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| Total Pages | : |
| Release | : 1985 |
| Genre | : Concrete bridges |
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A survey of transverse cracking in 72 recently completed concrete bridge decks in the Piedmont region of North Carolina.
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| Total Pages | : |
| Release | : 1985 |
| Genre | : Concrete bridges |
| ISBN | : |
A survey of transverse cracking in 72 recently completed concrete bridge decks in the Piedmont region of North Carolina.
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| Publisher | : |
| Total Pages | : |
| Release | : 1985 |
| Genre | : Concrete bridges |
| ISBN | : |
A survey of transverse cracking in 72 recently completed concrete bridge decks in the piedmont region of North Carolina.
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| Total Pages | : 0 |
| Release | : 2021 |
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Transverse cracking of concrete bridge decks continues to be an issue for the Montana Department of Transportation (MDT) and is considered a common issue reported among many state departments of transportation (DOTs). In the last 25 years with the introduction of high performance concrete (HPC) in bridge decks to lower permeability and with the use of finer ground cements (to increase early age strength gain and construction schedule), the susceptibility of bridge deck cracking has increased. Cracking commonly leads to a reduction in service life and increased maintenance costs, primarily due to accelerated corrosion of reinforcing steel in the deck. Identifying the causes of bridge deck cracking and providing prevention can be complex and challenging, but is very important for maintaining longevity of the bridge deck. To assist MDT with diagnosing and mitigating the causes of transverse cracking of bridge decks, WJE implemented a multi-disciplinary approach including a literature review, field inspections, bridge deck instrumentation, laboratory evaluations, and finite element modeling (FEM). From this research, WJE found the primary causes were related to non-uniform moisture gradients, drying shrinkage, and specific winter curing procedures. Based on these findings, WJE recommended improvements to mixture proportions, construction practices, and design considerations.
| Author | : Tony R. Schmitt |
| Publisher | : |
| Total Pages | : 174 |
| Release | : 1995 |
| Genre | : Concrete bridges |
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The causes of cracking in bridge decks are investigated and procedures are recommended to alleviate the problem. Forty continuous steel girder bridges, thirty-seven composite and three noncomposite bridges are evaluated. Field surveys conducted to document cracking patterns and to determine the crack density of each bridge are described. Information collected from construction documents, field books, and weather data logs is presented and compared to the observed levels of cracking to identify correlations between cracking and the variables studied. Thirty-one variables are considered such as material properties, site conditions, construction procedures, design specifications, age of bridge and traffic volume. Based on the research reported herein, cracking in monolithic bridge decks increases with increasing values of concrete slump, percent volume of water and cement, water content, and compressive strength, and decreasing values of air content (especially below 6.0%). Bridge deck overlays placed with zero slump concrete consistently exhibit high levels of cracking. Cracking in overlays also increases as placement lengths increase. High maximum air temperatures and large changes in air temperature on the day of casting aggravate cracking in monolithic bridge decks. High average air temperatures and large changes in air temperature similarly aggravate cracking in bridge deck overlays. Both monolithic and two layer bridges with fixed-ended girders exhibit increased cracking near the abutments compared to those with pin-ended girders.
| Author | : M. Ala Saadeghvaziri |
| Publisher | : |
| Total Pages | : 206 |
| Release | : 2002 |
| Genre | : Concrete bridges |
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Many concrete bridge decks develop transverse cracking and most of these cracks develop at early ages, some right after construction and some after the bridge has been opened to traffic for a period of time. Structural design factors have not been the subject of much research in the past and they were the main thrust of this research study. Using 2-D and 3-D linear and nonlinear finite element models many design factors such as girder stiffness, deck thickness, girder spacing, relative stiffness of deck to girder, amount of reinforcements, etc., were studied. The research study also included a comprehensive review of the existing literature as well as survey of 24 bridges in the state of New Jersey. Results of each research task are presented and discussed in detail. Furthermore, based on analytical results and literature review, the effect of various factors are quantified and specific recommendations for possible consideration in design are made.
| Author | : Nigel Powers |
| Publisher | : CRC Press |
| Total Pages | : 5447 |
| Release | : 2018-07-04 |
| Genre | : Technology & Engineering |
| ISBN | : 1351745964 |
Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges contains lectures and papers presented at the Ninth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018), held in Melbourne, Australia, 9-13 July 2018. This volume consists of a book of extended abstracts and a USB card containing the full papers of 393 contributions presented at IABMAS 2018, including the T.Y. Lin Lecture, 10 Keynote Lectures, and 382 technical papers from 40 countries. The contributions presented at IABMAS 2018 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of bridge maintenance, safety, risk, management and life-cycle performance. Major topics include: new design methods, bridge codes, heavy vehicle and load models, bridge management systems, prediction of future traffic models, service life prediction, residual service life, sustainability and life-cycle assessments, maintenance strategies, bridge diagnostics, health monitoring, non-destructive testing, field testing, safety and serviceability, assessment and evaluation, damage identification, deterioration modelling, repair and retrofitting strategies, bridge reliability, fatigue and corrosion, extreme loads, advanced experimental simulations, and advanced computer simulations, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of more rational decision-making on bridge maintenance, safety, risk, management and life-cycle performance of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including students, researchers and engineers from all areas of bridge engineering.
| Author | : Paul D. Krauss |
| Publisher | : |
| Total Pages | : 136 |
| Release | : 1996 |
| Genre | : Technology & Engineering |
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| Author | : H. G. Russell |
| Publisher | : Transportation Research Board |
| Total Pages | : 188 |
| Release | : 2004 |
| Genre | : Bridges |
| ISBN | : 0309070112 |
At head of title: National Cooperative Highway Research Program.
| Author | : National Research Council (U.S.). Highway Research Board |
| Publisher | : |
| Total Pages | : 840 |
| Release | : 1987 |
| Genre | : Highway engineering |
| ISBN | : |
