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Introductory technical guidance for civil and structural engineers interested in design of post-tensioned highway box girders. Here is what is discussed: 1. INTRODUCTION 2. ESTABLISH BRIDGE LAYOUT 3. CROSS SECTION SELECTION 4. LONGITUDINAL ANALYSIS 5. BENDING MOMENTS 6. REQUIRED PRESTRESSING FORCE AFTER LOSSES 7. PRESTRESSING LOSSES AND TENDON SIZING FOR FINAL DESIGN (PJACK) 8. SERVICE LIMIT STATE STRESS VERIFICATIONS. 9. OPTIMIZING THE POST-TENSIONING LAYOUT.
Introductory technical guidance for civil and structural engineers interested in design of prestressed highway box girders. Here is what is discussed: 1. DESIGN 2. LONGITUDINAL DESIGN 3. MATERIALS 4. PRELIMINARY DESIGN 5. PRESTRESSING 6. PRESTRESSING LOSSES 7. SUBSTRUCTURE CONSIDERATIONS.
Introductory technical guidance for civil and structural engineers and construction managers interested in prestressing losses with post-tensioning of highway box girders. Here is what is discussed: 1. PRESTRESSING LOSSES 2. TIME-DEPENDENT LOSSES.
Introductory technical guidance for civil and structural engineers interest in design of box girder structures for bridges and highways. Here is what is discussed: 1. INTRODUCTION 2. BENDING MOMENTS CAUSED BY UNIT EFFECTS 3. DEAD LOAD—DC (SELF WEIGHT AND BARRIER RAILING) 4. DEAD LOAD—DW (FUTURE WEARING SURFACE) 5. LIVE LOAD—LL (LANE AND TRUCK COMPONENTS) 6. POST-TENSIONING SECONDARY MOMENTS—UNIT PRESTRESSING FORCE. 7. THERMAL GRADIENT (TG)—20°F LINEAR. 8. MOMENTS RESULTING FROM TEMPERATURE RISE AND FALL 9. MOMENTS RESULTING FROM CONCRETE SHRINKAGE 10. MOMENTS RESULTING FROM CONCRETE CREEP 11. BENDING MOMENTS SUMMARIES 12. POST-TENSIONING FORCE COMPARISON (AFTER ALL LOSSES, WITH THERMAL EFFECTS).
Introductory technical guidance for civil engineers, highway engineers and other professional engineers and construction managers interested in design and construction of prestressed post-tensioned box girders for bridge and highway construction. Here is what is discussed: 1. INTRODUCTION, 2. CROSS SECTION PROPERTIES AND SIGN CONVENTION, 3. STRESS SUMMARIES IN A PRESTRESSED BEAM, 4. SELECTION OF PRESTRESSING FORCE FOR A GIVEN ECCENTRICITY, 5. PERMISSIBLE ECCENTRICITIES FOR A GIVEN PRESTRESSING FORCE, 6. EQUIVALENT FORCES DUE TO POST-TENSIONING AND LOAD BALANCING, 7. POST-TENSIONING IN CONTINUOUS GIRDERS, 8. TENDON PROFILES—PARABOLIC SEGMENTS.
Introductory technical guidance for civil and structural engineers and construction managers interested in design and construction of box girders for highway and bridge structures. Here is what is discussed: 1. INTRODUCTION 2. CROSS SECTION PROPERTIES AND SIGN CONVENTION 3. STRESS SUMMARIES IN A PRESTRESSED BEAM 4. SELECTION OF PRESTRESSING FORCE FOR A GIVEN ECCENTRICITY 5. PERMISSIBLE ECCENTRICITIES FOR A GIVEN PRESTRESSING FORCE 6. EQUIVALENT FORCES DUE TO POST-TENSIONING AND LOAD BALANCING 7. POST-TENSIONING IN CONTINUOUS GIRDERS 8. TENDON PROFILES—PARABOLIC SEGMENTS.
This text provides an introduction to the theory and practice of designing modern highway bridge superstructures. Beginning with the history of bridges, it describes various types of bridge superstructures, materials of construction, bridge loadings, and analysis techniques for various types.
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).
Over 150 papers representing the most recent international research findings on steel and composite structures. Including steel constructions; buckling and stability; codes; composite; control; fatigue and fracture; fire; impact; joints; maintenance; plates and shells; retrofitting; seismic; space structures; steel; structural analysis; structural components and assemblies; thin-walled structures; vibrations, and wind. A special session is dedicated on codification. A valuable source of information to researchers and practitioners in the field of steel and composite structures.
The Proceedings of the NATO Advanced Study Institute on Analysis and Design of Bridges held at ~e§me, lzmir, Turkey from 28 June 1982 to 9 July 1982 are contained in the present volume. The Advanced Study Institute was attended by 37 lecturers and participants from 10 different countries. The Organizing Committee consisted of Professors P. Gtilkan, A. C. Scordelis, S. T. Wasti and 9. Yl. lmaz. The guidelines set by NATO for the Advanced Study Institute require it to serve not only as an efficient forum for the dissemination of available advanced knowledge to a selected group of qualified people but also as a platform for the exploration of future research possibilities in the scientific or engineering areas concerned. The main topics covered by the present Advanced Study Institute were the mathematical modelling of bridges for better analysis and the scientific assessment of bridge behaviour for the introduction of improved design procedures. It has been our observation that as a result of the range and depth of the lectures presented and the many informal discussions that took place, ideas became fissile, the stimulus never flagged and many gaps in the engineering knowledge of the participants were "bridged". Here we particularly wish to mention that valuable informal presenta tions of research work were made during the course of the Institute by Drs. Friedrich, Karaesmen, Lamas and Parker.