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Experimental Load Rating Of Skewed Steel Girder Highway Bridges
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Book Synopsis Experimental Load Rating of Skewed Steel Girder Highway Bridges by : Renxiang Lu
Download or read book Experimental Load Rating of Skewed Steel Girder Highway Bridges written by Renxiang Lu and published by . This book was released on 2020 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Skewed highway bridges are commonplace, but the behavior of a skewed bridge can be significantly more complex compared to a straight bridge. As a consequence, the theoretical equations currently used to determine the load rating of a skewed bridge can be inaccurate for a large skew angle because the location of the girder and the moment (positive or negative) under consideration, the arrangement and position of cross-frames and parapets, and the location of loading applied on the bridge are neglected. In this study, an accurate load rating method is proposed that accounts for these effects. In the proposed method, a field test is used to determine the safe load-carrying capacity of the bridge, and a two-dimensional grid with longitudinal and transverse beam elements rigidly connected at intersecting nodes and vertical loads applied at the nodes (“grillage”) model is used to calculate the contribution due to skew. The field test is conducted using a calibrated truck driven over the bridge in successive runs that traverse the entire width of the roadway, and the measured strain response is used to calculate internal moments and experimental live load effects. To compare the behaviors between the actual bridge and the analytical estimation, the ratio of the bridge experimental and analytical load ratings is obtained. Additionally, contributors to the bridge live load are decomposed and compared to the analytical load rating to obtain the bridge deaggregated ratio of load ratings. The effect of critical span adjustment, longitudinal and lateral load distribution, unintended composite action between the slab and the girders, slab flexure, and additional stiffness in the system on the ratio of load ratings are qualified and quantified. The contribution of additional stiffness in the system to the actual load rating in comparison to the analytical is further discretized into the contribution to stiffness due to skew and the contribution to stiffness due to curbs and railings. The contribution to stiffness due to skew is calculated as the ratio of the statical moment in the skewed bridge grillage model to the corresponding statical moment in the equivalent straight bridge. The proposed method is illustrated using a case study of a steel girder highway bridge with a 43-degree skew angle. The tests indicate that the experimental load rating is 156% greater than the analytical load rating at the positive moment location, and 11% greater at the negative moment location. The increased load rating is primarily due to unintended composite action. Since unintended composite action is not reliable for load-levels above the linear-elastic region, the effect of unintended composite action is removed, resulting in a reliable experimental rating load rating that is 46% greater than the analytical load rating at the positive moment location. The grillage model indicates that additional stiffness due to skew contributes to a 19% increase in the positive moment load rating. The case study demonstrates that the proposed method provides a more accurate determination of the skew effect, compared to the theoretical equations currently in use, because the location of the girder and moment under consideration, the arrangement and position of cross-frames and parapets, and the location of loading applied on the bridge are explicitly incorporated. Therefore, field testing coupled with a grillage model has the potential to effectively load rate skewed highway bridges.
Book Synopsis Experimental Load Rating of a Slab-on-steel Girder Bridge by : Troy L. Frederick
Download or read book Experimental Load Rating of a Slab-on-steel Girder Bridge written by Troy L. Frederick and published by . This book was released on 1998 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Analysis Methods and Construction Engineering of Curved and Skewed Steel Girder Bridges by :
Download or read book Guidelines for Analysis Methods and Construction Engineering of Curved and Skewed Steel Girder Bridges written by and published by Transportation Research Board. This book was released on 2012 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 725: Guidelines for Analysis Methods and Construction Engineering of Curved and Skewed Steel Girder Bridges offers guidance on the appropriate level of analysis needed to determine the constructability and constructed geometry of curved and skewed steel girder bridges. When appropriate in lieu of a 3D analysis, the guidelines also introduce improvements to 1D and 2D analyses that require little additional computational costs."--Publication information.
