Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Investigation Of Intermediate Diaphragm Loads On Steel Bridges 1994
Download Investigation Of Intermediate Diaphragm Loads On Steel Bridges 1994 full books in PDF, epub, and Kindle. Read online Investigation Of Intermediate Diaphragm Loads On Steel Bridges 1994 ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Investigation of Intermediate Diaphragm Loads on Steel Bridges. 1994 by : New Mexico. State Highway and Transportation Department
Download or read book Investigation of Intermediate Diaphragm Loads on Steel Bridges. 1994 written by New Mexico. State Highway and Transportation Department and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Steel Diaphragms in Prestressed Concrete Girder Bridges by : Robert Emil Abendroth
Download or read book Steel Diaphragms in Prestressed Concrete Girder Bridges written by Robert Emil Abendroth and published by . This book was released on 2004 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Lateral Load Resistance of Diaphragms in Prestressed Concrete Girder Bridges by : R. E. Abendroth
Download or read book Lateral Load Resistance of Diaphragms in Prestressed Concrete Girder Bridges written by R. E. Abendroth and published by . This book was released on 1991 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each year several prestressed concrete girder bridges in Iowa and other states are struck and damaged by vehicles with loads too high to pass under the bridge. Whether or not intermediate diaphragms play a significant role in reducing the effect of these unusual loading conditions has often been a topic of discussion. A study of the effects of the type and location of intermediate diaphragms in prestressed concrete girder bridges when the bridge girder flanges were subjected to various levels of vertical and horizontal loading was undertaken. The purpose of the research was to determine whether steel diaphragms of any conventional configuration can provide adequate protection to minimize the damage to prestressed concrete girders caused by lateral loads, similar to the protection provided by the reinforced concrete intermediate diaphragms presently being used by the Iowa Department of Transportation. The research program conducted and described in this report included the following: A comprehensive literature search and survey questionnaire were undertaken to define the state-of-the-art in the use of intermediate diaphragms in prestressed concrete girder bridges. A full scale, simple span, restressed concrete girder bridge model, containing three beams was constructed and tested with several types of intermediate diaphragms located at the one-third points of the span or at the mid-span. Analytical studies involving a three-dimensional finite element analysis model were used to provide additional information on the behavior of the experimental bridge. The performance of the bridge with no intermediate diaphragms was quite different than that with intermediate diaphragms in place. All intermediate diaphragms tested had some effect in distributing the loads to the slab and other girders, although some diaphragm types performed better than others. The research conducted has indicated that the replacement of the reinforced concrete intermediate diaphragms currently being used in Iowa with structural steel diaphragms may be possible.
Book Synopsis Investigation of Intermediate Diaphragm Loads on Steel Bridges by :
Download or read book Investigation of Intermediate Diaphragm Loads on Steel Bridges written by and published by . This book was released on 1994 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Design Procedure for Intermediate External Diaphragms on Curved Steel Trapezoidal Box Girder Bridges by : Matthew Alex Memberg
Download or read book A Design Procedure for Intermediate External Diaphragms on Curved Steel Trapezoidal Box Girder Bridges written by Matthew Alex Memberg and published by . This book was released on 2002 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing the Needs for Intermediate Diaphragms in Prestressed Concrete Bridges by :
