Innovative Bridge Designs for Rapid Renewal Toolkit (2012) / Chapter Skim
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Pages 33-40
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From page 33... ...
31 3 SAMPLE DESIGN CALCULATIONS AND SPECIFICATIONS FOR ABC INTRODUCTION The challenge to future deployment of ABC systems lies partly in the area of being able to codify the design and construction of these prefabricated modular systems so that they are not so unique from a design and construction perspective. The LRFD design philosophy should explicitly deal with the unique aspects of large-scale prefabrication, including issues such as element interconnection, system strength, and behavior of rapid deployment systems during construction.
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From page 34... ...
32 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT Guidance has been developed for engineers alerting them of an increased obligation for strength, stability, and adequate service performance prior to final construction. Maintaining individual module stability and limiting the erection stresses induced through the choice of pick points (crane lifting points)
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From page 35... ...
33 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT • Constructability checks. Erection analysis to evaluate lifting and erection stresses in prefabricated components.
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From page 36... ...
34 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT Prefabricated modular steel bridges compete favorably with other materials when considering the greater use of shop labor in comparison to field labor, the speed at which they can be installed, and the significant reduction in time required to close a given roadway to the public. The light weight of steel modular systems could reverse this trend in ABC designs.
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From page 37... ...
35 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT Sample Design Calculation 1: Decked Steel Girder Design for ABC General: 1. Introduction 2.
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From page 39... ...
37 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT Implementing ABC concepts into the existing sections of the LRFD Bridge Construction Specifications would be difficult because these ABC concepts include elements from several sections. As such, the following is written as if it were to be added as a stand-alone section in the LRFD Bridge Construction Specifications.
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38 INNOVATIVE BRIDGE DESIGNS FOR RAPID RENEWAL: ABC TOOLKIT 9 Connections 9.1 Requirements for UHPC Joints in Decks 9.2 Requirements for Mechanical Grouted Splices 9.3 Requirements for Posttensioned Connections 9.4 Requirements for Bolted Connections 10 Erection Methods 11 Erection Procedures 11.1 General Requirements for Installation of Precast Elements and Systems 11.2 General Procedure for Superstructure Modules 11.3 General Procedure for Pier Columns and Caps 11.4 General Procedure for Abutment Stem and Wingwalls
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