Guidelines to Improve the Quality of Element-Level Bridge Inspection Data (2019) / Chapter Skim
Currently Skimming:
Pages 84-98
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 84... ...
B-1 APPENDIX B Draft Guidelines to Improve the Quality of Element-Level Bridge Inspection Data
|
From page 85... ...
B-2 CONTENTS 1 Introduction ........................................................................................................................................ B-4 1.1 Development of Element-Level Inspection ....................................................................
|
From page 86... ...
B-3 LIST OF FIGURES Figure B-1. Visual Standard for defect element 1080 – Delamination / spall / patched area.
|
From page 87... ...
B-4 1 INTRODUCTION The objective of this guideline is to improve the quality of element-level data collection for bridges on the National Highway System (NHS) with reference to the American Association of State Highway and Transportation Officials (AASHTO)
|
From page 88... ...
B-5 bridge based on certain specific elements. The AASHTO Subcommittee on Bridges and Structures (SCOBS)
|
From page 89... ...
B-6 management. To achieve these outcomes, the element-level data collected during routine bridge inspections needs to be of adequate quality to support decision-making for maintenance and repair, and support effective deterioration modeling.
|
From page 90... ...
B-7 Figure B-1 shows an example from the visual guide for defect 1080, Delamination/Spall/Patched areas with three relevant CSs, CS 1, CS 2 and CS 3. Characteristics of the typical page are shown in this figure.
|
From page 91... ...
B-8 in the guide, as well as diagrams of different crack spacing. The scaled diagrams for elements with units of sq ft represent an area 40 ft x 100 ft (4000 sq ft)
|
From page 92... ...
B-9 3.1 Relationship between Accuracy, Inspection Quality and Decision Making This portion of the guideline describes the relationship between accuracy requirements, inspection quality, and decision-making. Accuracy requirements are typically in the form of a tolerance for the inspection result, such as the total quantity of a deck assigned to CS 3 being within +/-5% of the actual quantity of deck in CS 3.
|
From page 93... ...
B-10 a mean of 30% shown in Figure B-3 (dashed line)
|
From page 94... ...
B-11 Figure B-4. Model for accuracy requirements showing different distributions of inspection results.
|
From page 95... ...
B-12 information regarding methods for testing the inspection procedure to determine if the procedure is adequate for a given accuracy requirement. These methods are also applicable for inspector training and assessment for improving the quality of element-level data.
|
From page 96... ...
B-13 3.3.1.2 Selection of Control Bridges Control bridges are normally highway bridges of common design and with common elements, such as reinforced concrete deck, steel, or concrete superstructures, etc. Factors to consider in selecting a control bridge include the following: Does the bridge represent a common bridge in the inventory?
|
From page 97... ...
B-14 level bridge inspection. The CBM can be used to calibrate contractor inspections to ensure that inspections are conducted with the suitable level of quality for a given agency.
|
From page 98... ...
B-15 References AASHTO (1997)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.