Modified Damage Assessment and Repair Design for Underpass Bridge Based on Fire Effect

Abstract:

Due to the fire effect, a frame underpass bridge had suffered a huge damage in Changjiang road in Harbin in the direction to Acheng. One span of the bridge was burned in large area, parts of which were burned badly. Many adjacent beams turned black at bottom of roofs; parts decoration of side wall were damaged to some extent. As a result, both directions of the traffic were disrupted, causing traffic jams. To make sure of repairing and restoring the traffic during the shortest period, Harbin municipal committee established the Changjiang road rescue headquarters. Under the precondition of utmost to save money and ensure that the repaired underpasses technology standards meet the design requirements, the research group were about to use steel plate or carbon fiber sheet as the reinforcing material, after detecting and identifying the bridge damage. Through a comprehensive consideration for the ascension of normal section bearing capacity of two reinforcing materials, pasting carbon fiber sheet was adopted to complete repair reinforcement scheme.

• Periodical: Key Engineering Materials (Volume 574)
• Pages: 67-76
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.574.67
• Online since: September 2013
• Authors: Zhong Long Li, Hong Lin Wu, Xiao Di Zhu, Hong Jiang Gu, Zhen Yu Liu, Tao Yin
• Keywords: Damage Assessment, Fire Effect, Reinforced Concrete Frame, Reinforcement, Strengthened by Carbonfiber Sheet, Strengthened by Steel Plate, Underpass Bridge

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