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Author : Robert Mark Barnoff
Publisher :
ISBN 13 :
Total Pages : 215 pages
Book Rating : 4.:/5 (11 download)
Download or read book Construction and Testing of an Experimental Prestressed Concrete Bridge written by Robert Mark Barnoff and published by . This book was released on 1974 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Slack
Publisher :
ISBN 13 :
Total Pages : 330 pages
Book Rating : 4.:/5 (57 download)
Download or read book Experimental Testing of Non-embedded Positive Moment Connections written by Michael Slack and published by . This book was released on 2002 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precast prestressed concrete girders have been used in bridge construction for several years in the United States. In general, these types of bridges have performed well in service conditions. Although the connections provide sufficient continuity for dead loads which cause negative moments, there has been some concern about the ability of the connections to provide continuity for the positive moments caused by live loads. Cracking has been observed at the bottom of the diaphragm at the connection and this raises concern about the connection2s performance. The National Cooperative Highway Research Program developed Project 12-53 to study the effectiveness of these connections. The focus of this research deals with the experimental testing part of project 12-53. Several specimens that represent portions of full-size bridges were tested and fatigued to evaluate their performance after cracking occurs at the bottom of the diaphragm. This report discusses the first two tests involved in the testing program, a bent strand connection and a bent bar connection. Each of the specimens underwent the same sequence of loading. The loading included initial stiffness testing and then cyclic loading to fatigue the connections. Each connection was fatigued until the connection was considered to have failed. Experimental results are included and evaluated with comparisons being made to interpret the results and provide recommendations where possible. Upon examining the results from the first two tests, it was concluded that both connections had similar failure modes. The failure of each connection was consistent with an anchorage type of failure. The ends of the girders pulled away from the diaphragm after a certain number of cycles. In the first test, the strands were simply pulled out of the diaphragm. However, in the second test, the bent bar in the connection fractured before the end of the beam pulled away from the diaphragm. Also, the second connection was stiffer and more durable than the first connection as it endured nearly twice as many cycles than the first connection. Reasons for the second connection being stiffer and more durable is likely attributed to the fact that the connection contains a larger area of steel than the first connection. However, these conclusions are preliminary and await comparison to results from future tests. One conclusion that is clear from the results from test two is the fact that the connection would have lasted longer had the stress in the bent bar been limited to values previously established from research done by PCA in the 19602s. The stress level in the bars during testing exceeded their recommendations and it is believed that had these levels not been exceeded the connection would have performed more efficiently. From the results of this research it could be recommended that bent bar connections be constructed rather than bent strand connections based on stiffness and durability. However, research is continuing on various connection configurations that may prove to be more efficient. The results of the first two tests are intended to be compared to the results of future tests to further evaluate the performance of these connections after cracking occurs at the diaphragm. At the conclusion of testing of all specimens, complete comparisons and interpretations will be made with recommendations concerning the construction of positive moment connections in precast prestressed concrete bridge construction.
Author : Robert Mark Barnoff
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.0/5 ( download)
Download or read book Overload Testing of an Experimental Prestressed Concrete Bridge written by Robert Mark Barnoff and published by . This book was released on 1977 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Mark Barnoff
Publisher :
ISBN 13 :
Total Pages : 127 pages
Book Rating : 4.:/5 (344 download)
Download or read book Overload Testing of an Experimental Prestressed Concrete Bridge written by Robert Mark Barnoff and published by . This book was released on 1977 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohsen A. Issa
Publisher :
ISBN 13 :
Total Pages : 278 pages
Book Rating : 4.:/5 (31 download)
Download or read book Experimental Evaluation of Full Depth Precast/prestressed Concrete Bridge Deck Panels written by Mohsen A. Issa and published by . This book was released on 2002 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: A literature review concerning the objectives of the project was completed. A significant number of published papers, reports, etc., were examined to determine the effectiveness of full depth precast panels for bridge deck replacement. A detailed description of the experimental methodology was developed which includes design and fabrication of the panels and assembly of the bridge. The design and construction process was carried out in cooperation with the project Technical Review Panel. The major components of the bridge deck system were investigated. This includes the transverse joints and the different materials within the joint as well as composite action. The materials investigated within the joint were polymer concrete, non-shrink grout, and set-45 for the transverse joint. The transverse joints were subjected to direct shear tests, direct tension tests, and flexure tests. These tests exhibited the excellent behavior of the system in terms of strength and failure modes. Shear key tests were also conducted. The shear connection study focused on investigating the composite behavior of the system based on varying the number of shear studs within a respective pocket as well as varying the number of pockets within a respective panel. The results indicated that this shear connection is extremely efficient in rendering the system under full composite action. Finite element analysis was conducted to determine the behavior of the shear connection prior to initiation of the actual full scale tests. In addition, finite element analysis was also performed with respect to the transverse joint tests in an effort to determine the behavior of the joints prior to actual testing. The most significant phase of the project was testing a full-scale model. The bridge was assembled in accordance with the procedures developed as part of the study on full-depth precast panels and the results obtained through this research. The system proved its effectiveness in withstanding the applied loading that exceeded eight times the truck loading in addition to the maximum negative and positive moment application. Only hairline cracking was observed in the deck at the maximum applied load. Of most significance was the fact that full composite action was achieved between the precast panels and the steel supporting system, and the exceptional performance of the transverse joint between adjacent panels.
