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Assessment, Repair, and Replacement of Bridges Subjected to Fire.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Assessment, Repair, and Replacement of Bridges Subjected to Fire./
作者:	Afzal, Rabia.
面頁冊數:	1 online resource (193 pages)
附註:	Source: Masters Abstracts International, Volume: 85-07.
Contained By:	Masters Abstracts International85-07.
標題:	Transportation. -
電子資源:	click for full text (PQDT)
ISBN:	9798381434866

Assessment, Repair, and Replacement of Bridges Subjected to Fire.
Afzal, Rabia.

Assessment, Repair, and Replacement of Bridges Subjected to Fire. - 1 online resource (193 pages)

Source: Masters Abstracts International, Volume: 85-07.

Thesis (M.S.)--Iowa State University, 2023.

Includes bibliographical references

Although bridge failures resulting from fire are not as common as other failures (scour, collision, wind, etc.), they still pose impacts on safety, traffic flow, and owner budgets as repairs or replacements can be costly. Due to the lack of technical information and guidance needed to evaluate fire damage on concrete bridges, this research was conducted to aid bridge owners in their decisions for both immediate and long-term use of prestressed concrete girder bridges subjected to fire. A fire under the I-29 northbound bridge over Perry Creek Conduit in Sioux City, Iowa was exacerbated when a propane tank used in a homeless encampment exploded on October 30, 2019. Due to the low ground clearance beneath this single-span precast prestressed concrete beam bridge, the fire had impacted multiple girders underneath, leading to exposed strands and stirrups throughout the bridge. Although the explosion was an unfortunate incident, the fire-damaged girders provided an opportunity to learn more about the residual strength and serviceability of the bridge. The Iowa Department of Transportation (DOT) elected for the removal and replacement of the bridge, allowing the girders to undergo testing. Three fire-damaged girders were selected from the I-29 Sioux City bridge. They were removed and transported to the Iowa DOT Maintenance Garage in Ames, Iowa. The girders were visually assessed and selected for structural tests based on the apparent level of damage incurred; one low-level, one mid-level, and one high-level. The goal was to compare the effects of various levels of damage and assess the impacts the fire event had on the serviceability and strength of the bridge. The results from the load and material tests revealed that the intensity (temperature) and duration of the fire did not have significant impact on the load carrying capacity. The damage did not progress beyond the concrete cover and the structural integrity of the girders was not compromised. Surface-level repairs were recommended to protect the steel reinforcement. This research built and expanded on the information and data collected from other published research studies to provide recommendations to minimize fire damage on bridges through suggestions for fire prevention policies and management strategies. The outcome provided technical guidance regarding the evaluation of fire-damaged girders to assist bridge owners in their decision to repair or replace fire-damaged bridges.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381434866Subjects--Topical Terms:

558117
Transportation.
Subjects--Index Terms:

BridgesIndex Terms--Genre/Form:

554714
Electronic books.

Assessment, Repair, and Replacement of Bridges Subjected to Fire.
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