scholarly journals Statistical analysis of existing models for flexural strengthening of concrete bridge beams using FRP sheets

2012 ◽  
Vol 27 (1) ◽  
pp. 490-520 ◽  
Author(s):  
Alfredo M. Ceci ◽  
Joan R. Casas ◽  
Michel Ghosn
Keyword(s):  
Statistical Analysis ◽  
Concrete Bridge ◽  
Flexural Strengthening ◽  
Bridge Beams

Chloride Testing of 27-Vear-Old Prestressed Concrete Bridge Beams

PCI Journal ◽  
1992 ◽  
Vol 37 (5) ◽  
pp. 68-79 ◽  
Author(s):  
Valerie E. Murray ◽  
Gregory C. Frantz
Keyword(s):  
Prestressed Concrete ◽  
Concrete Bridge ◽  
Bridge Beams ◽  
Prestressed Concrete Bridge

GPR detection of voids in post-tensioned concrete bridge beams

2002 ◽  
Author(s):  
Antonios Giannopoulos ◽  
Paul Macintyre ◽  
Scott Rodgers ◽  
Mike C. Forde
Keyword(s):  
Concrete Bridge ◽  
Bridge Beams ◽  
Post Tensioned

Design norms and live load development by the example of saint petersburg depot of reinforced concrete automobile road bridges

2018 ◽  
pp. 344-357
Author(s):  
Andrei Belyi ◽  
Eduard Karapetov ◽  
Ekaterina Tsygankova
Keyword(s):  
Reinforced Concrete ◽  
Statistical Analysis ◽  
Highway Bridges ◽  
Concrete Bridge ◽  
Live Load ◽  
Design Standards ◽  
Saint Petersburg ◽  
Reinforced Concrete Bridge ◽  
Standard Design ◽  
The City

Objective: To analyze and cover the statistical data concerning the development and application of live load and relevant design standards by the example of Saint Petersburg bridge constructions. Methods: A comprehensive three-stage analysis of technical documentation on the operated reinforced concrete bridge constructions of the city was applied. Historical and technical review of norms and specifications of design, since the end of the 19th century was conducted. Systematization, statistical analysis and splitting into stages and groups were carried out. Results: The article presents the development of design standards and temporary loads of reinforced concrete highway bridges. The statistics is made on the basis of the depot of Saint Petersburg bridges. The latter is characterized by the increased esthetic, and difficult technical operation features. Classification of temporary loads on structures of Saint Petersburg since 1891 was carried out. The stages of occurrence and formation of circulating load norms were analyzed. A certain feature in regulation of requirements for urban bridges was singled out. Examples of the relevant objects were given. A number of conclusions concerning the evolution of design standards were made. Practical importance: Taking into account the specifi city of the large megalopolis, management of technical condition of bridge constructions in Saint Petersburg represents an extremely responsible and difficult task. Authentic, exact and relevant data on the history of design of facilities, circulating load (both design and current) is necessary for the solution of the task in question. Statistical analysis was carried out to apply operation of reinforced concrete bridge constructions in practice as the most mass transportation facilities of the city. From a practical point of view the data in question will make it possible to provide and support the set standard (design) levels of reliability, safety and durability of bridge constructions with a sufficient share of probability.

Flexural strengthening of precast reinforced concrete bridge girders using bonded carbon fibre reinforced polymer strips or external post-tensioning

2004 ◽  
Vol 31 (3) ◽  
pp. 499-512 ◽  
Author(s):  
Ezzeldin Y Sayed-Ahmed ◽  
Amr H Riad ◽  
Nigel G Shrive
Keyword(s):  
Reinforced Concrete ◽  
Bridge Girders ◽  
Concrete Bridge ◽  
Flexural Strengthening ◽  
Reinforced Concrete Bridge ◽  
Concrete Girders ◽  
Reinforced Polymer ◽  
External Prestressing ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

Strengthening of reinforced concrete bridge girders has become a major concern. Many reinforced concrete highway bridges were constructed in Canada using precast reinforced concrete girders, and currently many of them need rehabilitation. Thus, two techniques for flexural strengthening of precast reinforced concrete bridge girders (HC-type) were investigated experimentally. The first technique involved bonding carbon fibre reinforced polymer (CFRP) strips to the soffits of the girders. The second technique was classical external post-tensioning with steel bars. A simple, yet innovative method was developed for applying the external prestressing to these girders. The experimental investigation was performed on full-scale girders from a dismantled bridge in Alberta (Canada). Outcomes of the experimental investigation led to the conclusion that classical methods of flexural strengthening (e.g., external prestressing) should not be completely disregarded. Also, an additional mode of failure needs to be added to currently available prediction models for estimating the gain in flexural strength of reinforced concrete girders retrofitted using bonded CFRP strips.Key words: bridges, CFRP, flexure strengthening, precast girders, post tension, prestressing, rehabilitation.

scholarly journals Repair and Strengthening of Bridges in Indiana Using Fiber Reinforced Polymer Systems: Volume 2–FRP Flexural Strengthening and End Region Repair Experimental Programs

2021 ◽  
Author(s):  
William B. Rich ◽  
Robert R. Jacobs ◽  
Christopher S. Williams ◽  
Robert J. Frosch
Keyword(s):  
Effective Means ◽  
The State ◽  
Concrete Bridges ◽  
Fiber Reinforced Polymer ◽  
Experimental Program ◽  
Concrete Bridge ◽  
Fiber Reinforced ◽  
Near Surface ◽  
Flexural Strengthening ◽  
Reinforced Polymer

For bridges that are experiencing deterioration, action is needed to ensure the structural performance is adequate for the demands imposed. Innovate repair and strengthening techniques can provide a cost-effective means to efficiently and safely extend the service lives of bridges. The use of fiber reinforced polymer (FRP) systems for the repair and strengthening of concrete bridges is increasing in popularity. Recognizing the potential benefits of the widespread use of FRP, a research project was initiated to determine the most appropriate applications of FRP in Indiana and provide recommendations for the use of FRP in the state for the repair and strengthening of bridges. The details of the research are presented in two volumes. Volume 1 provides the details of a study conducted to (i) summarize the state-of-the-art for the application of FRP to concrete bridges, (ii) identify successful examples of FRP implementation for concrete bridges in the literature and examine past applications of FRP in Indiana through case studies, and (iii) better understand FRP usage and installation procedures in the Midwest and Indiana through industry surveys. Volume 2 presents two experimental programs that were conducted to develop and evaluate various repair and strengthening methodologies used to restore the performance of deteriorated concrete bridge beams. The first program investigated FRP flexural strengthening methods, with focus placed on adjacent box beam bridges. The second experimental program examined potential techniques for repairing deteriorated end regions of prestressed concrete bridge girders. Externally bonded FRP and near-surface-mounted (NSM) FRP were considered in both programs.

Evaluation of Effective Prestress Force in 28-Year-Old Prestressed Concrete Bridge Beams

PCI Journal ◽  
1996 ◽  
Vol 41 (6) ◽  
pp. 78-89 ◽  
Author(s):  
Stephen Pessiki ◽  
Mark Kaczinski ◽  
Herbert H. Wescott
Keyword(s):  
Prestressed Concrete ◽  
Concrete Bridge ◽  
Bridge Beams ◽  
Prestressed Concrete Bridge
Sign in / Sign up

Export Citation Format

Share Document