A symmetrical parabolic curve passes through point A whose elevation is 23.23m at a distance meters from P.C. The elevation of the P.C. at station 4+100 is 22.56m. The grade of the back ta is +2% and the length of the curve is 120m.. Determine the grade of the forward tangent. -2.3%

A symmetrical parabolic curve passes through point A whose elevation is 23.23m at a distance meters from P.C. The elevation of the P.C. at station 4+100 is 22.56m. The grade of the back ta is +2% and the length of the curve is 120m.. Determine the grade of the forward tangent. -2.3%

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Curve setting

A curve is a turn that is provided horizontally or vertically in the design of highways, railways, and runways. A curve connects two straight lines that are separated by the deflection angle. It helps to change the direction and alignment of the highways, railway tracks, and runways. Therefore, the gradual change in their alignment is made by using a curve to provide comfort to the passengers and this also provides an easy turn to change the direction of the moving vehicle.

Question

A symmetrical parabolic curve passes through point A whose elevation is 23.23m at a distance of 54
meters from P.C. The elevation of the P.C. at station 4+100 is 22.56m. The grade of the back tangent
is +2% and the length of the curve is 120m.. Determine the grade of the forward tangent.
-2.3%
O -1.4%
-3.3%
+2.5%

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