Bridge Engineering Chapter Two
Bridge Engineering Chapter Two
Bridge Engineering Chapter Two
CHAPTER TWO
AMOUD UNIVERSITY
Civil Engineering department
Borama/Awdal/Somaliland
LECTURE #2
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CLASSIFICATION AND TYPES OF BRIDGES
Etc
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CLASSIFICATION BASED ON TYPE OF SUPER
STRUCTURE
1. Beam bridge
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• The force of compression is greatest at the top of the
arch. The abutments press against the bottom of the
arch, preventing the bases of the arch from being
pushed outward.
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TRUSS BRIDGE
• Wooden truss bridges were used as early as the 1500s,
but the first metal one was completed in 1841.
• They are very strong and have been used for railroad
bridges mainly because of the heavy loads that they can
support.
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• As traffic pushes down on the roadway, compression
acts on the upper horizontal members of the truss
structure.
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SUSPENSION BRIDGE
• Suspension bridges are strong and can span long
distances. One early bridge was designed and built in
1801 in Pennsylvania.
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CLASSIFICATION BASED ON THE SPAN LENGTH
OF THE BRIDGE
1. Culvert bridge
3. Major bridge
1. Timber bridge
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2. Masonry bridge
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3. Steel bridge
4. RCC bridge
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5. Pre-stressed concrete bridge
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CLASSIFICATION BASED ON THE FUNCTION OF
THE BRIDGE
1. Foot bridge
2. Highway bridge
4. Aqueduct bridges
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CLASSIFICATION BASED ON THE INTER SPAN
RELATION
• Beams and bridges are classified into three span
classifications that are based on the nature of the
supports and the interrelationship between spans. These
classifications are:
1. Simple bridge
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SOME CHARACTERISTICS OF SIMPLE SPAN
BRIDGES ARE
• When loaded, the span deflects downward and rotates
at the supports (i.e., the abutments)
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2. Continuous bridge
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3. Cantilever bridge
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SELECTION OF BRIDGE TYPE
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• Generally the following factors should be considered
when selecting the type of the bridge
Functional Requirements
Aesthetics
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