NEW PROCEDURES AND CONCEPTS IN STRUCTURAL DESIGN ’08 › indot › files ›...
Transcript of NEW PROCEDURES AND CONCEPTS IN STRUCTURAL DESIGN ’08 › indot › files ›...
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NEW PROCEDURES
AND CONCEPTS
IN STRUCTURAL DESIGN ’08
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INDOTINDOT--APPROVEDAPPROVED CONCEPTSCONCEPTS
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INDOTINDOT––Approved ConceptsApproved Concepts
AASHTO Load Resistance Factor AASHTO Load Resistance Factor Design (LRFD) on LPA BridgeDesign (LRFD) on LPA Bridge
HistoricHistoric--Bridge Program UpdateBridge Program Update
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INDOTINDOT––Approved ConceptsApproved Concepts
Patching NonPatching Non--Deck ConcreteDeck Concrete
Standard Specifications forStandard Specifications for33--
and 4and 4--Sided StructuresSided Structures
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INDOTINDOT––Approved ConceptsApproved Concepts
Design Manual Part VI, Structural Design Manual Part VI, Structural Design, English UnitsDesign, English Units
Bridge LoadBridge Load--Rating AnalysisRating Analysis
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LRFD AFFECTSLRFD AFFECTS ONON
LPA BRIDGELPA BRIDGE
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LRFD Affects on LPA BridgesLRFD Affects on LPA Bridges
Design Memorandum 08Design Memorandum 08--01 01 indicates that each bridge on a indicates that each bridge on a State or local route must be State or local route must be designed in accordance with designed in accordance with LRFD.LRFD.
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LRFD Affects on LPA BridgesLRFD Affects on LPA Bridges
For a PDP project, this is For a PDP project, this is effective for the Stage 2 effective for the Stage 2 submission.submission.
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LRFD Affects on LPA BridgesLRFD Affects on LPA Bridges
For a nonFor a non--PDP project, this is PDP project, this is effective with design approval effective with design approval on or after March 18, 2008.on or after March 18, 2008.
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HISTORICHISTORIC--BRIDGEBRIDGE PROGRAM UPDATEPROGRAM UPDATE
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HistoricHistoric--Bridge Program UpdateBridge Program Update
A policy for treating a historic A policy for treating a historic bridge on a route with designbridge on a route with design--year AADT year AADT ≤≤ 400 appears as 400 appears as Design Manual Part VI, Section Design Manual Part VI, Section 7272--7.0.7.0.
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HistoricHistoric--Bridge Program UpdateBridge Program Update
The policy defines a historic The policy defines a historic bridge, and whether it is to be bridge, and whether it is to be deemed Select, or Nondeemed Select, or Non--Select.Select.
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HistoricHistoric--Bridge Program UpdateBridge Program Update
A policy for A policy for treating a historic treating a historic bridge on a route with designbridge on a route with design--year AADT year AADT > 400 is still in > 400 is still in development. Completion time is development. Completion time is uncertain.uncertain.
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PATCHINGPATCHING NONNON--DECKDECK CONCRETECONCRETE
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Patching NonPatching Non--Deck ConcreteDeck Concrete
RepointingRepointing Masonry no Masonry no longer applies to this work.longer applies to this work.A new pay item now does. A new pay item now does.
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Patching NonPatching Non--Deck ConcreteDeck Concrete
It is Patching Concrete It is Patching Concrete Structures.Structures.Std. Spec. 710 has been Std. Spec. 710 has been rewritten to indicate this. rewritten to indicate this.
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Patching NonPatching Non--Deck ConcreteDeck Concrete
WHEN EFFECTIVE ?WHEN EFFECTIVE ?INDOT letting of Sept. 6, INDOT letting of Sept. 6, 2007, as a new recurring 2007, as a new recurring special provision.special provision.
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Patching NonPatching Non--Deck ConcreteDeck Concrete
WHEN EFFECTIVE ?WHEN EFFECTIVE ?The RSP will be The RSP will be incorporated into the next incorporated into the next Standard Specifications Standard Specifications book, likely dated 2010.book, likely dated 2010.
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STANDARD STANDARD SPECIFICATIONSSPECIFICATIONS
FOR 3FOR 3-- ANDAND
44--SIDED STRUCTURESSIDED STRUCTURES
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33--
and 4and 4--Sided StructuresSided Structures
Std. Spec. 723 has been added, Std. Spec. 723 has been added, which combines all relevant which combines all relevant recurring special provisions recurring special provisions requirements.requirements.
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33--
and 4and 4--Sided StructuresSided Structures
Sec. 723 now consists of a Sec. 723 now consists of a revised recurring special revised recurring special provision which supersedes all provision which supersedes all related extant related extant recurringsrecurrings..