Author : United States. Federal Highway Administration. Offices of Research and Development
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.3/5 (91 download)
Download or read book Report No. FHWA-RD. written by United States. Federal Highway Administration. Offices of Research and Development and published by . This book was released on 1980 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : FIB – International Federation for Structural Concrete
Publisher : FIB - International Federation for Structural Concrete
ISBN 13 : 0907862012
Total Pages : 52 pages
Book Rating : 4.9/5 (78 download)
Download or read book Demolition of reinforced and prestressed concrete structures written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1982-01-01 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Amar Hadj-arab
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (126 download)
Download or read book Behaviour of a One Cell Prestressed Concrete Box Girder Bridge Experimental Study written by Amar Hadj-arab and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the behaviour of a 1:7.10 scale direct physical model of a simply supported single span, one cell, prestressed concrete box girder bridge is presented. The experimental techniques developed for construction and the instrumentation required during testing of the bridge model are summarized. Variation of the flexural stiffness and the dynamic characteristics, such as the damping ratio and the fundamental natural frequency, of the bridge model at different level of damage are presented. [...].
Author : Xiachun Chen
Publisher : Open Dissertation Press
ISBN 13 : 9781361043172
Total Pages : 312 pages
Book Rating : 4.0/5 (431 download)
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
Author :
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.3/5 (555 download)
Download or read book Field/laboratory Testing of Damaged Prestressed Concrete Girder Bridges written by and published by . This book was released on 1999 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to frequent accidental damage to prestressed concrete (P/C) bridges caused by impact from overheight vehicles, a project was initiated to evaluate the strength and load distribution characteristics of damaged P/C bridges. A comprehensive literature review was conducted. It was concluded that only a few references pertain to the assessment and repair of damaged P/C beams. No reference was found that involves testing of a damaged bridge(s) as well as the damaged beams following their removal. Structural testing of 2 damaged bridges was conducted in the field.
Author :
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (3 download)
Download or read book Public Roads written by and published by . This book was released on 1975 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eva Lantsoght
Publisher : CRC Press
ISBN 13 : 0429556489
Total Pages : 429 pages
Book Rating : 4.4/5 (295 download)
Download or read book Load Testing of Bridges written by Eva Lantsoght and published by CRC Press. This book was released on 2019-06-26 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Load Testing of Bridges, featuring contributions from almost fifty authors from around the world across two interrelated volumes, deals with the practical aspects, the scientific developments, and the international views on the topic of load testing of bridges. Volume 13, Load Testing of Bridges: Proof Load Testing and the Future of Load Testing, focuses first on proof load testing of bridges. It discusses the specific aspects of proof load testing during the preparation, execution, and post-processing of such a test (Part 1). The second part covers the testing of buildings. The third part discusses novel ideas regarding measurement techniques used for load testing. Methods using non-contact sensors, such as photography- and video-based measurement techniques are discussed. The fourth part discusses load testing in the framework of reliability-based decision-making and in the framework of a bridge management program. The final part of the book summarizes the knowledge presented across the two volumes, as well as the remaining open questions for research, and provides practical recommendations for engineers carrying out load tests. This work will be of interest to researchers and academics in the field of civil/structural engineering, practicing engineers and road authorities worldwide.
