CIVE1173 Condition Monitoring on Site

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Author:
higgsboson
ID:
224441
Filename:
CIVE1173 Condition Monitoring on Site
Updated:
2013-06-20 09:56:56
Tags:
Condition Monitoring Site
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Description:
Week 3 lecture notes summary. Exam
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  1. Condition Assessment - Procedures
    • Read Reports & discuss with Client
    • Get background information
    • Identify requirements for initial site visit
    • Initial Site Visit
    • Visual Inspection
    • Photographs and sketches
    • Identify areas of interest and additional data required
    • Identify test locations and equipment /personnel required
    • Issue report (if required)
    • Detailed Site Inspections (if required)
  2. Site investigation - Preparation
    • - reason for assessment
    • Testing
    • - Initial inspection (Visual/Delamination survey: Tape measure, steel ruler, crack gauge, brush/scraper, hammer, chisel. Camera, batteries, binoculars, torch.  Other rudimentary accoutrements to make
    • records)
    • - Detailed inspection (Cover, half-cell,
    • resistivity, corrosion rate)
    • Personnel
    • Access
    • OH&S / PPE
    • Site induction
    • JSA
    • Work Method Statements (based on JSA)
  3. Visual Inspections
    • Cracks (corrosion, casting (crazing, plastic & drying shrinkage, thermal), ASR, loading (increasing, repetitive, pooor design, washout), impact).
    • Cracks <0.3mm can autogenously heal but may provide access for corrosive substances.
    • Rust staining
    • Spalling
    • Delamination (debonded but not yet spalled, hollow sounding)
    • Poor workmanship (low cover, poor compaction, QA, &/or design)
    • Design (durability assessment (environmental exposure & loading), materials selection
    • Water leaks/damage
    • Poor quality repairs
    • Other damage
    • Causes
  4. Interpreting visual data
    • Single structure
    • Network of structures; single owner or similar structures with many owners
  5. Condition Assessment System
    • Collect Data
    • Record Data
    • Evaluate Data; rating system, algorithm, experience
    • Recommendations; individual structures, network of structures
    • Store Data
    • Prioritisation of structures for inspection /assessment
    • Categorisation of component parts;
    •  Break down network to individual structures,
    •  Piers, abutments, bridge deck, etc
    • Categorisation of vulnerability of structure and it’s components
    • Categorisation of extent and severity of deterioration and structural adequacy
    • Rating of structure
  6. Level of Inspection
    • Routine; set period (1-5 years), visual, installed monitoring
    • Detailed; set period (5-10 years), defects from routine, standard NDT
    • Specialist; defects from detailed, specialist equipment
  7. Rating Systems
    • Routine and visual inspections
    • Generally based on 4 or 5 levels
    • Further testing and repair triggered when higher levels are reached
    • Generally reactive rather than proactive
    • Requires experienced personnel (subjective decisions)
  8. Rating tables
    • - visual inspection
    • - extent and severity
    • - detailed inspection
    • - structural inspection

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