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Question

A symmetrical two-hinged parabolic arch rib has a span of 48 m between the abutment pins at the same level and a central rise of 10 m. Moment of inertia at any section follows the law I=I0secθ. If a load of 80 kN crosses the span then maximum horizontal thrust at the hinges will be ______ kN.
  1. 131.25

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Solution

The correct option is A 131.25


ILD for horizontal reaction at supports
H=25128×8410×80=131.25 kN

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