Author : University of Illinois Engineering Experiment Station
Publisher :
ISBN 13 :
Total Pages : 622 pages
Book Rating : 4.:/5 (31 download)
Download or read book Progress Report of the Investigation of Prestressed Concrete for Highway Bridges written by University of Illinois Engineering Experiment Station and published by . This book was released on 1966 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (319 download)
Download or read book Transportation written by and published by . This book was released on 1975-05-14 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.3/5 (555 download)
Download or read book Techniques for Measuring Existing Long-term Stresses in Prestressed Concrete Bridges written by and published by . This book was released on 1990 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various stress measurement techniques were evaluated in this study. The evaluation included a state-of-the-art review of existing techniques and analytical studies of these techniques. Based on analytical results, the flat-jack direct stress measurement technique was evaluated in laboratory and field tests. Based on these tests, a manual of instruction was written to describe the equipment and procedures required to obtain reliable direct stress measurement. This is the Executive Summary which summarizes the findings of this research project.
Author : Madhan Kumar Kantha Samy
Publisher :
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.:/5 (181 download)
Download or read book Field Test and Analysis of Two Prestressed Concrete Bridges After Deck Replacement with Frp Panels written by Madhan Kumar Kantha Samy and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridges B-0071 and B-0171 in Hamilton County, Ohio have been in service for about fifty years. They are short span bridges with prestressed concrete girders. Until late 2001, they had conventional reinforced concrete decks, which have been replaced with fiber reinforced polymer (FRP) decks. Two girders in bridge B-0171 were replaced with new prestressed girders. These bridges are significant as there are few instances of FRP decks on concrete girders. The Hamilton County Engineers Office contracted with the Civil Engineering Department at the University of Cincinnati to perform load testing on the bridges. Information gained from this research will seek to confirm the safety of the new technology, evaluate construction and design techniques with reference to the FRP deck, and determine overall performance of the bridge to provide understanding of the system. The two short span prestressed concrete bridges with fiber reinforced polymer decks were subjected to four sets of nondestructive truckload testing. Strain gauges were placed along the height of the girder cross-section, and longitudinally and transversely across the bottom of the deck. Displacement transducers were placed to measure overall girder displacement, relative deck displacement, deck panel separation, and deck-girder connection separation. A three-dimensional finite element analysis model was created to replicate the performance of each bridge. The two new prestressed girders in bridge B-0171 strengthened the bridge considerably and increased its load carrying capacity. But the old prestressed girders in bridge B-0071 and bridge B-0171 did not show any sign of deterioration. The four sets of test data collected over a two-year period show that the age effect on structural behavior is very small for both the bridges. The deck had very little influence on the distribution of loads in the structure for these bridges. Due to low deck stiffness and incomplete connectivity, the FRP deck did little to strengthen the girders. The long term monitoring of the deck result complied with the short term testing as reported by Eder8. The finite element model closely matched with the structural components of the original bridge. The new improved model is a better representation as it was calibrated with four sets of field data collected over a period of two years. The field test data from both tests shows that the girders are simply supported on the abutment. But the girders in the model are designed as fixed end beams to have a reasonable value for the modulus of concrete used in the model. In reality it can be assumed that the support condition is between fixed and simply supported. It was also demonstrated that the deck had very little influence on the distribution of loads in the structure for these bridges. The majority of the load transfer between girders was most likely due to the diaphragms. The Impact Factor based on one set of experimental results was 1.217. However, for analysis the LRFD value of 1.33 was used. The Load Rating Factor for bridge B-0071 was 1.66 and for bridge B-0171 was 2.48 with the governing truck loading being the Design load Type Tandem. These rating factors were based on girder performance only due to insufficient deck information.
Author : Carlos Chastre
Publisher : Springer Nature
ISBN 13 : 3031291913
Total Pages : 498 pages
Book Rating : 4.0/5 (312 download)
Download or read book Testing and Experimentation in Civil Engineering written by Carlos Chastre and published by Springer Nature. This book was released on 2023-06-05 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the peer-reviewed selected papers presented at the 3rd International Conference on Testing and Experimentation in Civil Engineering (TEST&E 2022), held in Almada, Portugal, on June 21-23, 2022. It showcases the role of smart technologies in all civil engineering areas, such as structures and construction, geotechnics and natural resources, hydraulics and water resources, transportation and communication networks. The conference topics encompass big data and advanced data processing systems, AI applications, virtual and augmented reality, 3D modeling and printing, digital twins, automation, sensing and detection technologies, inspection, monitoring and automatic damage identification, destructive and non-destructive testing, bio, nano and new materials, disaster risk reduction and emergency management. As such the book represents an invaluable, up-to-the-minute tool, and offers an important platform to engineers and architects.
