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Fan
This cable pattern is usually preferred in a long-span cable-stayed bridge because it is a compromise of the other two extremes, with less axial force in the girder while providing cable supports for the tower legs.
Girder
The critical member that determines the maximum possible span in cable-stayed bridge.
Load path
The route that the load is being transferred from the point of application to the foundation.
safety and functionality
A bridge should be “safe, functional, economical, and good looking.” Which of the following should not be compromised?
conceptual
This stage in bridge design must consider all details of the bridge in all phases from beginning to completion, at least based on experience if not in actual analysis. This is to ascertain that the proposed concept is feasible under the given condiƟons.
1.15
What is the dynamic impact factor for fatigue limit state?
impact
This is the dynamic amplification of the live load effects on the bridge caused by the movement of the train across the span.
design lane
This AASHTO vehicle load emulates a caravan of trucks. It is spread over a 10 ft (3 m) wide area in the standard 12 Ō (3.6 m) lane.
Strength Limit State III
This load combination is different from the previous two that have a focus on vehicular loads without wind. It considers the bridge use subjected to an extreme wind load with a velocity exceeding 55 mph.
Service Limit State I
This load combination is to be used to check stress, deformation, cracking occurrence, and/or cracking width in normal operation. Thus the loads included are taken at their nominal values along with a 55- mph wind load.
pier cap
It offers substantial seating for girders and facilitates the distribution of loads from the bearings to the piers.