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33--
and 4and 4--Sided StructuresSided Structures
If a 3If a 3--sided structure of 12sided structure of 12’’ ≤≤
Span Span ≤≤
2020’’
is specified, the is specified, the contractor may substitute a 4contractor may substitute a 4--
sided structuresided structure..
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33--
and 4and 4--Sided StructuresSided Structures
The The 44--sided structuresided structure
must be must be hydraulically equivalent to hydraulically equivalent to the 3the 3--sided structure.sided structure.
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33--
and 4and 4--Sided StructuresSided Structures
The The 44--sided structuresided structure
must must complement the roadway complement the roadway geometrics for the 3geometrics for the 3--sided sided structure.structure.
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33--
and 4and 4--Sided StructuresSided Structures
The The 44--sided structuresided structure
will be will be quantified as the specifiedquantified as the specified33--sided structure.sided structure.
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33--
and 4and 4--Sided StructuresSided Structures
Only the information for the Only the information for the 33--sided structuresided structure
is to be is to be
shown on the plans.shown on the plans.
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33--
and 4and 4--Sided StructuresSided Structures
WHEN EFFECTIVE ?WHEN EFFECTIVE ?INDOT letting of Sept. 6, INDOT letting of Sept. 6, 2007, as a revised recurring 2007, as a revised recurring special provision.special provision.
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33--
and 4and 4--Sided StructuresSided Structures
WHEN EFFECTIVE ?WHEN EFFECTIVE ?The RSP will be The RSP will be incorporated into the next incorporated into the next Standard Specifications Standard Specifications book, likely dated 2010.book, likely dated 2010.
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DESIGN MANUAL PT. VI,DESIGN MANUAL PT. VI, STRUCTURAL DESIGN,STRUCTURAL DESIGN,
ENGLISH UNITSENGLISH UNITS
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Part VI, English UnitsPart VI, English Units
The same firm which developed The same firm which developed the metricthe metric--units version has units version has completed most of an completed most of an englishenglish--units version.units version.
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Part VI, English UnitsPart VI, English Units
Only the Chapter 63, Only the Chapter 63, PrestressedPrestressedConcrete, Concrete, microstationmicrostation figures, figures, are still unfinished.are still unfinished.
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Part VI, English UnitsPart VI, English Units
All other available chapters and All other available chapters and figures now available in metric figures now available in metric units have been electronically units have been electronically finalized in finalized in englishenglish
units.units.
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Part VI, English UnitsPart VI, English Units
The version has been placed The version has been placed onto the INDOT website.onto the INDOT website.
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Part VI, English UnitsPart VI, English Units
So now, once you are in Design So now, once you are in Design Manual, English Units, Part VI Manual, English Units, Part VI actually indicates something that actually indicates something that you can click on.you can click on.
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Part VI, English UnitsPart VI, English Units
A hardcopy version will be A hardcopy version will be developed for issue in 2008. developed for issue in 2008. We are still not certain as to We are still not certain as to exactly when it will be exactly when it will be available.available.
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BRIDGEBRIDGE LOADLOAD--RATINGRATING
ANALYSISANALYSIS
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Bridge LoadBridge Load--Rating AnalysisRating Analysis
Design Memorandum 08Design Memorandum 08--04 04 indicates that a submission to indicates that a submission to obtain such an analysis is obtain such an analysis is required.required.
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Bridge LoadBridge Load--Rating AnalysisRating Analysis
This applies to a new or This applies to a new or replacement bridge, or to a replacement bridge, or to a bridge to be rehabilitated.bridge to be rehabilitated.
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Bridge LoadBridge Load--Rating AnalysisRating Analysis
This applies if the bridge This applies if the bridge carries a State or localcarries a State or local--agency route.agency route.
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Bridge LoadBridge Load--Rating AnalysisRating Analysis
The procedure described in The procedure described in Design Memo 08Design Memo 08--04 has been 04 has been incorporated into the Design incorporated into the Design Manual.Manual.
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Bridge LoadBridge Load--Rating AnalysisRating Analysis
For a PDP project, this is Part II, For a PDP project, this is Part II, PDP Chapter 14, Section 14PDP Chapter 14, Section 14--2.04(08) item 13; and Section 142.04(08) item 13; and Section 14--2.05(04). 2.05(04).
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Bridge LoadBridge Load--Rating AnalysisRating Analysis
For a nonFor a non--PDP project, this is PDP project, this is Part II, nonPart II, non--PDP Chapter 14, PDP Chapter 14, Section 14Section 14--2.03(07) item 9; and 2.03(07) item 9; and Section 14Section 14--2.04(04). 2.04(04).
