Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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A crest vertical curve connects a +4.44 % grade and a -6.87 % grade. The PVI is located at station 43 + 50.00 at an elevation of 1,240.00 feet. The design speed is 30 mph.
Determine the following:
- The length of the vertical curve using the AASHTO method (“K” factors) (1/8 pts.)
- The station of the PVC/BVC (1/8 pts.)
- The station of the PVT/EVC (1/8 pts.)
- The station of the high point (1/8 pts.)
- The elevation of the PVC/BVC (1/8 pts.)
- The elevation of the PVT/EVC (1/8 pts.)
- The elevation of the high point (1/8 pts.)
- The elevation of station 44+ 23.23 (1/8 pts.)
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- Step by step solutionProblem 1. An existing equal-tangent sag vertical curve is designed for 60 mph. The initial grade is -3% and the elevation of the PVT is 750 ft. The PVC of the curve is at station 134+00 and the PVI is at 137+00. An overpass is being constructed directly above the PVI. The overpass design assumes the driver’s eye height is 5 ft. Determine: a. the stopping sight distance b. the curve lengthc. the clearance heightd. the mid-curve offset e. the elevation of the PVIf. the elevation of the bottom of the overpass structureg. Is there a linear relationship between curve length and K-value in this problem? Note: No need to show calculations for case (g).arrow_forwardDetermine the minimum lenght of a crest vertical curve if the grades are +4% and -2%. Design speed is 112km/h. State assumptions used in solving this problem.arrow_forwardCalculate the stopping sight distance over the crest of a 450-m vertical curve with a plus grade of 5.6 percent and a minus grade of 3.2 percent.arrow_forward
- 1. (Crest Vertical Curve) A vertical curve is designed for 55 mi/h and has an initial grade of +2.5% and a final grade of -1.0%. The PVT is at station 114 + 25. It is known that a point on the curve at station 112 + 75 is at elevation 240 ft. What is the stationing and elevation of the PVC? What is the stationing and elevation of the high point on the curve?arrow_forwardA crest vertical curve will connect a 1.5% grade to a -3% grade with a design speed of 45 mph. Using the SSD (stopping site distance) criterion, what is the minimum length of the curve?arrow_forward
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