Download or read book A Theoretical Investigation of the Dynamic Behavior of Horizontally Curved Steel Box Girder Bridges Under Truck Loadings written by Nicolas H. Galdos and published by . This book was released on 1988 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1989 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavior Design and Construction of Horizontally Curved Composite Steel Box Girder Bridges microform written by Muayad Whyib Aldoori and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Horizontally curved girder bridges have been used considerably in recent years in highly congested urban areas. However, although significant research on physical testing and advanced analysis has been underway for the past decade, the practical employment of many recommendations has not been achieved by the engineering community nor have standards reflecting this work been brought into practice. The design process of curved composite bridges involves tracking the stresses and the potential failure change in the girders during erection, construction and service loading stages. For structural safety and serviceability, the designer estimates the stresses induced within the bridge and assure that they do not exceed the applicable specified limit state as required in bridge design standards. However, the designer may be concerned about the level of approximation that is used in his estimate or even the applicability of the underlying theory. To answer this question and provide the designer with more insight into the behavior of the curved bridges, the field testing during construction and service loading of a curved bridge located near Baltimore, Maryland is re-examined here using linear elastic three-dimensional finite element modeling. Comparisons are made between the finite element results and the measured results. Finally, to facilitate the finite element modeling effort for use by a designer, ANSYS Parametric Design Language (APDL) capabilities are used here to develop an analysis/design tool for "Bath-Tub" style curved steel girder bridges. This tool is then used to evaluate the effects of several important design variables on the response and behavior of the girders during the construction phase. This study demonstrates the ability of finite element modeling to assess the stiffness, serviceability performance, buckling behavior and ultimate strength of curved bridges during construction and it is a major step towards a performance based approach to design for stability. The level of safety or reliability that would be available during the erection and the construction processes of horizontally curved girder bridges represents another major concern for the designer. A three span continuous curved box girder bridge in Houston, Texas is used in this study as an example reflecting current detailing and fabricating practice and it is chosen for a detailed evaluation of the structural safety/reliability during the erection and construction process. This task involves simulating the girder erection and concrete slab placement sequence of the bridge using comprehensive nonlinear three dimensional finite element modeling.

Download or read book Moving Loads Dynamic Analysis and Identification Techniques written by Siu-Seong Law and published by CRC Press. This book was released on 2011-02-18 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction phenomenon is very common between different components of a mechanical system. It is a natural phenomenon and is found with the impact force in aircraft landing; the estimation of degree of ripeness of an apple from impact on a beam; the interaction of the magnetic head of a computer disk leading to miniature development of modern c

Download or read book Dynamic and Static Analyses of Continuous Curved Composite Multiple box Girder Bridges written by Magdy Said Samaan and published by . This book was released on 2004 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Design Specifications and Commentary for Horizontally Curved Concrete Box girder Bridges written by Nutt, Redfield, and Valentine and published by Transportation Research Board National Research. This book was released on 2008 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides specifications, commentary, and examples for the design of horizontally curved concrete box-girder highway bridges. The report details the development of the design procedures. Recommended Load and Resistance Factor Design (LRFD) specifications and design examples illustrating the application of the design methods and specifications are included in appendixes (available on the TRB website at http://trb.org/news/blurb_detail.asp?id=9596).

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1988 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigation and Finite Element Nonlinear Analysis of Continuous Composite Curved Multi cell Box girder Bridges written by GuoQiang Xi and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies on ultimate limit states and nonlinear behaviors of bridges will greatly enhance the understanding of bridge engineers on the moment and shear distribution and the general performance of bridges under load. Described herein is an experimental and theoretical investigation of ultimate loads and nonlinear behaviors of two-span continuous composite curved multi-cell box-girder bridges with a single column as middle support and subjected to OHBDC design truck loadings. The curved bridges are modeled by using the finite element methods. The deck slab, webs, the bottom plate and diaphragms are modeled by 4-node shell elements while the shear connectors and the single middle column are modeled by 3-D beam elements. The existing software COSMOS/M is used for the analysis. A model test of a two-span continuous composite curved multi-cell box-girder bridge with a single column at the middle support is conducted to verify the finite element method. Idealized bridges with different parameters are also studied. Consideration is given to many of the variables that significantly influence ultimate loads and nonlinear behaviors of such bridges. Several rational suggestions are made to enhance the design of two-span continuous composite curved four-cell box-girder bridges.

