Download or read book Finite Element Analysis of Splayed Steel Girder Bridges written by Faress Hraib and published by . This book was released on 2015 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A splayed girder bridge is a bridge which consists of a deck slab supported on girders with linearly varying spacing. The simple formulas and approximate design procedures in the AASHTO LRFD Bridge Design Specifications are supposed to be used with regular bridges, where the girders are parallel and the deck slab width is constant. For splayed girder bridges, the specifications suggest a refined method of analysis, which could be expensive and time-consuming. Extending the simple live load girder distribution factors and the deck slab strip method to splayed girder bridges would be very helpful for bridge designers. The objective of this research is to investigate the effect of girder splayedness in slab-on-steel-girder bridges on the dead and live load distribution in the deck slab as well as among the interior and exterior girders. Fifteen composite steel girder bridges are analyzed by the finite element method using the computer software ANSYS. In the computer model, 4-node rectangular shell elements were used for the steel girder flanges and web, 2-node beam elements for the cross-bracing, and 8-node solid elements in the deck slab. Linearly-elastic material behavior is utilized and the model is verified against laboratory and field tests of actual bridges. The effects of the girder splayedness angle, girder spacing, number of girders, deck slab thickness, span length, girder stiffness, and presence of cross-bracing are considered. The study showed that the tributary width concept is reliable for determining the dead load on the splayed girders. Also, the girder distribution factors for flexure in the AASHTO LRFD specifications can be reasonably used for splayed girder bridges if the specific girder spacing at the location of each axle of the truck in the longitudinal direction is considered. On the other hand, the lever rule can provide a good estimate of the live load distribution among splayed girders when subjected to shear. With regard to the live and dead load effect in the deck slab, the equivalent strip method can be a reasonable predictor of the critical positive and negative bending moments in the slab interior regions and in the overhang, provided more than one strip are taken at some discrete locations along the bridge centerline. "--Abstract.
Download or read book Finite Element Analysis and Design of Steel and Steel Concrete Composite Bridges written by Ehab Ellobody and published by Butterworth-Heinemann. This book was released on 2014-05-30 with total page 683 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, bridge engineers and researchers are increasingly turning to the finite element method for the design of Steel and Steel-Concrete Composite Bridges. However, the complexity of the method has made the transition slow. Based on twenty years of experience, Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges provides structural engineers and researchers with detailed modeling techniques for creating robust design models. The book’s seven chapters begin with an overview of the various forms of modern steel and steel–concrete composite bridges as well as current design codes. This is followed by self-contained chapters concerning: nonlinear material behavior of the bridge components, applied loads and stability of steel and steel–concrete composite bridges, and design of steel and steel–concrete composite bridge components. Constitutive models for construction materials including material non-linearity and geometric non-linearity The mechanical approach including problem setup, strain energy, external energy and potential energy), mathematics behind the method Commonly available finite elements codes for the design of steel bridges Explains how the design information from Finite Element Analysis is incorporated into Building information models to obtain quantity information, cost analysis
Download or read book Finite Element Analysis and Design of Steel and Steel Concrete Composite Bridges written by Ehab Ellobody and published by Elsevier. This book was released on 2023-01-25 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges is brought fully up-to-date and provides structural engineers, academics, practitioners, and researchers with a detailed, robust, and comprehensive combined finite modeling and design approach. The book’s eight chapters begin with an overview of the various forms of modern steel and steel-concrete composite bridges, current design codes (American, British, and Eurocodes), nonlinear material behavior of the bridge components, and applied loads and stability of steel and steel-concrete composite bridges. This is followed by self-contained chapters concerning design examples of steel and steel-concrete composite bridge components as well as finite element modeling of the bridges and their components. The final chapter focuses on finite element analysis and the design of composite highway bridges with profiled steel sheeting. This volume will serve as a valuable reference source addressing the issues, problems, challenges, and questions on how to enhance the design of steel and steel-concrete composite bridges, including highway bridges with profiled steel sheeting, using finite element modeling techniques. Provides all necessary information to understand relevant terminologies and finite element modeling for steel and composite bridges Discusses new designs and materials used in highway and railway bridge Illustrates how to relate the design guidelines and finite element modeling based on internal forces and nominal stresses Explains what should be the consistent approach when developing nonlinear finite element analysis for steel and composite bridges Contains extensive case studies on combining finite element analysis with design for steel and steel-concrete composite bridges, including highway bridges with profiled steel sheeting
Download or read book Finite Element Analysis of a Steel Girder Bridge Subjected to Blast Load written by Mayik Kornelio Koriom and published by . This book was released on 2008 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Analysis of Slab on steel Girder Bridges by the Finite Element Method written by Jian Jun Lin and published by . This book was released on 1992 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Design of Concrete Structures written by Guenter Axel Rombach and published by Thomas Telford. This book was released on 2004 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Finite Element Design of Concrete Structures: practical problems and their solutions the author addresses this blind belief in computer results by offering a useful critique that important details are overlooked due to the flood of information from the output of computer calculations. Indeed, errors in the numerical model may lead in extreme cases to structural failures as the collapse of the so-called Sleipner platform has demonstrated.
