A transition curve is required for a dual carriageway road with a design speed vdesign = 23.61 m/s. The bearings of the two straights in question are 15° and 54°. Assuming a value of 0.35 m/s3 for C and a superelevation e = 7.0% 2.4 The form of the cubic parabola and the coordinates of the point at which the transition becomes the circular arc of radius R. 2.5. Plot the transition curve assuming a proper offset for the largest x or y coordinate. 2.6. What is the optimum value of "rate of change of radial acceleration” Copt that meets the criterion L≤ Lmax with the least difference (L = length of the transition curve; Lmax = maximum length of transition curve allowed by the UK Standards)? (hint: round up Copt to the 2nd decimal digit). 2.7. Plot a graph of C (x axis) against L (y axis) and comment on the results considering the followings: 2.7.1. Same initial design speed and superelevation conditions (i.e., vdesign = 23.61 m/s and e = 7.0%). 2.7.2. Same initial design speed with a superelevation e = 5.0% (i.e., vdesign = 23.61 m/s and e = 5.0%). 2.7.3. Same initial superelevation with a design speed = 19.44 m/s to the start of the transition, IT.

A transition curve is required for a dual carriageway road with a design speed vdesign = 23.61 m/s. The bearings of the two straights in question are 15° and 54°. Assuming a value of 0.35 m/s3 for C and a superelevation e = 7.0% 2.4 The form of the cubic parabola and the coordinates of the point at which the transition becomes the circular arc of radius R. 2.5. Plot the transition curve assuming a proper offset for the largest x or y coordinate. 2.6. What is the optimum value of "rate of change of radial acceleration” Copt that meets the criterion L≤ Lmax with the least difference (L = length of the transition curve; Lmax = maximum length of transition curve allowed by the UK Standards)? (hint: round up Copt to the 2nd decimal digit). 2.7. Plot a graph of C (x axis) against L (y axis) and comment on the results considering the followings: 2.7.1. Same initial design speed and superelevation conditions (i.e., vdesign = 23.61 m/s and e = 7.0%). 2.7.2. Same initial design speed with a superelevation e = 5.0% (i.e., vdesign = 23.61 m/s and e = 5.0%). 2.7.3. Same initial superelevation with a design speed = 19.44 m/s to the start of the transition, IT.

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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