safe and reliable against the modern traffic loads. The results could then be applied on a wider range of structures, especially in developing countries facing economic constraints. Therefore, a prototype bridge was selected and experimental, numerical and theoretical approach was used to investigate its bearing capacity, loaded by a single and double wheelprint loadcase. Nineteen tests on a 1:2 scale model of the bridge were carried out in the laboratory. Later the bridge was modelled as a 3D solid, 1:2 scale using the finite element software TNO DIANA 9.4.4 and several nonlinear analyses were carried out. Furthermore, a theoretical analysis, using the bearing capacity obtained from the fib Model code 2010 punching shear provisions (based on the Critical Shear Crack Theory for prestressed slabs), and the experimental and numerical ultimate capacities, showed comparable results. A coefficient of variation of 11% and 9% was obtained when the experimental and the finite element analysis punching loads were compared with the theoretical results involving compressive membrane action, respectively. This led to the conclusion that the existing transversely prestressed concrete bridge decks still have sufficient residual bearing (punching shear) capacity and considerable saving in cost can be made if compressive membrane action is considered in the analysis.

Calculation Method of Ultimate Punching Bearing Capacity of Unbonded Prestressed Concrete Slab

2015 ◽  
Vol 744-746 ◽  
pp. 378-382
Author(s):  
Zhi Liu Zhou ◽  
Feng Wang ◽  
Kang Zhao ◽  
Tao Liu ◽  
Ya Nan Zhang
Keyword(s):  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Calculation Method ◽  
Virtual Work ◽  
Plastic Material ◽  
Concrete Slab ◽  
Strength Criterion ◽  
Punching Shear ◽  
Rigid Plastic ◽  
Shear Bearing Capacity

The calculation method of punching shear bearing capacity of unbounded prestressed concrete slab is presented for the reason that traditional methods mainly depend on experiences. The concrete material is assumed as ideal rigid-plastic material. The Quasi-Coulomb Criterion is taken as the strength criterion of concrete, according to plastic limit theory, and the calculation equation of punching shear limit bearing capacity of unbounded prestressed concrete slab is derived through the establishment of virtual work equation. Comparison of the calculation results based on the presented equation with test results proves that the calculation method in this paper can not only reflect and decide various influencing factors of punching shear ultimate bearing capacity of unbonded prestressed slab, and but also the calculated results are more reasonable, accurate.

Study on Prestressed Concrete Slabs with Lightweight Aggregate

2012 ◽  
Vol 450-451 ◽  
pp. 338-342
Author(s):  
Ming Jie Mao ◽  
Qiu Ning Yang
Keyword(s):  
Shear Strength ◽  
Prestressed Concrete ◽  
Lightweight Concrete ◽  
Concrete Slab ◽  
Lightweight Aggregate ◽  
Punching Shear ◽  
Lightweight Aggregate Concrete ◽  
Concrete Slabs ◽  
Low Permeability ◽  
Aggregate Concrete

A lightweight aggregate with low permeability was employed in the concrete slab; and the strength of the slab is mainly discussed. The purpose of present study is to evaluate experimentally the punching shear strength of lightweight concrete slab, and to propose the punching shear strength equation for the slab with lightweight aggregate concrete. The applicability of the proposed equation to the both reinforced concrete and pre-stressed concrete slabs with lightweight aggregate concrete.

Compressive Membrane Action Effects on Punching Strength of Flat RC Slabs

2016 ◽  
Vol 711 ◽  
pp. 698-705 ◽  
Author(s):  
Raffaele Cantone ◽  
Beatrice Belletti ◽  
Luca Manelli ◽  
Aurelio Muttoni
Keyword(s):  
Shear Crack ◽  
Experimental Tests ◽  
Punching Shear ◽  
Crack Model ◽  
Potential Contribution ◽  
Membrane Action ◽  
Flat Slabs ◽  
Codes Of Practice ◽  
Rc Slabs ◽  
Compressive Membrane Action

The design of reinforced concrete flat slabs in practice can be governed at failure by punching shear close to concentrated loads or columns. Punching shear resistance formulations provided by codes are calibrated on the basis of experimental tests on isolated slabs supported on columns in axisymmetric conditions. Nevertheless, the behavior of flat slabs can be different than isolated specimens due to the potentially beneficial contributions of moment redistributions and compressive membrane actions. Accounting for the significance of these effects, nonlinear finite element analyses are performed with the crack model PARC_CL implemented in Abaqus. This paper aims to investigate a series of punching shear tests on slabs with and without shear reinforcement, different reinforcement ratios and loading conditions accounting for the potential contribution to the enhancement of the punching strength due to compressive membrane action (CMA). The numerical results with a multi – layered shell modeling are then post – processed adopting the failure criterion of the Critical Shear Crack Theory (CSCT). The results pointed out the significant outcomes and differences between standard specimens and actual members showing how the current codes of practice may underestimate the punching capacity.

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