Applicability of the suggested procedure in the analysis of actual bridge decks is investigated using staad. Bridge deck loading and analysis courses ice training. So why would the most expensive deck be a standard for the german railroads. As a result of its function, the deck will be continuous along the bridge. Though finite element method gives lesser values for bending moment in deck as compared to grillage analysis, the later method seems to be easy.
Behavior of concrete bridge decks on steel beams verification of the ontario bridge. There is existing wbeam guide railing on west bridge approach and box beam guide railing on the east bridge approach. In addition, with a reduced construction period, blocking of. If you need to print pages from this book, we recommend downloading it as a pdf. A typical example is the grillage analysis of a simply supported bridge deck. It provides bridge designers with the knowledge to understand the behaviour of bridge decks, to be familiar with, and to understand the various numerical modelling techniques, to know which technique is most suited. Chandrashekhara and antonio nanni, structural performance of a frp bridge deck, asce journal of composites for construction, march 2001. Grillage analogy in bridge deck analysis in sap 2000 bridge. The object of the paper is the study of the representativity of the grillage models with which different types of bridge decks are schematized.
Key words bridge deck, concrete cracking, field inspections, longterm performance, bridge deck deterioration modeling, deck performance database 18. The procedure and recommendations for idealising the actual. In this method the deck is represented by an equivalent grillage of beams. This prestressing combined with the self weight of the segment will keep the segment in place through shear friction, that is the friction caused by the axial compression along the bridge. Pdf analysis of integral abutment bridge by grillage method. Grillage analogy analysis general this analysis approach requires the structure to be modeled as a threedimensional grid of beam elements in which the superstructure is comprised of both longitudinal and transverse beams located at the vertical center of gravity of the superstructure.
Jul 07, 20 this book deals with the well established computeraided method of grillage analogy as applied to analysis of bridge decks. The bridge deck is analyzed by both grillage analogy as well as by finite element method. Abstract ihe orthotropic plate method of bridge deck andysis is based on a series solution. The idealization of a bridge by a grillage is not axiomatic and is not without pitfalls.
The bridge deck has been designed as prestressed posttensioned concrete by cantilever method. For the purposes of a comparison a simply supported single span beam and slab bridge deck was analysed under a uniformly distributed load and one lane of m1600 loading. The sandwich deck panel is analogous to an ibeam subjected to flexure, where the steel plates. Evaluation of the empirical deck design for vehicular bridges.
Analysis of composite bridge superstructures using modified. Concrete bridge deck performance the national academies press. Grillage analogy in bridge deck analysis in sap 2000. The method, applicable to various types of bridge decks such as slab bridges, tbeam bridges and boxgirder bridges, can handle rigid or flexible support conditions, and right, skew or curved plan layouts. Aug 09, 2005 the definitive text in the field of bridge deck behaviour and analysis bridge deck analysis is an essential reference for civil and structural engineers. Rettner, primary author american engineering testing, inc. When a bridge deck is analyzed by the method of grillage analogy, there are essentially five steps to be followed for obtaining design responses.
As measured from the top level of foundations, the pier heights are 60. Temperature behavior and stability analysis of orthotropic. Basically, grillage analogy method uses stiffness approach for analyzing the bridge decks jaggerwal and bajpai, 2014. Grillage analogy applications in analysis of bridge decks. This document is intended as a design manual for the application of grillage analogy method for the bridge deck analysis. This one day classroom course covers bridge deck loading including the various types of loads. The grillage analogy method idealizes the bridge structure using an. In ga, the bridge superstructure is modelled by equivalent longitudinal and transverse beams, while fe analysis discretizes the deck into different elements. February 2014 research project final report 201409.
The bridge load evaluation manual manual is a documentation of alberta transportations bridge load evaluation guidelines, practices and policies and is intended to. Though finite element method gives lesser values for bending moment in deck as compared to grillage analysis, the later method seems to be easy to. Grillage analogy in bridge deck analysis in sap 2000 shz7 structural 28 aug 15 03. An experimental study on lifting of bridge deck without. The book presents the theory and applications of the analytical techniques used in finding stresses in highway and other bridge decks.
Analysis of composite bridge superstructures using. The analysis results showed that the new technique reduced the construction period by 30% since no core drilling was required and consequently, reduced construction cost. Most bridge decks are generally 5 orthotropic due to geometric shape rather than material differences in two orthogonal directions. Unfortunately, this book cant be printed from the openbook. Comparative study of grillage method and finite element. How to carry out bridge deck grillage analysis using staad. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Bridges, tbeam bridge decks, skew angle, span length, grillage analogy method, grid size class a vehicle. Design parameters this bridge deck was designed to aashto specifications for a 9. The object of the paper is the deck of a railway bridge. The principal function of a bridge deck is to provide support to local vertical loads from highway traffic, railway or pedestrians and transmit these loads to the primary superstructure of the bridge, figure 11. Cracking of the concrete decks on newly constructed bridges in minnesota has become a. Because of the fact that the bridge system is statically indeterminate and the cantilever length is much long, the minimum and maximum bending moments are obtained in the middle of the bridge deck and on the bridge column, respectively 3.