Download or read book Experimental and Theoretical Investigation of Horizontally Curved Girder Highway Bridges written by Terry R. Douglas and published by . This book was released on 1972 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1989 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steel Box Girder Bridges written by and published by Thomas Telford Publishing. This book was released on 1973 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue of Curved Steel Bridge Elements written by J. Hartley Daniels and published by . This book was released on 1980 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Theoretical and Experimental Investigation of a Curved Single Cell Box girder Bridge written by John A. Hood and published by . This book was released on 1976 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Analysis and Testing of a Curved Girder Bridge written by Matthew R. Tilley and published by . This book was released on 2006 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a result of increasing highway construction and expansion, a corresponding need to increase traffic capacity in heavily populated areas, and ever-increasing constraints on available land for transportation use, there has been an increasing demand for alignment geometries and bridge configurations that result in more efficient use of available space. As a result of this demand, there has been a steady increase in the use of curved girder bridges over the past 30 years. Despites extensive research relating to the behavior of these types of structures, a thorough understanding of curved girder bridge response, especially relating to dynamic behavior, is still incomplete. To develop an improved, rational set of design guidelines, the Federal Highway Administration (FHWA) initiated the Curved Steel Bridge Research Project in 1992. As part of this project, FHWA constructed a full-scale model of a curved steel girder bridge at its Turner-Fairbank Structures Laboratory. This full-scale model made it possible to conduct numerous tests and collect a significant amount of data relating to the static behavior of a curved girder bridge. However, relatively little information has been available on the dynamic response of curved girder bridges and this type of information is needed before a complete design specification can be developed. The objective of this study was to develop a finite element model using SAP2000 that could be used for predicting and evaluating the dynamic response of a curved girder bridge. Models of the FHWA curved girder bridge were developed using both beam and shell elements and response information compared with experimental data and with analytical data from other finite element codes. The experimental data were obtained during dynamic testing of the full-scale bridge in the Turner-Fairbank Structures Laboratory and analytical response information was provided from finite element models of the bridge using ANSYS and ABAQUS. The primary focus of the study was the prediction of frequencies and mode shapes of the full-scale curved girder both with and without a deck. Both experimental and analytical frequencies and mode shapes were calculated and compared. Although the more refined ANSYS and ABAQUS models provided response data that compared more favorably with the experimental data, the SAP2000 models were found to be more than adequate for predicting the lower modes and frequencies of the bridge.

Download or read book Fatigue of Curved Steel Bridge Elements written by J. Hartley Daniels and published by . This book was released on 1980 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on the fatigue behavior of horizontally curved, steel bridge elements was conducted at Fritz Engineering Laboratory, Lehigh University, under the sponsorship of the Federal Highway Administration (FHWA) of the U.S. Department of Transportation. The multi-phase investigation spanning nearly five years was performed in five tasks. This is the eighth and final report of the project and presents the results of Task 5: development of design recommendations suitable for inclusion in the AASHTO bridge design specifications. The entire project is described and the findings summarized which were presented in the previous project reports.

Download or read book Experimental and Analytical Investigation on the Behavior of Continuous Box Girder Bridges written by Maroun Ghosn Wakim and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous curved box girder bridges are increasingly being used in metropolitan large cities particularly as flyovers and as entrance and exit ramps for highspeed freeways. The purpose of this investigation is to examine the static response of continuous curved box girder bridges subjected to various specified OHBD loadings. The prototype structure that was selected for this model study is the Cyrville road Queensway overpass located in the east end of Ottawa. The structure was built in 1973 and designed according to ASHTO design truck load HS20-44 by the Ministry of Transportation and Communication. The bridge is 102.4 meters long, 12.8 meters wide, and consists of two spans with 16.8$\sp\circ$ horizontal angle of curvature between the end supports. Its cross section consists of four contiguous cells with a depth of 1.83 meters. As for the diaphragms, two prestressed diaghragms are placed at the extreme end supports and one is placed over the middle support.

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1973 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt: