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Book Parametric Study of Prestressed Concrete Box Beam Bridges

Download or read book Parametric Study of Prestressed Concrete Box Beam Bridges written by David Holman Deitz and published by . This book was released on 1995 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Study on the Effects of Geometry Loading and Material Parameters in the Web Failure of Curved Box girder Prestressed Concrete Bridges

Download or read book Study on the Effects of Geometry Loading and Material Parameters in the Web Failure of Curved Box girder Prestressed Concrete Bridges written by Mohammad Hossein Sadaghiani and published by . This book was released on 1986 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Adjacent Precast Concrete Box Beam Bridges

Download or read book Adjacent Precast Concrete Box Beam Bridges written by H. G. Russell and published by Transportation Research Board. This book was released on 2009 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.

Book Dynamic Behavior of Composite Adjacent Pre Stressed Concrete Box Beams Bridges

Download or read book Dynamic Behavior of Composite Adjacent Pre Stressed Concrete Box Beams Bridges written by Hajir A. Ali and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite adjacent box beams have been utilized to construct bridges as accelerated bridge constructions. These bridges are constantly subjected to the effect of a moving load as vehicles passing over them. Dynamic load allowance (DLA) is a reliable approach to show the amount of that vehicle-bridge interaction. The allowable value of the load allowance factor is 1.33 in AASHTO LRFD (2017), the Bridge Design Specifications. Many researchers have shown that the dynamic load allowance (DLA) value of AASHTO LRFD (2017) does not necessarily yield to a satisfactory account for the dynamic response of highway bridges under moving load. In addition, there is no comprehensive data about adjacent box beams bridges regarding the dynamic load allowance (DLA). Therefore, there is a need to perform a detailed dynamic analysis of vehicle-induced vibration to accurately estimate the dynamic load allowance (DLA) values. This dynamic analysis should include the influence of the most important dynamic parameters, which are related to both the vehicle and bridge circumstances. A field assessment platform was implemented; two adjacent concrete box beams bridges that were dynamically evaluated under the effect of the vehicle-bridge interaction. Then, based on the collected field data, the dynamic load allowance (DLA) values were calculated for all installed instruments under the effect of numerous load cases. The influence of vehicle weights, speeds, brakes, and road roughness conditions on the values of the load allowance factor (DLA) was conducted. In addition, a full scale finite element analysis was performed to complement the field investigation by looking at other dynamic parameters. Finite element method was utilized to model the adjacent box beams bridge of Fairmount Rd according to the asconstructed drawing and ODOT bridge design manual. After modeling, the bridge model was calibrated and validated to analytically investigate the effect of other dynamic parameters on the behavior of this bridge when it is subjected to a moving vehicle. Moving load included two kinds of analysis, the model analysis, and the dynamic analysis. Hence, a parametric study was performed to investigate the effect of an adjacent concrete box beams bridge span length, skew angle, depth, width, and the effect of the material properties of its girders on the values of the dynamic load allowance (DLA). Results of this study illustrate that the dynamic effect of adjacent box beams bridges subjected to moving truck is too important. Under the effect of vehicle-induced vibration, the dynamic load allowance (DLA) values undergoing the effect of most of the investigated parameters were higher than the design limit of AASHTO LRFD (2017). The dynamic load allowance (DLA) value is considerably affected by the speed of the vehicle, road roughness condition and truck braking, skew angle, and stiffness. An empty truck can increase the values of the allowance factor (DLA). Furthermore, the longer the span length of a bridge, the lower recoded dynamic load allowance (DLA) values were. Depth and width of an adjacent box beams bridge and deck thickness have no effect on the values of the dynamic load allowance (DLA).

Book FULL RANGE BEHAVIOUR OF PRESTR

Download or read book FULL RANGE BEHAVIOUR OF PRESTR written by Xiachun Chen and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Full-range Behaviour of Prestressed Concrete Bridges With Corrugated Steel Webs" by Xiachun, Chen, 陳夏春, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Bridge engineers and researchers have been looking for efficient structural forms under the performance-based concept to satisfy various attributes, including serviceability, safety, economy, constructability, durability, etc. Prestressed concrete bridges with corrugated steel webs have emerged as one of the promising bridge forms due to their remarkable advantages such as efficient prestressing of concrete, high buckling strength of steel webs and lightness. In 1986, the first bridge of this type, Cognac Bridge, was built in France. Its successful application and significant advantages over conventional prestressed concrete bridges have prompted researchers and construction companies in various countries to get involved in this new form of composite structure. However, the full-range behaviour of the bridges covering both the service and failure stages is rather complicated, and has not been systematically studied. In view of the different behaviour of components and the large shear deformation of corrugated steel webs with negligible axial stiffness, the assumption that plane sections remain plane is no longer valid and therefore the classical Euler-Bernoulli and Timoshenko beam models may not be applicable. To study the structural behaviour of prestressed concrete bridges with corrugated steel webs, numerical and experimental investigations were carried out. A sandwich beam theory was developed to investigate both the static and dynamic behaviour numerically. In addition, a modified Timoshenko beam model was developed for linearly elastic analysis of static service behaviour, which provides a convenient alternative for design purpose. In the development of numerical models, special emphasis was placed on the modelling of corrugated steel webs, external prestressing tendons, diaphragms, and interaction between web shear deformation and local flange bending. The numerical models were verified by tests. Using the numerical models proposed, the static service behaviour, dynamic properties and long-term behaviour were studied. Some parametric studies were carried out to further explore their structural behaviour. The sectional ductility, deformability and strength were evaluated by nonlinear analysis taking into account the actual stress-strain curves and path-dependence of materials. The numerical results obtained were compared with experimental results for verification. A parametric study was then undertaken to clarify the effects of various parameters. In the design of this type of bridges, both the ultimate load and ductility should be examined, which requires the estimation of full-range structural behaviour. The sandwich beam model was extended for analysis of the full-range behaviour considering geometric and material nonlinearities. With a nonlinear kinematical theory, complete description of the nonlinear interaction between the external tendons and the bridge was obtained. The numerical model proposed was also verified by experiments. The failure mechanisms were studied experimentally and numerically for more accurate evaluation of safety-related attributes such as ultimate load, ductility and deformability. The formation of plastic hinge and its size were also studied thoroughly in view of their importance in the prediction of full-range behaviour. A simplified method to predict the full-range behaviour was also proposed based on the concept o

Book Precast Segmental Box Girders

Download or read book Precast Segmental Box Girders written by Fadzli Mohamed Nazri and published by Springer. This book was released on 2019-02-09 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the fundamentals of the elastic behaviour of erected precast segmental box girders (SBG) when subjected to static load, as well as the construction process (casting and erection work) involved. It analyzes and compares the experimental results with those obtained using the finite element method and theoretical calculations. A short-term deflection analysis for different loads is obtained by determining the maximum deflection, stress and strain value of single span precast SBG under a variety of transversal slope. The outcome of this work provides a better understanding of the behaviour of precast SBG in terms of structural responses as well as defects, so that maintenance work can then be focused on the critical section at mid span area specifically for the bridge project longitudinally and transversely. The book is of interest to industry professionals involved in conducting static load tests on bridges, and all researchers, designers, and engineers seeking to validate experimental work with numerical and analytical approaches.

Book Development of Design Specifications and Commentary for Horizontally Curved Concrete Box girder Bridges

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. This book was released on 2008 with total page 97 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).

Book Design Sensitivity Studies on Simple Span Prestressed Concrete Beam and Slab Highway Bridge Superstructures

Download or read book Design Sensitivity Studies on Simple Span Prestressed Concrete Beam and Slab Highway Bridge Superstructures written by R. M. Schmidt and published by . This book was released on 1973 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a set of parametric studies on straight, simple span prestressed concrete beam and slab highway bridges are presented as tabulated information for design. The basic data on design parameters and unit costs are typical of current practice and cover a range of spans and all four beam types. Different parameters are then varied, one at a time, and the consequences on cost and on key structural sizes are determined. Proposed metric sections are also studied and key cross-sectional dimensions are varied to indicate where improvements might be made.

Book Concrete Box girder Bridges

Download or read book Concrete Box girder Bridges written by Jörg Schlaich and published by IABSE. This book was released on 1982 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Prestressed Concrete Segmental Bridges

Download or read book Prestressed Concrete Segmental Bridges written by and published by . This book was released on 1979 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Incorporating Shrinkage Effects in FE Modeling of Prestressed Concrete Bridge

Download or read book Incorporating Shrinkage Effects in FE Modeling of Prestressed Concrete Bridge written by Dhara Purani and published by . This book was released on 2013 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Right from the inception of the implementation of prestressed concrete in the bridge construction field, it has been very popular. Even though this type of bridges has big advantages, cracking is a major problem. The cracking event, due to its detrimental effects on the structure is the most objectionable problem. In cracking shrinkage plays a very significant role. This implies that the study of shrinkage is essential to study the phenomenon of cracking. Due to many variables responsible for deck cracking, it is very difficult to study the overall effect of these variegated factors taken in the consideration at a time. This thesis aims to confluence as many such aspects as possible in a single plane of consideration with the help of Finite Element software namely ABAQUS. The goal of this research is to study shrinkage, shrinkage effects, and factors affecting the shrinkage and ultimately to incorporate the shrinkage effects in Finite Element Modeling. Here the study is constrained to Prestressed Concrete Bridge. Thus, the research is carried to incorporate the shrinkage effects in FE Modeling of Prestressed Concrete Bridge. This is a difficult task as many finite element programs do not have pre-programmed methods for simulating the time dependent properties of concrete. Therefore, it is necessary to develop these methods. This study concentrates on trying to simulate the behavior of a simple span bridge as a means of developing the basic analytical method. In the research Abaqus has been selected and the selection has been justified for the purpose of analyzing time dependent effects in bridges. A parametric study has been carried out with a view to identifying the effects of various parameters of shrinkage in a structure. The effects of the parameters such as length of the span, girder spacing, deck thickness and modulus of elasticity of girder have been analyzed with the help of bridges modeled in Abaqus. The parametric study concludes that shrinkage strain increases with increase in length and spacing of girder. The shrinkage strain decreases with increase in compressive strength of girder and deck thickness.

Book Parametric study of curved steel bridges supported on narrow concrete piers

Download or read book Parametric study of curved steel bridges supported on narrow concrete piers written by Jason Eric Olsen and published by . This book was released on 1994 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: