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Load and Resistance Factor Design (LRFD) for Highway Bridge Substructures: Reference Manual and Participant Workbook.

PB2008106581

Publication Date	2001
Page Count	596
Abstract	Highway substructures (i.e., foundations and abutments) have traditionally been designed using Allowable Stress Design (ASD) methods whereas superstructure components have been designed used Load Factor Design (LFD) methods. This application of ASD for substructure design and LFD for superstructure design leads to uncertain and incompatible safety margins in the design of structure components. Solution of this problem requires a coherent method of design for the structure system. Load and Resistance Factor Design (LRFD) represents an approach in which applicable failure and serviceability conditions can be evaluated considering the uncertainties associated with loads and material resistances. Due to the differences between the substructure design process by ASD and LRFD, FHWA sponsored development of this training course to present the fundamentals of LRFD to bridge design engineers, geotechnical engineers, engineering geologists and others who are responsible for design of bridge substructures using the AASHTO LRFD Specification. This manual focuses on the geotechnical aspects of substructure design. It also is the reference manual and participant workbook for use with NHI (National Highway Institute) Course No. 132068.
Keywords	Load dynamics Resistance Bridges Design Construction materials Stresses Structural analysis Manuals Training Workbooks Load and resistance factor design(LRFD)
Source Agency	Federal Highway Administration
Corporate Authors	National Highway Inst., McLean, VA.
Supplemental Notes	See also PB97-780035.
Document Type	Technical Report
Title Note	Reference manual.
NTIS Issue Number	200811

Load and Resistance Factor Design (LRFD) for Highway Bridge Substructures: Reference Manual and Participant Workbook.

Load and Resistance Factor Design (LRFD) for Highway Bridge Substructures: Reference Manual and Participant Workbook.
PB2008106581

Publication Date	2001
Page Count	596
Abstract	Highway substructures (i.e., foundations and abutments) have traditionally been designed using Allowable Stress Design (ASD) methods whereas superstructure components have been designed used Load Factor Design (LFD) methods. This application of ASD for substructure design and LFD for superstructure design leads to uncertain and incompatible safety margins in the design of structure components. Solution of this problem requires a coherent method of design for the structure system. Load and Resistance Factor Design (LRFD) represents an approach in which applicable failure and serviceability conditions can be evaluated considering the uncertainties associated with loads and material resistances. Due to the differences between the substructure design process by ASD and LRFD, FHWA sponsored development of this training course to present the fundamentals of LRFD to bridge design engineers, geotechnical engineers, engineering geologists and others who are responsible for design of bridge substructures using the AASHTO LRFD Specification. This manual focuses on the geotechnical aspects of substructure design. It also is the reference manual and participant workbook for use with NHI (National Highway Institute) Course No. 132068.
Keywords	Load dynamics Resistance Bridges Design Construction materials Stresses Structural analysis Manuals Training Workbooks Load and resistance factor design(LRFD)
Source Agency	Federal Highway Administration
Corporate Authors	National Highway Inst., McLean, VA.
Supplemental Notes	See also PB97-780035.
Document Type	Technical Report
Title Note	Reference manual.
NTIS Issue Number	200811