The Agricultural BMP Database - A Growing Repository of Field Performance Data

2016 ◽  
Keyword(s):  
Field Performance ◽  
Performance Data

Method for estimating the wells interference using field performance data

2018 ◽  
pp. 64-69 ◽  
Author(s):  
E.V. Yudin ◽  
◽  
A.E. Gubanova ◽  
V.A. Krasnov ◽  
◽  
...  
Keyword(s):  
Field Performance ◽  
Performance Data

A Comprehensive Treatise of the High Temperature Specification Parameter |G*|/(1-(1/tanδsinδ)) for Performance Grading of Asphalts

2004 ◽  
Vol 14 (6) ◽  
pp. 303-314 ◽  
Author(s):  
Aroon Shenoy
Keyword(s):  
High Temperature ◽  
Field Performance ◽  
Performance Data ◽  
Asphalt Binders ◽  
Theoretical Derivation ◽  
Comprehensive Treatise ◽  
Actual Field ◽  
Rutting Behavior ◽  
Performance Grading ◽  
Unrecovered Strain

Abstract The term |G*|/(1-(1/tanδ sinδ)) has been suggested as one of the best candidates for the replacement of the Super-pave specification parameter |G*|/sinδ, which has been found to be inadequate in rating polymer-modified binders for high temperature performance grading. This refinement of the Superpave specification parameter evolved through a theoretical derivation based on fundamental concepts. It was shown to be more sensitive to the variations in the phase angle δ than the original Superpave specification parameter. It thus described the unrecovered strain in the asphalt binders more accurately, and hence related to actual field performance data. This article provides a comprehensive treatise of the parameter |G*|/(1-(1/tanδ sinδ)) giving details of its derivation, salient features that are attributed to its success, comparison with actual field performance data for validation and a one-on-one comparison with the existing parameter |G*|/sinδ. It is shown that for all available field data, the parameter |G*|/(1-(1/tanδ sinδ)) does a better job in correlating with the rutting behavior than the parameter |G*|/sinδ for unmodified as well as modified asphalts. Since it is obtained in the same manner as the parameter |G*|/sinδ through the determination of |G*| and δ from a stress-controlled or strain-controlled dynamic shear rheometer, it means that no retraining of technicians and staff is required and implementation for the use of this parameter is immediate, thereby saving enormous amount of time and money. This parameter has the further advantage of being in a form easily adaptable to modeling, and thereby directly applicable for pavement design purposes.

Dynamic Field Performance of Glued Laminated Timber Bridges

2005 ◽  
Vol 1928 (1) ◽  
pp. 154-164
Author(s):  
Jake Bigelow ◽  
Brent Phares ◽  
Terry Wipf ◽  
Mike Ritter ◽  
Doug Wood
Keyword(s):  
Dynamic Load ◽  
Dynamic Performance ◽  
Field Performance ◽  
Performance Data ◽  
Girder Bridges ◽  
Dynamic Field ◽  
Dynamic Load Allowance ◽  
Glued Laminated Timber ◽  
National Programs ◽  
Timber Bridges

To use and develop timber structures in transportation better, the U.S. government implemented several national programs starting in the early 1990s to address the needs of the timber industry. One need was to investigate the dynamic field performance of timber bridges in relation to vehicular loading. The AASHTO load and resistance factor design specifications recommend a dynamic load allowance of 0.165 for timber bridges. To investigate this codified value, research was needed to determine the dynamic characteristics of timber bridges and to study their dynamic performance. To obtain dynamic performance data, five glued laminated girder bridges and four longitudinal glued laminated panel bridges were selected for testing. The testing involved loading the nine structures to obtain dynamic performance data including deflection and acceleration, as well as to assess the overall condition state of the bridges. The nine bridges tested were found to have fundamental frequencies between 5 Hz and 11 Hz as well as a dynamic load allowance of less than 0.25. The bridges found to have dynamic amplifications above specified code values were also found to have physical characteristics (i.e., rough entrances) that likely caused the higher dynamic amplification values.

Pay Factors Based on Observed Field-Performance Data

2016 ◽  
Vol 142 (5) ◽  
pp. 04016016
Author(s):  
Prasad Buddhavarapu ◽  
Jorge A. Prozzi ◽  
Andre de Fortier Smit
Keyword(s):  
Field Performance ◽  
Performance Data
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