Download or read book Finite Element Analysis of Inelastic Behavior of Structural Steel Beams and Bridge Girders written by Pao-Chung Huang and published by . This book was released on 1994 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
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 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.
Download or read book The Finite Element Analysis of Multicell Box Girder Bridges written by Subrata Kumar Maitra and published by . This book was released on 1980 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite element analysis of box girder bridges written by Kevin Robert Moffatt and published by . This book was released on 1974 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Design Guideline for Phase Construction of Steel Girder Bridges written by Atorod Azizinamini and published by . This book was released on 2003 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Analysis of Fatigue Prone Details of the Tuttle Creek Bridge written by and published by . This book was released on 2007 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many older steel girder bridges exhibit distortion-induced fatigue cracking at the cross-frame to girder connections. In a two-girder bridge like the Tuttle Creek Bridge there are no redundant load paths and this problem is of even greater concern. The primary girders of the bridge structure are fatigue critical elements and even when such cracks are relatively small they must be examined extensively. The Tuttle Creek Bridge, built in 1962, developed distortion-induced fatigue cracks in the web gap region. The crack prevention repairs of 1986 were not effective and continued crack growth was observed. The bridge was again repaired recently in the summer of 2005. A finite element study is performed in this study for a typical intermediate girder span, to characterize the behavior of fatigue critical details and to evaluate the effectiveness of the newly installed retrofits. A dual-level finite element analysis was performed using macro-level models of the entire bridge structure and micro-level models of some portions of the bridge under investigation. The finite element procedure was found to be efficient and accurate. The models were calibrated using field strain data obtained from two field tests done before and after the retrofits. The analytical results were in good agreement with the measured field data. The analysis shows that the top flange web gap region is the most susceptible to distortion-induced fatigue. The study successfully explains the observed crack patterns on the bridge. The study indicates a significant reduction in web gap stresses after the retrofit. The retrofit also reduces stresses in the gusset plate region and eliminates the stress concentration near the weld terminations. Based upon the most critical detail and assuming that the traffic volume doubles from the present ADTT of 65, the service life of the bridge is estimated to be over one hundred years.
Download or read book Finite Element Analysis of Prestressed Concrete Structures Using Post Tensioning Steel written by Yu Huang and published by Cambridge Scholars Publishing. This book was released on 2020-05-28 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details the theory and applications of finite element (FE) modeling of post-tensioned (PT) concrete structures, and provides the updated MATLAB code (as of 2019). The challenge of modeling PT prestressed concrete structures lies in the treatment of the interface between the concrete and prestressing tendons. Using MATLAB, this study develops an innovative nonlinear FE formulation which incorporates contact techniques and engineering elements to considerably reduce the need of computational power. This FE formulation has the ability to simulate different PT frame systems with fully bonded, fully unbonded or partially bonded tendons, as well as actual sliding behavior and frictional effects in the tendons. It also allows for the accurate simulation of anchor seating loss.
Download or read book Three Dimensional Finite Element Analysis of Decked Precast Prestressed Concrete Girder Bridges written by Sanjay Chaudhury and published by . This book was released on 2004 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The speed of construction has become the key issue for bridges. This is especially true in cold regions like Alaska, where you face a very short summer season. The speed of construction can be expedited by connections. As there are advantages in connections there are also disadvantages. One of the primary advantages of the connectors is that it makes the load transfer mechanism very efficient. However everything comes for a price. Maintenance of connections is very difficult. Routine inspections are to be made to ensure proper functioning of the system. This becomes a very important factor in Alaska where extreme winter conditions exists. Another issue is that the current connector design is based on an empirical approach. A rational design method is needed. In this study an effort has been made to find the presence of ISD on the live load distribution factor for single lane loading. Using ABAQUS CAE, 3D finite element (FE) models have been developed and analyzed with different parameters. By varying the parameters, different distribution factors corresponding to the reaction, strains (flexure and shear) as well as the forces originating from the connectors are evaluated and compared. This paper provides a basis for future connector design"--Leave iv.
Download or read book System Reliability Models for Evaluation of Corroded Steel Girder Bridges written by Artur A. Czarnecki and published by . This book was released on 2006 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
