Arches

Arches may be of curved girder, either a solid rib or braced supported at its ends and which load carriers are frequently vertical

• longitudinal load

• Transverse load

• Bending moment

• shear stress

An arch is a beam except for ____

• It does not resist inclined load

• It does not resist transverse forces

• It does not allow rotation at any point

• It does not allow horizontal movement

Arches are subjected to three restraining forces namely thrust, shear force and

• Longitudinal load

• Transverse load

• Bending moment

• Inertial moments

The shape of cable under horizontal uniformly distributed load is

• Parabolic

• Catenary

• Circular

• Triangular

A three-hinged arch is said to be

• Statically determinate structure

• Statically indeterminate structure

• Bent beam

• None of these

A symmetrical three hinged parabolic arch of span 40m and rise 8m carries a udl of 30kn/m over left half of the span. The hinges are provided at the supports and at the centre of the arch. Calculate the reaction at the support A as shown in the fig.

• V_A= 150 kN

• V_A = 250 kN

• V_A = 350 kN

• V_A =450 kN

A symmetrical three hinged parabolic arch of span 40m and rise 8m carries a udl of 30kn/m over left half of the span. The hinges are provided at the supports and at the centre of the arch. Calculate the reaction at the support b as shown in the fig.

• V_B =450 kN

• V_B = 150 kN

• V_B = 250 kN

• V_B =350 kN

For a three hinged parabolic arch, what will be the ratio l/R to satisfy H=W?

• 0.50

• 1.50

• 2.00

• 4.00

A three hinged parabolic arch of span ‘l’ and Rise ’h’ is subjected to UDL of intensity ‘W’, then the horizontal thrust at support is

• Wl²/8h

• Wl/h

• Whl/8

• Wl/8h²

Which of the following statements are correct in respect of temperature effect on a load carrying three hinged arches?

• No stresses are Produces in a three hinged arch due to temperature change alone.

• There is a decrease in horizontal thrust due to a rise in temperature

• There is an increase in horizontal thrust due to a rise in temperature.