Download or read book Assessing the Needs for Intermediate Diaphragms in Prestressed Concrete Bridges written by and published by . This book was released on 2008 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete Intermediate Diaphragms (IDs) are currently being used in prestressed concrete (PC) girder bridges in Louisiana. Some of the advantages of providing IDs are disputed in the bridge community because the use of IDs increases the cost and time of construction. There is no consistency in the practice of providing IDs among various states and codes of practice, and the overall effectiveness of IDs, as well as the need for them in prestressed concrete bridges, is unclear. The objectives of this research were (1) to assess the need of reinforced concrete (RC) IDs in PC girder bridges and to determine their effectiveness, and (2) to search for a possible alternative steel diaphragm configuration that could replace concrete diaphragms if necessary. The research team has examined and reviewed state-of-the-art technology and current practices from many sources of information on IDs. Through a survey questionnaire and review of the Louisiana Department of Transportation and Development (LADOTD) Bridge Design Manual, the research team obtained relevant information regarding the ID practices in Louisiana. Through the LADOTD data base for all state bridges, and from direct interaction with district engineers, several of the bridges that are of interest for this study were selected for field inspection. From these field trips to various bridge locations, much information has been acquired from the bridges themselves, as well as from the district engineers. Systematic parametric studies for various bridge configurations, which are representative of an entire range of bridge geometries with different parameters, were analyzed through simplified and solid finite element models. This study was performed on right and skewed bridges, which are simply supported and continuous. A reduction factor that could be multiplied by the AASHTO load distribution factor to account for the influence of the diaphragm in load distribution was developed. A finite element analysis was carried out using 3-D solid models to assess the effectiveness of various diaphragms in protecting the girders against the lateral impact and to determine the design forces in the steel bracing members during construction of deck. The results from the parametric studies indicated that several parameters such as skew, span length, spacing, stiffness of diaphragm and girder have different levels of influence on the effectiveness of diaphragms in live load distribution for bridges. Correction factors that could quantify the ID influence on load distribution were developed. Results from various studies indicated that a steel diaphragm section can possibly replace the RC diaphragms. A prestressed concrete bridge was tested in the field. This bridge was selected by an inspection team comprised of personnel from FHWA, LADOTD, and the LSU research team and is located over Cypress Bayou on LA 408 East, in District 61. A comprehensive instrumentation and loading scheme is presented and illustrated in this report. The instrumentation consists of LVDTs - Linear Variable Differential Transformers (to measure the midspan deflection of each girder), accelerometers, strain gauges, and acoustic emission sensors. The measured results are presented, and comparisons are made between the finite element model and the field tests.
Book Synopsis Impact of Construction Loads on Steel Diaphragm Bridge Design by : Lauren K. Stewart
Download or read book Impact of Construction Loads on Steel Diaphragm Bridge Design written by Lauren K. Stewart and published by . This book was released on 2022 with total page 0 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:
Book Synopsis Lateral Impact Response for Prestressed Concrete Girder Bridges with Intermediate Diaphragms by : Bassem Onsi Andrawes
Download or read book Lateral Impact Response for Prestressed Concrete Girder Bridges with Intermediate Diaphragms written by Bassem Onsi Andrawes and published by . This book was released on 2001 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each model was analyzed with either one RC or two different types of steel intermediate diaphragms. The bridge models were analyzed for a lateral impact load applied at different locations along the bottom flange of an exterior girder. A comparison was made between the induced strains and displacements in the girders for each diaphragm case. This study revealed that intermediate diaphragms have an effect on reducing girder damage in PC girder bridges. When a lateral impact load was applied at a diaphragm location, the RC diaphragm provided more damage protection for the girders than that provided by either of the two selected steel diaphragms. The three types of diaphragms studied essentially provided the same degree of damage protection when a lateral impact load was applied away from a diaphragm location.