Book Synopsis A Comparison of Experimental and Computed Lateral Load Distribution for Two Continuous Steel Girder Highway Bridges by : Edwin A. McDougle
Download or read book A Comparison of Experimental and Computed Lateral Load Distribution for Two Continuous Steel Girder Highway Bridges written by Edwin A. McDougle and published by . This book was released on 1975 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Skewness on Steel Girder Highway Bridges by : Firas Nazih Bou Diab
Download or read book Effect of Skewness on Steel Girder Highway Bridges written by Firas Nazih Bou Diab and published by . This book was released on 2005 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current thesis presents the finite element results of a parametric study to accurately evaluate the effect of skewness on wheel load distribution in steel g irder highway bridges. The finite element method is used to investigate the effect of span length, girder spacing, and skewness, on one-span simply supported, two-lane, th reelane, and four-lane steel girder bridges. Five span lengths and three girder spacings are examined in combination with six skew angles, for a total of 270 bridges analyze d and reported in the study. Various positions of the design trucks are assumed, longi tudinally and transversally, in order to produce maximum bending moments. The finite eleme nt modeling consists of shells and frames, for concrete slab and steel girders, res pectively, and composite action between slab and girders is assumed. The finite element pro gram SAP2000 is used in the analysis, and the longitudinal bending moments are comput ed and corresponding wheel load distribution factors on the girders are reported an d discussed for various skew angles. The finite element analysis results for skewe d bridges are compared to the reference straight bridges as well as to the America n Association for State Highway and Transportation Officials (AASHTO) Standard Specifications and LRFD procedures. This study will assist bridge engineers in performing realistic analysis and design of simply supported, multi-lane, skewed steel girder bridges as well as evaluate the load carrying capacity of existing struct ures.
Book Synopsis Influence of Secondary Components on the Serviceability of Steel Girder Highway Bridges by : Mohamed Abdel-Azim Elewa
Download or read book Influence of Secondary Components on the Serviceability of Steel Girder Highway Bridges written by Mohamed Abdel-Azim Elewa and published by . This book was released on 2004 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the 8th International Conference on Civil Engineering by : Guangliang Feng
Download or read book Proceedings of the 8th International Conference on Civil Engineering written by Guangliang Feng and published by Springer Nature. This book was released on 2022-04-12 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is a collection of accepted papers from the 8th International Conference on Civil Engineering (ICCE2021). Researchers and engineers have discussed and presented around three major topics, i.e., construction and structural mechanics, building materials, and transportation and traffic. The content provide new ideas and practical experiences for both scientists and professionals.
Book Synopsis Improved Design Specifications for Horizontally Curved Steel Girder Highway Bridges by : Dann H. Hall
Download or read book Improved Design Specifications for Horizontally Curved Steel Girder Highway Bridges written by Dann H. Hall and published by Transportation Research Board. This book was released on 1999 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Advances in Computational and Experimental Mechanics, Vol—I by : D. Maity
Download or read book Recent Advances in Computational and Experimental Mechanics, Vol—I written by D. Maity and published by Springer Nature. This book was released on 2022-01-01 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book (Vol. - I) presents select proceedings of the first Online International Conference on Recent Advances in Computational and Experimental Mechanics (ICRACEM 2020) and focuses on theoretical, computational and experimental aspects of solid and fluid mechanics. Various topics covered are computational modelling of extreme events; mechanical modelling of robots; mechanics and design of cellular materials; mechanics of soft materials; mechanics of thin-film and multi-layer structures; meshfree and particle based formulations in continuum mechanics; multi-scale computations in solid mechanics, and materials; multiscale mechanics of brittle and ductile materials; topology and shape optimization techniques; acoustics including aero-acoustics and wave propagation; aerodynamics; dynamics and control in micro/nano engineering; dynamic instability and buckling; flow-induced noise and vibration; inverse problems in mechanics and system identification; measurement and analysis techniques in nonlinear dynamic systems; multibody dynamical systems and applications; nonlinear dynamics and control; stochastic mechanics; structural dynamics and earthquake engineering; structural health monitoring and damage assessment; turbomachinery noise; vibrations of continuous systems, characterization of advanced materials; damage identification and non-destructive evaluation; experimental fire mechanics and damage; experimental fluid mechanics; experimental solid mechanics; measurement in extreme environments; modal testing and dynamics; experimental hydraulics; mechanism of scour under steady and unsteady flows; vibration measurement and control; bio-inspired materials; constitutive modelling of materials; fracture mechanics; mechanics of adhesion, tribology and wear; mechanics of composite materials; mechanics of multifunctional materials; multiscale modelling of materials; phase transformations in materials; plasticity and creep in materials; fluid mechanics, computational fluid dynamics; fluid-structure interaction; free surface, moving boundary and pipe flow; hydrodynamics; multiphase flows; propulsion; internal flow physics; turbulence modelling; wave mechanics; flow through porous media; shock-boundary layer interactions; sediment transport; wave-structure interaction; reduced-order models; turbo-machinery; experimental hydraulics; mechanism of scour under steady and unsteady flows; applications of machine learning and artificial intelligence in mechanics; transport phenomena and soft computing tools in fluid mechanics. The contents of these two volumes (Volumes I and II) discusses various attributes of modern-age mechanics in various disciplines, such as aerospace, civil, mechanical, ocean engineering and naval architecture. The book will be a valuable reference for beginners, researchers, and professionals interested in solid and fluid mechanics and allied fields.
Book Synopsis Development of LRFD Specifications for Horizontally Curved Steel Girder Bridges by : J. M. Kulicki
Download or read book Development of LRFD Specifications for Horizontally Curved Steel Girder Bridges written by J. M. Kulicki and published by Transportation Research Board National Research. This book was released on 2006 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains the findings of research performed to develop design specifications for horizontally curved steel girder bridges.
Book Synopsis Field testing and load rating of a steel-girder highway bridge by : Peter Schönwetter
Download or read book Field testing and load rating of a steel-girder highway bridge written by Peter Schönwetter and published by . This book was released on 1999 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inelastic Rating Procedures for Steel Beam and Girder Bridges by : Theodore V. Galambos
Download or read book Inelastic Rating Procedures for Steel Beam and Girder Bridges written by Theodore V. Galambos and published by Transportation Research Board. This book was released on 1993 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Residual Damage Analysis by : Burl Edward Dishongh
Download or read book Residual Damage Analysis written by Burl Edward Dishongh and published by . This book was released on 1990 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Impact Factors for Bridges by : David I. McLean
Download or read book Dynamic Impact Factors for Bridges written by David I. McLean and published by Transportation Research Board. This book was released on 1998 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to state department of transportation and consulting bridge, structural, and research engineers. The synthesis describes the current state of the practice for determining dynamic impact factors for bridges. Information for the synthesis was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search using domestic and foreign sources. This report of the Transportation Research Board documents relevant background and recent information with regard to vehicular dynamic load effects on bridges. It provides details on the basic concepts of bridge dynamics, including identification of the main variables affecting bridge dynamic response. In addition, current code provisions for accounting for vehicular dynamic load effects for new bridge design and load evaluation of existing bridges are reported, including a discussion on the background of the provisions. Finally, a discussion of observed field problems associated with vehicular dynamic load effects, as obtained from the survey, are included.
Book Synopsis Correlation of Bridge Load Capacity Estimates with Test Data by : Edwin G. Burdette
Download or read book Correlation of Bridge Load Capacity Estimates with Test Data written by Edwin G. Burdette and published by Transportation Research Board National Research. This book was released on 1988 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Katalog der Großwetterlagen Europas nach Paul Hess und Helmuth Brezowski by : Paul Hess
Download or read book Katalog der Großwetterlagen Europas nach Paul Hess und Helmuth Brezowski written by Paul Hess and published by . This book was released on 2005 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thougtit that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 31 (thesis year 1986) a total of 11 ,480 theses titles trom 24 Canadian and 182 United States universities. We are sure that this broader base tor these titles reported will greatly enhance the value ot this important annual reterence work. While Volume 31 reports theses submitted in 1986, on occasion, certain univer sities do re port theses submitted in previousyears but not reported at the time.
