A +3% grade intersects a -3.4% grade at station 2+990 of elevation 52.30m. Design a vertical summit parabolic curve connecting the two tangent grades to conform with the following safe specifications: Design velocity = 70kph Height of drivers eye from the road pavement = 1.37m = h, Height of object over the pavement = 650mm = h, Perception - reaction time = 2.5 sec = t Coefficient of friction between the road pavement and the tires = 0.15 = f Brake efficiency = 40% Determine: (a) Length of the curve (b) Station of P.C and P.T. and the location of the highest point of the curve (c) elevation of the highest point of the curve m/s) 2()(c0.15)(0.40)+0.03} 70 (v)? SSD = (v)(t) + G m/s)(2.5s) + 3.6 79.01m 2g(ftG) = 262.73m CE 223

A +3% grade intersects a -3.4% grade at station 2+990 of elevation 52.30m. Design a vertical summit parabolic curve connecting the two tangent grades to conform with the following safe specifications: Design velocity = 70kph Height of drivers eye from the road pavement = 1.37m = h, Height of object over the pavement = 650mm = h, Perception - reaction time = 2.5 sec = t Coefficient of friction between the road pavement and the tires = 0.15 = f Brake efficiency = 40% Determine: (a) Length of the curve (b) Station of P.C and P.T. and the location of the highest point of the curve (c) elevation of the highest point of the curve m/s) 2()(c0.15)(0.40)+0.03} 70 (v)? SSD = (v)(t) + G m/s)(2.5s) + 3.6 79.01m 2g(ftG) = 262.73m CE 223

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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