Structures and Bridges Flashcards
6 cards from real FDOT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Structures and Bridges flashcards as text
What is the minimum design life FDOT specifies for new bridge structures?
Answer: 75 years
FDOT and AASHTO LRFD specify a minimum design life of 75 years for new bridge structures, ensuring long-term serviceability.
What does a 'scour critical' bridge designation mean in FDOT bridge management?
Answer: The bridge foundation is vulnerable to erosion from water flow and may fail during floods
A scour critical designation means the bridge foundation is vulnerable to erosion by water flow during flood events, potentially undermining structural stability.
What FDOT specification section covers prestressed concrete bridge member fabrication requirements?
Answer: Section 450
FDOT Section 450 covers the fabrication and construction requirements for prestressed concrete bridge members, including beams, piles, and deck panels.
What is the purpose of the FDOT 'Load Rating' process for existing bridges?
Answer: Determine the maximum vehicle weight a bridge can safely carry
Load rating determines the maximum safe vehicle loads that an existing bridge can carry, establishing legal load limits and identifying deficient structures.
What is the significance of a bridge receiving a 'structurally deficient' designation from FDOT?
Answer: The bridge has condition ratings or load ratings below threshold values, indicating a need for repair or replacement
A structurally deficient designation indicates the bridge has condition ratings below threshold values or inadequate load capacity, flagging it for priority repair or replacement funding.
What type of bearing allows rotation but not translation in FDOT bridge bearing design?
Answer: Fixed bearing
A fixed bearing allows the bridge superstructure to rotate (flex) but restrains horizontal translation, anchoring the bridge at that point.