A three-hinged parabolic arch of total span 30 m has its two end supports at 4 m and 16 m below the crown respectively. The arch carries two concentrated loads, each of 60 kN in the middle of each portion of the arch on both sides of the crown as shown in the figure. Determine the horizontal thrust and vertical components of the reactions at supports. Also determine the bending moments acting under the concentrated loads. 60 kN 30 m 60 KN E B 16 m

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