Download or read book A Model Study of Lateral Load Distribution on Multi girder Single Span Bridges written by Oswaldo Enrique Palacio Bustillo and published by . This book was released on 1968 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lateral load distribution in a multi beam model bridge written by Fernando Luis Torres and published by . This book was released on 1956 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lateral Load Distribution Factors for Military Vehicles on Multi girder Bridges written by Juan C. Piñero and published by . This book was released on 2002 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lateral Load Distribution Study of One half Scale Model Highway Bridge written by Harilal I. Patel and published by . This book was released on 1968 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Analysis of Simple and Continuous Multilane Bridges written by Abbas Maarouf Kesserwan and published by . This book was released on 1996 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the design of highway bridges, structural engineers are faced with the determination of realistic lateral load distribution on steel girders. AASHTO Bridge Specifications contains a simple procedure used in the analysis and design of steel girder bridges. This procedure consists of calculating the maximum bending moment in an isolated individual girder under the application of a wheel line load (from a design truck load), and then multiplying the corresponding moment by an empirically derived distribution factor. In a previous study conducted by Mabsoul et al. (1996). a typical one-span two-lane composite steel girder bridge was analyzed using the finite clement method. Four finite element meshes were tested, of which two were selected for further analyses. A parametric study was performed for a wide variety of span lengths and girder spacings. which were thought to primarily affect the wheel load distribution (Tarhini et al. 1992). This study, which served to assess current design procedures (AASHTO 1992 and 1994). was limited to single-span two-lane bridges only. In the proposed research, the finite element analysis is extended to simple and continuous multi-lane steel girder bridges. The analysis will consider simple (one-span) and two-span bridges with two. three, and four lanes. This study will focus on the determination of the lateral wheel load distribution factor on the girders. Typical steel girder bridges will be discretized and analyzed by the finite element method for a variety of span lengths and girder spacings. Bridges will be loaded by AASHTO design trucks. The position of the truck will be varied along both the longitudinal and lateral directions to produce maximum positive and negative moments in the girders. The finite clement structural program SAP90 (1992) will be used. The proposed research will present a comprehensive study of straight steel girder bridges. It will therefore assist structural engineers in the analysis of simple and continuous multi-lane bridges. The finite element analysis will present an accurate approach for the evaluation of the load-earn ing capacity of existing or new bridges, and will serve to assess approximate methods currently used in bridge design practice.
Download or read book Lateral Load Distribution in Multi beam Bridges written by Alfred Roesli and published by . This book was released on 1955 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1968 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prototype Bridge Structures written by M. Y. H. Bangash and published by Thomas Telford. This book was released on 1999 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This definitive reference volume provides a comprehensive guide to the analysis and design of bridge structures worldwide. The in-depth consideration given to the major analytical, numerical and design issues associated with prototype structures will reduce the effort and expense involved in future construction. The book contains numerous analytical and design examples drawn from existing structures worldwide as well as an extensive bibliography and a large appendix which covers background analyses and computer subroutines.
Download or read book Master s Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1969 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Load Reduction in Multi lane Bridges written by Imad Youssef Naddaf and published by . This book was released on 1998 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the behavior of multi-lane steel girder bridues subject to reduced loading using the finite element method The most critical behavior of a highway bridge is thought to result from a fully loaded bridge (live load on all lanes) It is a common practice to apply reduction factors for bridges with more than two lanes These reduction factors are to account for the probability that all lanes be loaded at the same time Therefore, this study will investigate these reduction factors by analyzing three-lane and four-lane steel girder bridges fully loaded, two out of three-lanes, and three out of four-lanes loaded bridges The behavior of these bridges will be investigated by studying the effect of load removal on the lateral wheel load distribution factor The results of this study w ill be used to assess the empirical reduction factors currentK employed by the American .Association of State Highway and Transportation Officials (AASHTO) "Standard Specifications for Highway Bridges (19%) ".--This study will consider critical parameters identified in previous research such as simple (one-span), and continuous (two-span), girder spacing, span length, three-lane bridges and four-lane bridges The finite element method is proposed to analyze the steel girder bridges by using the structural analysis program SAP90 The research will focus on evaluating the maximum lateral wheel load distribution to the steel girders subject to the full (all lanes are loaded) and reduced (bridge partially loaded) design live loading Bridges will be loaded using AASHTO design taicks positioned in the longitudinal direction in order to produce either the maximum positive and/or the maximum negative bending moments.
Download or read book Lateral load distribution on transverse floor beams in steel plate girder bridges written by Karl Richard Pennings and published by . This book was released on 1999 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Live Load Distribution in Multi cell Box Girder Bridges and Its Comparison with the AASHTO LRFD Bridge Design Specifications written by Shin-Tai Song and published by . This book was released on 2001 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory and Design of Bridges written by Petros P. Xanthakos and published by John Wiley & Sons. This book was released on 1994 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indeed, this essential working reference for practicing civil engineers uniquely reflects today's gradual transition from allowable stress design to Load and Resistance Factor Design by presenting LRFD specifications - developed from research requested by AASH-TO and initiated by the NCHRP - which spell out new provisions in areas ranging from load models and load factors to bridge substructure elements and foundations.
Download or read book The Impact of the AASHTO LRFD Design Code on Bridge Stiffness and Strength written by Thomas Thaxton Baber and published by . This book was released on 2007 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Commonwealth of Virginia is currently transitioning from the long-used AASHTO Allowable Stress Design (ASD) specification to AASHTO's Load and Resistance Factor Design (LRFD) specification. The new specification features revised live loads, more conservative impact factors, a new load distribution method for analysis, and a probabilistically based limit state design approach. Traditional deflection limits have been made optional in the LRFD format. The extensive changes in the specification make it unclear as to whether bridges designed using the LRFD specification will be more or less flexible than those designed using the ASD specification. A series of bridges were designed using both ASD and LRFD formats to investigate what, if any, significant changes in bridge flexibility might be encountered and whether deflection limits are more or less likely to be violated with the LRFD format. Based upon the design of six single-span bridges with varying spans and numbers of girders, and a partial design of a three-span continuous bridge, it was concluded that the LRFD designs tend to be lighter and more economical in general and also tend to be more flexible than ASD designs of the same bridge. The weight savings appears to be more pronounced on single-span bridges than on multiple-span bridges because of the greater significance of local and lateral stability concerns in the finished bridges for multi-span bridges.
Download or read book Single Lane Live Load Distribution Factor for Decked Precast prestressed Concrete Girder Bridges written by John Zhongguo and published by . This book was released on 2005 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The live load distribution factor (DF) equations provided by AASHTO-LRFD for the decked precast/prestressed concrete (DPPC) girder bridge system do not differentiate between a single or multilane loaded condition. This practice results in a single lane load rating penalty for DPPC girder bridges. The objective of this project is to determine DF equations which accurately predict the distribution factor of the DPPC girder bridge system when it is only subjected to single lane loading. Eight DPPC girder bridges were instrumented. Each bridge was loaded with a single load vehicle to simulate the single lane loaded condition. The experimental data was used to calibrate 3D FE models and 2D grillage models of the DPPC girder bridge system. The calibrated models were used to conduct a parametric study of the DPPC girder bridge system subjected to a single lane loaded condition. Two sets of new equations that describe the single lane loaded distribution factor for both shear and moment forces of these bridges are proposed and compared with AASHTOLRFD DF equations.
Download or read book NCHRP Report written by and published by . This book was released on 1964 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Lateral Post tension in the Load Distribution of Multi beam Bridges written by Constantin Vasil Parathiras and published by . This book was released on 1960 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
