Proposed Design of Internally Redundant Steel Box Straddle Caps

Zecchin, Esteban; Williams, Emma; Liang, Chen; Helwig, Todd; Engelhardt, Michael; Williamson, Eric; Hebdon, Matthew

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Proposed Design of Internally Redundant Steel Box Straddle Caps

2025-01-01
By Zecchin, Esteban ; Williams, Emma ; Liang, Chen

File Language:

English

[PDF - 20.09 MB]

Details

Creators:

Zecchin, Esteban ; Williams, Emma ; Liang, Chen ; Helwig, Todd ; Engelhardt, Michael ; Williamson, Eric ; Hebdon, Matthew
Corporate Creators:

University of Texas at Austin. Center for Transportation Research
Corporate Contributors:

Texas Department of Transportation. Research and Technology Implementation Office ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA/TX-24/0-7012-1
Resource Type:

Tech Report
Geographical Coverage:

Texas;United States
Edition:

Technical Report August 2019 - May 2023
Corporate Publisher:

University of Texas at Austin. Center for Transportation Research
Abstract:

Steel box straddle caps are classified as Fracture Critical Members, requiring stringent design, fabrication, and in-service inspections to comply with the provisions of the Fracture Control Plan. Providing internal redundancy to steel box straddle caps to remove the Fracture Critical inspection requirements is highly desirable. The research conducted explores two possible approaches to provide internal redundancy to steel box straddle caps by (i) adding high-strength bars as a secondary tensile element and (ii) providing cross-boundary fracture resistance between the components in tension. A full-scale experimental program was conducted and complemented with finite element modeling. The results of these studies are discussed, and design recommendations and examples are provided.
Format:

PDF
Funding:

0-7012
Download URL:

https://rosap.ntl.bts.gov/view/dot/79615/dot_79615_DS1.pdf
File Type:

[PDF - 20.09 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:a41080f94d417160514bd55ac5c84781702e8ae8919048d23ab0b0c3aeeb6b49024bc5be362bb5b1671a331fc19d311187442d04054a4487c76255747cfa110b

File Language:

English

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