Book Synopsis Methods to Reduce Built-in Residual Stresses in Steel Bridge Diaphragms (Phase I) by : Jeffrey M. South
Download or read book Methods to Reduce Built-in Residual Stresses in Steel Bridge Diaphragms (Phase I) written by Jeffrey M. South and published by . This book was released on 2000 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering for Structural Stability in Bridge Construction by : Federal Highway Federal Highway Administration
Download or read book Engineering for Structural Stability in Bridge Construction written by Federal Highway Federal Highway Administration and published by . This book was released on 2020-07-19 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual is intended to serve as a reference. It will provide technical information which will enable Manual users to perform the following activities:Describe typical erection practices for girder bridge superstructures and recognize critical construction stagesDiscuss typical practices for evaluating structural stability of girder bridge superstructures during early stages of erection and throughout bridge constructionExplain the basic concepts of stability and why it is important in bridge erection* Explain common techniques for performing advanced stability analysis along with their advantages and limitationsDescribe how differing construction sequences effect superstructure stabilityBe able to select appropriate loads, load combinations, and load factors for use in analyzing superstructure components during constructionBe able to analyze bridge members at various stages of erection* Develop erection plans that are safe and economical, and know what information is required and should be a part of those plansDescribe the differences between local, member and global (system) stability
Book Synopsis Seismic Performance of Steel Bridges During the 1994 Northridge Earthquake by : Abolhassan Astaneh-Asl
Download or read book Seismic Performance of Steel Bridges During the 1994 Northridge Earthquake written by Abolhassan Astaneh-Asl and published by . This book was released on 1994 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Field Study of Diaphragm Behavior and Performance in Multigirder Steel Bridges by : Thomas Eric Stafford
Download or read book A Field Study of Diaphragm Behavior and Performance in Multigirder Steel Bridges written by Thomas Eric Stafford and published by . This book was released on 1996 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Diaphragm Action in a Steel Stringer Bridge with an Unbonded Slab by : Frederick Robert Jetter
Download or read book An Investigation of Diaphragm Action in a Steel Stringer Bridge with an Unbonded Slab written by Frederick Robert Jetter and published by . This book was released on 1966 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effectiveness of Intermediate Diaphragms in Distributing Live Loads in Beam-and-slab Bridges by : Ravindra P. Jategaonkar
Download or read book Effectiveness of Intermediate Diaphragms in Distributing Live Loads in Beam-and-slab Bridges written by Ravindra P. Jategaonkar and published by . This book was released on 1985 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Research Results on Bridge Health Monitoring, Maintenance and Safety III by : Yang Liu
Download or read book Some Research Results on Bridge Health Monitoring, Maintenance and Safety III written by Yang Liu and published by Trans Tech Publications Ltd. This book was released on 2013-09-04 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is indexed by Thomson Reuters BCI (WoS). The amount of deteriorating bridges is increasing gradually, and the costs of maintenance, repair and rehabilitation of these bridges often far exceed available budgets. To alleviate this issue, the bridge engineering profession continues to take positive steps towards developing more comprehensive bridge monitoring and management systems. This collection of invited papers encompasses some aspects of bridge health monitoring, maintenance and safety. Specifically, it deals with: bridge health monitoring; bridge repair and rehabilitation issues; bridge related safety and other implications.
Book Synopsis Rapid Assessment of Distortional Stresses in Multi-girder Steel Bridges by : Benjamin Severtson
Download or read book Rapid Assessment of Distortional Stresses in Multi-girder Steel Bridges written by Benjamin Severtson and published by . This book was released on 2004 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-girder steel bridges are found as part of the transportation infrastructure of countries throughout the world. These bridges are typically constructed with a steel reinforced concrete deck rigidly attached to the top flange of steel girders. The deck and the transverse steel members distribute loads laterally between bridge girders. The weld connecting transverse stiffeners to the girder web are commonly terminated several inches away from the girder flanges to avoid overlapping with the web-to-flange connection weld, leaving a short, unstiffened portion of the girder web-the web gap. The large flexibility of the web gap region relative to the other components forces it to accommodate the majority of the distortion. Since 1998, several research efforts have investigated methods for predicting the amount of web gap stress a bridge will experience during its service life. Phase I of this research resulted in a simple equation for estimating web gap stress using data collected during field testing and subsequent finite modeling of a skew supported bridge with staggering bent-plate diaphragms. Phase II produced an approximate method for predicting diaphragm differential deflection of skew supported bridges with bent-plate diaphragms. The combined result of Phase I and Phase II was a useful method for predicting peak web gap stress in skewed multi-girder steel bridges with staggered bent-plate diaphragms. The next step was to develop a reliable procedure for the rapid assessment of distortional stresses in steel bridges that includes a test of the applicability of this procedure to bridges with geometries differing from those that formed the basis of the previous research. As a consequence of this most current research, the authors propose changes and recommend modifications of previously developed methods of field measurement and assessment.