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CONCEPTS CONCEPTS PENDINGPENDING
INDOT APPROVALINDOT APPROVAL
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Concepts Pending INDOT ApprovalConcepts Pending INDOT Approval
SemiSemi--Integral End BentsIntegral End Bents
Standardized Bearing Devices for Standardized Bearing Devices for All Types of Structural MembersAll Types of Structural Members
New New PrestressedPrestressed--Concrete BulbConcrete Bulb--Tee SectionsTee Sections
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SEMISEMI--INTEGRALINTEGRAL END BENTSEND BENTS
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SemiSemi--Integral End BentsIntegral End Bents
This concept was reviewed by This concept was reviewed by the INDOT Standards Committee. the INDOT Standards Committee. They determined that one moreThey determined that one more--thoroughlythoroughly--explained material explained material requirement was necessary.requirement was necessary.
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SemiSemi--Integral End BentsIntegral End Bents
It is the materialIt is the materialrequired as shownrequired as shown
in the detailin the detail..
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SemiSemi--Integral End BentsIntegral End Bents
The materialThe material’’s concernss concernshave been addressed by the have been addressed by the INDOT Office of Materials INDOT Office of Materials Management.Management.
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SemiSemi--Integral End BentsIntegral End Bents
Once INDOT Structural Services Once INDOT Structural Services completes its review of Materials completes its review of Materials ManagementManagement’’s work, the concept will s work, the concept will be resubmitted for INDOT Standards be resubmitted for INDOT Standards Committee approval.Committee approval.
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SemiSemi--Integral End BentsIntegral End Bents
The Standards Committee will The Standards Committee will have sufficient information to have sufficient information to be able to approve the be able to approve the concept, ideally in spring concept, ideally in spring 2008.2008.
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STANDARDIZEDSTANDARDIZED BEARING DEVICESBEARING DEVICES
FOR ALL TYPES OFFOR ALL TYPES OF STRUCTURALSTRUCTURAL
MEMBERSMEMBERS
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Standardized Bearing DevicesStandardized Bearing Devices
Currently, only the bearing Currently, only the bearing pads for pads for prestressedprestressed--concrete concrete II--beams and box beams are beams and box beams are now standardized.now standardized.
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Standardized Bearing DevicesStandardized Bearing Devices
This proposal also This proposal also standardizes bearing devices standardizes bearing devices for for prestressedprestressed--concrete bulbconcrete bulb--tee members and structuraltee members and structural--steel members.steel members.
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Standardized Bearing DevicesStandardized Bearing Devices
Details and properties for Details and properties for newlynewly--standardized devices, standardized devices, and design guidance for and design guidance for such, have been drafted.such, have been drafted.
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Standardized Bearing DevicesStandardized Bearing Devices
We are now in process with We are now in process with determining the 2007 determining the 2007 AASHTO LRFD codeAASHTO LRFD code’’s affects s affects on the deviceson the devices’’ design design considerations.considerations.
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Standardized Bearing DevicesStandardized Bearing Devices
This review should be This review should be complete, such that the complete, such that the INDOT Standards Committee INDOT Standards Committee can approve the concept in can approve the concept in spring 2008.spring 2008.
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NEW PRESTRESSEDNEW PRESTRESSED-- CONCRETECONCRETE
BULBBULB--TEE SECTIONSTEE SECTIONS
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New BulbNew Bulb--Tee SectionsTee Sections
Four new sections haveFour new sections havebeen recommended for been recommended for consideration by theconsideration by theINDOTINDOT--ASCE Structural ASCE Structural Subcommittee.Subcommittee.
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New BulbNew Bulb--Tee SectionsTee Sections
These are (height by topThese are (height by top--flange flange width, inches) as follows:width, inches) as follows:
BT 36 x 49BT 36 x 49BT 42 x 49BT 42 x 49BT 60 x 61BT 60 x 61BT 66 x 61BT 66 x 61
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New BulbNew Bulb--Tee SectionsTee Sections
We are in process with detailing We are in process with detailing the mild reinforcement on what the mild reinforcement on what will be additional Design Manual will be additional Design Manual figures for Part VI, Chap. 63, figures for Part VI, Chap. 63, PrestressedPrestressed
Concrete.Concrete.
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New BulbNew Bulb--Tee SectionsTee Sections
Once this is complete, we will Once this is complete, we will issue a design memorandum issue a design memorandum indicating the sectionsindicating the sections’’
availability, and use availability, and use considerations.considerations.
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New BulbNew Bulb--Tee SectionsTee Sections
This is expected to beThis is expected to bein the spring of 2008.in the spring of 2008.
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New BulbNew Bulb--Tee SectionsTee Sections
And, yes, the details will be And, yes, the details will be made available in both made available in both englishenglish and metric units.and metric units.
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THATTHAT’’S IT !!S IT !!
???????????????????????????????? QUESTIONSQUESTIONS
????????????????????????????????
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NO MORENO MORE QUESTIONS ?QUESTIONS ?
GOOD !GOOD !
BREAK TIME !!BREAK TIME !!