Author: Ariel RubinPublisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 376
Book Description
Strengthening of Reinforced Concrete Bridge Decks with Carbon Fiber Composites
Author: Ariel RubinPublisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 376
Book Description
Monitoring and Service Life Estimation of Reinforced Concrete Bridge Decks Rehabilitated with Externally Bonded Carbon Fiber Reinforced Polymer (CFRP) Composites
Author: Luke Soo-won LeeDevelopment of Composite Renewal Systems for Rapid Rehabilitation and Construction of Bridge Decks
Author: Anna Beth PridmorePublisher:
ISBN:
Category :
Languages : en
Pages : 379
Book Description
The deterioration of steel in aging reinforced concrete bridges is a continual problem which could benefit from improved rehabilitation techniques that take advantage of enhanced and more durable materials such as fiber reinforced polymer (FRP) composites. Appropriately designed hybrid material systems benefit from the performance and durability advantages of FRP materials yet remain more cost effective than comparable all-composite systems. Development of rapid rehabilitation systems for the decks of concrete box girder bridges, which are increasingly common throughout the United States, is presented. One goal of this research is to assess and validate the use of FRP composite panels for use as both stay-in-place formwork and as the bottom longitudinal and transverse reinforcement in the deck of concrete box girder bridges. Performance assessments for full-scale two-cell box girder bridge specimens through monotonic and extensive cyclic loading provided validation for the FRP panel system bridge deck as a viable rehabilitation solution for box girder bridge decks. The FRP panel system performed comparably to a conventionally reinforced concrete bridge deck in terms of serviceability, deflection profiles, and system level structural interaction and performed superior to the RC bridge deck in terms of residual deflections, and structural response under cyclic loading. Assessment of a damaged FRP panel bridge deck system, which was repaired using a resin injection technique, showed superior performance for the repaired system in terms of integrity of the FRP panel interface and cyclic response. Rapid rehabilitation techniques for strengthening reinforced concrete box girder bridge deck overhangs using near-surface-mounted (NSM) carbon fiber reinforced polymer (CFRP) were also evaluated. Analytical predictions of load carrying capacity and deflections provided correlation with experimental results, and the developed analysis methods provide an effective design tool for future research. Results from the laboratory testing of a bridge deck overhang strengthened with FRP showed significant increases in load carrying capacity as well as deformation capacity as compared to the as-built specimen without FRP. This research provides enhanced understanding of hybrid structures and indicates significant potential for rehabilitation applications to concrete box girder bridges.
Application of Fiber Reinforced Polymer Composites to the Highway Infrastructure
Author: Dennis R. MertzPublisher: Transportation Research Board
ISBN: 0309087694
Category : Political Science
Languages : en
Pages : 88
Book Description
Rising awareness of and increased attention to sexual harassment has resulted in momentum to implement sexual harassment prevention efforts in higher education institutions. Work on preventing sexual harassment is an area that has recently garnered a lot of attention, especially around education and programs that go beyond the standard anti-sexual harassment trainings often used to comply with legal requirements. On April 20-21, 2021, the National Academies of Sciences, Engineering, and Medicine hosted the workshop Developing Evaluation Metrics for Sexual Harassment Prevention Efforts. The workshop explored approaches and strategies for evaluating and measuring the effectiveness of sexual harassment interventions being implemented at higher education institutions and research and training sites, in order to assist institutions in transforming promising ideas into evidence-based best practices. Workshop participants also addressed methods, metrics, and measures that could be used to evaluate sexual harassment prevention efforts that lead to change in the organizational climate and culture and/or a change in behavior among community members. This publication summarizes the presentations and discussion of the workshop.
Strengthening Reinforced Concrete Bridges Using Carbon Fiber Reinforced Polymer Composites
Author: Sergio Francisco BreñaStrengthening of Concrete Bridge Decks Using Carbon-based Composite Materials
Author: Daniel Lange KuemmerlePublisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 494
Book Description
Advanced Composites in Bridge Construction and Repair
Author: Yail Jimmy KimPublisher: Elsevier
ISBN: 0857097016
Category : Technology & Engineering
Languages : en
Pages : 367
Book Description
Advanced composite materials for bridge structures are recognized as a promising alternative to conventional construction materials such as steel. After an introductory overview and an assessment of the characteristics of bonds between composites and quasi-brittle structures, Advanced Composites in Bridge Construction and Repair reviews the use of advanced composites in the design and construction of bridges, including damage identification and the use of large rupture strain fiber-reinforced polymer (FRP) composites. The second part of the book presents key applications of FRP composites in bridge construction and repair, including the use of all-composite superstructures for accelerated bridge construction, engineered cementitious composites for bridge decks, carbon fiber-reinforced polymer composites for cable-stayed bridges and for repair of deteriorated bridge substructures, and finally the use of FRP composites in the sustainable replacement of ageing bridge superstructures. Advanced Composites in Bridge Construction and Repair is a technical guide for engineering professionals requiring an understanding of the use of composite materials in bridge construction. Reviews key applications of fiber-reinforced polymer (FRP) composites in bridge construction and repair Summarizes key recent research in the suitability of advanced composite materials for bridge structures as an alternative to conventional construction materials
Experimental and Analytical Study of Fiber Reinforced Polymer (FRP) Grid-reinforced Concrete Bridge Decking
Author: David A. JacobsonField Applications of FRP Reinforcement
Author: S. H. RizkallaPublisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 452
Book Description
.".. papers presented at the ACI Fall 2003 Convention, in Boston, Massachusetts"--P. iii.
Design and Environmental Performance of Near-surface Mounted Carbon Fiber Reinforced Polymer Strips for Shear Strengthening Reinforced Concrete Bridge Girders
Author: Jacob Hans GoebelPublisher:
ISBN:
Category :
Languages : en
Pages : 209
Book Description
During the interstate expansion of the 1950s, many conventionally reinforced concrete deck girder bridges were built throughout the country. These now vintage bridges commonly exhibit diagonal cracking and rate inadequately for shear, thus they are candidates for shear strengthening to extend their useful life. Near-surface mounted (NSM) retrofitting is a promising new strengthening technique, but limited test data are available for carbon fiber reinforced polymer (CFRP) in shear strengthening making the long-term durability of NSM-CFRP unknown. This paper provides experimental results from realistic full-scale specimens strengthened with NSM-CFRP. Specimens were tested for shear strength and subjected to environmental exposures to assess long-term durability. Small cylinder specimens were tested to investigate relative performance of different adhesives on bond strength under different environmental exposures. Test results provide a better understanding of the NSM-CFRP shear behavior and strength. Recommendations for shear strength design with NSM-CFRP are made.