This workbook is a companion to the volume Fracture Mechanics for Bridge Design which provides an introduction to the elements of fracture mechanics for bridge design. Fracture mechanics are introduced and used as the basis for understanding fatigue and fracture in bridge structures. Various applications are cited.
Comprehensive procedures for the structural design of "zero-maintenance" plain jointed concrete pavements for heavily trafficked roadways are development. The term "zero-maintenance" refers to the structural adequacy of the pavement lanes and shoulder. Thus, a "zero-maintenance" pavement would not require maintenance such as patching, joint repair,
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This manual is an engineering guide for the design of heavily trafficked plain jointed concrete pavements to provide "zero-maintenance" performance over a selected design period. The term "zero-maintenance" refers only to structural maintenance such as patching, crack repair, slab replacement, grinding of faults, and overlay. Procedures are include
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A State-by-State assessment is made of the current status of the National Small Rural Watersheds Program with regard to adequacy of data collection and analysis. Methodology is recommended for flood frequency estimation to replace currently used biased approaches. Concepts of risk aversion are discussed, and decision criteria based on economic cons
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A State-by-State assessment is made of the current status of the National Small Rural Watersheds Program with regard to adequacy of Data collection and analysis. Methodology is recommended for flood frequency estimation to replace currently used biased approaches. Concepts of risk aversion are discussed, and decision criteria based on economic cons
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The essence of this research is the search for more economical grouts not directly dependent on petroleum. The study has required an extensive investigation of 75 years of knowledge on chemical grouts in order to clear out the present diaspora of products. From this a general classification of chemical grouts has been proposed based on the nature o
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The essence of this research is the search for more economical grouts not directly dependent on petroleum. The study has required an extensive investigation of 75 years of knowledge on chemical grouts in order to clear out the present diaspora of products. From this, a general classification of chemical grouts has been proposed, based on the nature
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This report concludes an evaluation of expedient methodology for identifying and qualitatively classifying potentially expansive soils. Seventeen published techniques used for identification/classification purposes were reviewed and evaluated using data collected from an extensive laboratory testing program. A definition of potential swell that is
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This article describes the results of a comprehensive experiment dealing with speed control and driver behavior when approaching and driving through small town speed zones on a high-speed, rural, two-lane highway. The basic objective of the experiment was to develop safe practical traffic control devices which alert drivers to the need for speed re
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A State-by-State assessment is made of the current status of the National Small Rural Watersheds Program with regard to adequacy of data collection and analysis. Methodology is recommended for flood frequency estimation to replace currently used biased approaches. Concepts of risk aversion are discussed, and decision criteria based on economic cons
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The report includes results of two studies of construction zone traffic control. The first study involved analysis of traffic accidents occurring in 79 zones in seven states. Results indicate a before to during accident rate increase of 6.8%. Results also include breakdowns by accident types, severity, light conditions, roadway type, area type, wor
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Eleven drain inlet grates were tested to evaluate their safety characteristics for bicycle as well as pedestrian traffic. Four of the grates that rated highest were selected for hydraulic testing. Three other grates with designs and bar spacings similar to grates proven safe were also selected for hydraulic testing. Test results show that two of th
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Porus woven and non-woven fabrics have been used in road construction in Region 6 since 1974. The fabrics have been used: 1) as filters for surface drainage; 2) separation layers to prevent subgrade soil contamination of base layers; 3) subgrade restraining layers for weak subgrades; 4) earth reinforcement to build retaining walls; 5) erosion contr
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Applications of the Community Aggregate Planning Model; The Effect of Yielding on the Fatigue Strength of Steel Beams; Studies of the Road Marking Code; Evaluation of Speed Control Signs for Small Rural Towns; Improved Freeway Incident Detection Algorithm
A broad spectrum of materials which may have potential for improving the characteristics of pavements with regard to reducing future maintenance were reviewed with those materials or materials systems possessing the most advantages being considered as candidates for a zero maintenance paving system. These included Gussasphalt, asbestos asphalts, su
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A broad spectrum of materials which may have potential for improving the characteristics of pavements with regard to reducing future maintenance were reviewed with those materials or materials systems possessing the most advantages being considered as candidates for a zero maintenance paving system. These included Gussasphalt, asbestos asphalts, su
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The mechanical response of soil may be characterized as stiff, transition, or fluid, depending upon its consistency at various moisture contents. This program was charged with the development of test method and hardware not having the disadvantages of traditional plasticity tests. In particular, the test method should not require removal of aggrega
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This study showed that lime treatment removes polar, viscosity-building components and reduces the susceptibility of the asphalt to laboratory oxidative hardening. The beneficial effects of lime treatment in reducing asphalt oxidative hardening were attributed to two synergistic effects: (1) lime reduces the formation of oxidation products by the r
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