PPT: Three Hinged Arch | Structural Analysis - Civil Engineering (CE) PDF Download

 Page 1


“An arch can be defined as a humped or curved beam subjected 
to transverse and other loads as well as the horizontal thrust at 
the supports.” 
• It is simplest type of arch, consists of two section hinged 
at the crown and a hinge at support.
• The hinges at the support makes the ends of the arch to 
be fixed in position but not in direction.
• It is statically determinate structure.
Page 2


“An arch can be defined as a humped or curved beam subjected 
to transverse and other loads as well as the horizontal thrust at 
the supports.” 
• It is simplest type of arch, consists of two section hinged 
at the crown and a hinge at support.
• The hinges at the support makes the ends of the arch to 
be fixed in position but not in direction.
• It is statically determinate structure.
Page 3


“An arch can be defined as a humped or curved beam subjected 
to transverse and other loads as well as the horizontal thrust at 
the supports.” 
• It is simplest type of arch, consists of two section hinged 
at the crown and a hinge at support.
• The hinges at the support makes the ends of the arch to 
be fixed in position but not in direction.
• It is statically determinate structure.
• In case of beams supporting UDL, the maximum bending moment increases
with the square of the span and hence they become uneconomical for long
span structures. In such situations arches could be advantageously
employed, as they would develop horizontal reactions, which reduces the
design bendingmoment.
• Arches are mainly used in bridge construction and doorways. In 
earlier days arches were constructed using stones and bricks. In 
modern times they are being constructed of reinforced concrete and 
steel.
Page 4


“An arch can be defined as a humped or curved beam subjected 
to transverse and other loads as well as the horizontal thrust at 
the supports.” 
• It is simplest type of arch, consists of two section hinged 
at the crown and a hinge at support.
• The hinges at the support makes the ends of the arch to 
be fixed in position but not in direction.
• It is statically determinate structure.
• In case of beams supporting UDL, the maximum bending moment increases
with the square of the span and hence they become uneconomical for long
span structures. In such situations arches could be advantageously
employed, as they would develop horizontal reactions, which reduces the
design bendingmoment.
• Arches are mainly used in bridge construction and doorways. In 
earlier days arches were constructed using stones and bricks. In 
modern times they are being constructed of reinforced concrete and 
steel.
Page 5


“An arch can be defined as a humped or curved beam subjected 
to transverse and other loads as well as the horizontal thrust at 
the supports.” 
• It is simplest type of arch, consists of two section hinged 
at the crown and a hinge at support.
• The hinges at the support makes the ends of the arch to 
be fixed in position but not in direction.
• It is statically determinate structure.
• In case of beams supporting UDL, the maximum bending moment increases
with the square of the span and hence they become uneconomical for long
span structures. In such situations arches could be advantageously
employed, as they would develop horizontal reactions, which reduces the
design bendingmoment.
• Arches are mainly used in bridge construction and doorways. In 
earlier days arches were constructed using stones and bricks. In 
modern times they are being constructed of reinforced concrete and 
steel.