Approach Guardrail Transition Retrofit to Existing Buttresses & Bridge Rails

Rosenbaugh, Scott K.; Fang, Chen; Bielenberg, Robert W.; Faller, Ronald K.; Stolle, Cody S.; Midwest Roadside Safety Facility; Nebraska Transportation Center; University of Nebraska-Lincoln

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Approach Guardrail Transition Retrofit to Existing Buttresses & Bridge Rails

2024-05-15
By Rosenbaugh, Scott K. ; Fang, Chen ; Bielenberg, Robert W. ; ...

[PDF-4.41 MB]

English

Details You May Also Like

Details:

Creators:

Rosenbaugh, Scott K. ; Fang, Chen ; Bielenberg, Robert W. ; Faller, Ronald K. ; Stolle, Cody S.

Rosenbaugh, Scott K. ; Fang, Chen ; Bielenberg, Robert W. ; Faller, Ronald K. ; Stolle, Cody S. Less -
Corporate Creators:

Midwest Roadside Safety Facility ; Nebraska Transportation Center ; University of Nebraska-Lincoln

Midwest Roadside Safety Facility ; Nebraska Transportation Center ; University of Nebraska-Lincoln Less -
Corporate Contributors:

Nebraska. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration

Nebraska. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration Less -
Subject/TRT Terms:

[+]

Approach Guardrail Transition Computer Simulation Crash Tests Guardrail Transition Sections Highway Safety MASH 2016 Retrofit Design Retrofitting Roadside Roadside Appurtenances Simulation Test Level 3
Publication/ Report Number:

TRP-03-480-24
Resource Type:

Tech Report
Geographical Coverage:

Nebraska ; United States

Nebraska ; United States Less -
Edition:

Report: 2021 – 2024
Corporate Publisher:

Midwest Roadside Safety Facility
Abstract:

The Nebraska Department of Transportation (NDOT) frequently applies roadway overlays to the surface of bridges to extend the bridge’s lifespan. To minimize repair costs, NDOT does not desire to replace or alter any bridge rails with adequate structural capacity and height. Bridge rails installed to NCHRP Report 350 or MASH standards are likely to remain in place, though their effective heights would be reduced by the overlay. This creates a problem of attaching new, 31-in. tall approach guardrail transitions (AGTs) to existing concrete bridge rails and buttresses (after an overlay) that were not designed for such connections and the resulting system may not be crashworthy to current safety standards. The objective of this project was to develop retrofit options for attachment of thrie-beam AGT systems to existing NDOT bridge railings and buttresses. The project began with a review of existing bridge railings and end buttresses used by NDOT to identify issues related to connection hardware alignment and crash safety performance. Retrofit options were then developed to address these issues while adhering to established design criteria. A new connector plate assembly was designed to facilitate the attachment of the thrie-beam terminal connector to these bridge railings and buttresses. Additionally, three retrofit concepts, including concrete fill, a steel assembly, and a curb, were considered to mitigate concerns related to vehicle snag below the thrie beam. These selected retrofit concepts were evaluated through a combination of structural analysis and computer simulated crash tests. All simulations of the AGT attached to these buttresses through these retrofit concepts met MASH TL-3 safety performance criteria.
Format:

PDF
Funding:

SPR FY21(004) SG-01
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha-512:57f7ea3ad5f7dedab18055cf12d37cf42077363ab8e0ef0731865fe2ff2f552a8ddd6cfb55eb740ee877a96696b1f51079522aebabf88b01699ccb2ca3553b51
Download URL:

https://rosap.ntl.bts.gov/view/dot/77720/dot_77720_DS1.pdf
File Type:

No Additional Files

More +

Approach Guardrail Transition Retrofit to Existing Buttresses & Bridge Rails

Details:

Supporting Files

You May Also Like