Bridges for Service Life Beyond 100 Years: Service Limit State Design (2014) / Chapter Skim
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Pages 292-303
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292 A p p e n d i x B SHRP 2 R19B Survey of Bridge Owners
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293 Questionnaire #1 Summary of Experience with Service Issues Your Name and Title: Your Phone Number and Email Address: Please address the following questions as they relate to summarizing your experience by material type, structure type and subsystem, component and element type. The following are possible examples of these various features: • Material Type: steel, plain concrete, reinforced concrete, prestressed concrete, etc.
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294 Questionnaire #2 Geotechnical Service Issues ForM For BrIdGE MovEMEnTS and oBSErvEd dISTrESS 1. Preparer Information (fill one form per structure)
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295 5. Bridge Movements (horizontal movements are movements in longitudinal direction of bridge)
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296 agency's Tolerable Movement Criteria for new Bridge Structures 1. Article C10.5.5.2 of AASHTO (2007)
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297 response to Questionnaire 1 on Superstructure Issues Question 1: What are the five or ten most costly maintenance/ durability items in your structural maintenance budget? The most costly maintenance/durability items within the structural maintenance budget as reported in the survey responses are: • Expansion joints and steel coating systems (13 each)
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298 joints was a common response, which may be related to many of the other issues mentioned. As would be expected, the chloride penetration and "ADT and salt" categories were focused in the northern part of the country where winter weather conditions require the use of salt for traffic safety.
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299 b. Have you been able to quantify the rate of reduced serviceability or service life?
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300 Table B.1. Bridge Characteristics, Geological Information, and Movements Question 1: Preparer Assistant Geotechnical Engineer (State A)
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301 Table B.1. Bridge Characteristics, Geological Information, and Movements Question 3: Construction Sequence Substructure, Approach Fill/ Wall, Superstructure Substructure, Approach Fill/ Wall, Superstructure Substructure, Approach Fill/ Wall, Superstructure Substructure, Approach Fill/ Wall, Superstructure Approach Fill/ Wall, Substructure, Superstructure Question 4: Geological Info Alluvial and residual clay overlying sand or shale bedrock Glacial drift and alluvial soils over glacial till followed by Pennsylvanian bedrock Residual clay soil over Pennsylvanian bedrock Loessial soil and fill above alluvial sand Stiff to hard sandy clay (Liquid Limit (LL)
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302 Table B.2. Effects of Movement on Structure State B Damage to abutments: NO, settlement resulted in end span cantilevered from pier, loss of bearing Damage to piers: Vertical Displacement: NO, shims added, caused crack to form over pier Horizontal Displacement: Distress in superstructure: NO, crack/hinge over pier Damage to railings, curbs, sidewalks or parapets: NO, cracks in parapet Damage to bearings: NO Poor riding quality: NO Not given or corrected: NA None: NA Other: After hinge/crack in slab span, end span acted as simply supported.
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303 Table B.3. Allowable Vertical and Horizontal Movements Movement Agency A Agency B Agency C Agency D Agency E Agency F Agency G Total Vertical Movement Axial Elastic Only 1″ Assessed on a case by case basis, and if likely to continue steps are taken to stop settlement.
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