Pdf bridge deck analysis through the use of grillage. At this stage, prestressing only from top of the deck will suffice. The structural analysis of the classic constructive. Jan 15, 2001 grillage analogy in bridge deck analysis by c. Analysis of composite bridge superstructures using modified grillage method 943 orthotropy. The grillage analogy in bridge analysis researchgate. Surana, 9788173191534, available at book depository with free delivery worldwide. Hambly, bridge deck behaviour, chapman and hall, 1976, first edition e. Influence of soilstructure interaction on structural behavior of integral bridge piers. Mar 19, 2014 click on a datetime to view the file as it appeared at that time. Based on hambly and surana grillage analogy in bridge deck analysis for interpretation of cellular deck grillage output, they said the longitudinal moments for true bending design should be average of moments at each side of joints. The definitive text in the field of bridge deck behaviour and analysis bridge deck analysis is an essential reference for civil and structural engineers. Click on a datetime to view the file as it appeared at that time.
The finer grillage mesh, provide more accurate results. Idealization of physical deck into equivalent grillage evaluation of equivalent elastic inertia of members of grillage application and transfer of loads to various nodes of grillage determination of. Analysis and design of bridge deck using grillage method is considered. The bridge consisted of 5 type 4 super t beams of 30 metres length, giving a deck width of 12. An orthotropic deck may be the most expensive deck system per square meter in a shortspan bridge. Distribution of girder loads in a composite highway bridge. Grillage analogy in bridge deck analysis 9788173191534 by surana, c. This book deals with the well established computeraided method of grillage analogy as applied to analysis of bridge decks. The theoretical principles has been expounded in the book of edmund c. The grillage analogy method for analyzing bridge superstructures has been in use for quite some time. Grillage analogy in bridge deck analysis jlk969d69545. Bridge deck analysis describes the grillage analogy in detail reflecting, among other things, the shift in emphasis away from computer limitations. First, the theoretical principles on which this kind of modelling is based are recalled.
For a typical load case, the total load applied to the grillage model is known. A very thin deck structure can be built using this structural system, as shown by the creitz road grade separation in figure 14. For the purpose of analysis, dead load self weight, wearing coat, super imposed dead load, footpath live load and vehicular live loads are considered as per irc. Also, the replacement bridge will utilize curbless details allowing runoff from the bridge to pass directly into the wappinger creek. The support reactions should then be summed together for that load case. The purpose of this investigation was to evaluate the use of the commercial finite element code abaqus for the analysis of reinforced concrete bridge decks and.
Jan 01, 2018 last, a submodel and eigenbuckling analysis method was used to evaluate the stability of the u ribs during the gac paving. More rarely, however, there exists a combination of material and geometric orthotropy. Reliability and accuracy of the grillage analogy ga technique, as a commonly used modelling approach, in structural analyses of bridge. Current trends in bridge design and construction are discussed and are followed by the various analytical methods. Click and collect from your local waterstones or get free uk delivery on orders over. Introduction generally, grillage analysis 8 is the most common method used in bridge analysis. Key words steel bridge, deck design, concrete deck, precast concrete deck, wood deck, metal grid deck, orthotropic. Several studies used finite element analysis to model the conditions and predict cracking. Pdf bridge deck analysis through the use of grillage models. For the deck types discussed herein, a brief description of the particular deck type is given, in addition to general design and detail considerations. Evaluation of torsional stiffness in beam and slab bridge decks. Last, a submodel and eigenbuckling analysis method was used to evaluate the stability of the u ribs during the gac paving.
The structural model is developed as per fe discretization in staad pro. The existing steel thrugirders extend above the bridge deck surface. Grillage analogy in bridge deck analysis surana, c. Easily share your publications and get them in front of issuus. Coletti has designed a wide variety of bridges in steel and concrete for highway, rail and pedestrian applications. Download a pdf of concrete bridge deck performance by the national. Using analogy in equations 6 and 7 it can be seen that in mc 90.
The results show that uplift and expanded deformation occur in the steel bridge deck during the gac paving, and this deformation could cause a nonuniform thickness distribution of pavement. The upstand grillage analogy is given particular coverage, and the authors provide practical guidance on its application to common types of bridge deck. The structural analysis of the classic constructive solution. Beam and slab bridge deck, torsional stiffness, sls. Bridge deck analysis by grillage method is also compared for normal meshing, coarse meshing and fine meshing. Bridge deck analysis by grillage method is also compared for normal. Bridge deck design fhwa us department of transportation. The sandwich deck panel is analogous to an ibeam subjected to flexure, where the. Bridge deck analysis transportation research board. Based on hambly and surana grillage analogy in bridge deck analysisfor interpretation of cellular deck grillage output, they said the longitudinal moments for true bending design should be average of moments at each side of joints. Grillage analogy in bridge deck analysis free ebook download as pdf file. Grillage analogy in bridge deck analysis civil engineering. Nondestructive testing to identify concrete bridge deck.
1553 66 337 233 1543 631 1071 742 73 337 1439 459 707 544 1078 80 1489 369 1493 112 936 550 171 747 1003 1031 917 1225 576 1432 669 453 1160 736 409 413 765 324 999 940 1380 781