An equal-tangent sag vertical curve on a section of a highway connects an initial grade of-2% and a final grade of +3.5% at station 25+00 and elevation 234 ft. The curve crossesan overpass at station 23+00. The base of the overpass structure is at elevation259.4 ft and is 14 ft above the pavement surface of the highway.LOverpassSta 23+00El 259.4'EVCBVC14'G1 =-2%G2 =-3.5%PVISta 25+00El. 234'a) Determine the elevation on curve at Sta 23+00.b) Determine the length of the vertical curve.b) Determine the design speed used to design the vertical curve. The length of the vertical curve islonger than the stopping sight distance.

g1 = initial grade = -2%g2 = final grade = +3.5%PVISTA = Stationing of EVC = 25 + 00yPVI = Elevation…

An equal-tangent sag vertical curve on a section of a highway connects an initial grade of -2% and a final grade of +3.5% at station 25+00 and elevation 234 ft. The curve crosses an overpass at station 23+00. The base of the overpass structure is at elevation 259.4 ft and is 14 ft above the pavement surface of the highway. Overpass Sta 23+00 BVC El 259.4' 14' G1=-2% PVI L Sta 25+00 El. 234' G2 =-3.5% EVC a) Determine the elevation on curve at Sta 23+00. b) Determine the length of the vertical curve. b) Determine the design speed used to design the vertical curve. The length of the vertical curve is longer than the stopping sight distance.

An equal-tangent sag vertical curve on a section of a highway connects an initial grade of -2% and a final grade of +3.5% at station 25+00 and elevation 234 ft. The curve crosses an overpass at station 23+00. The base of the overpass structure is at elevation 259.4 ft and is 14 ft above the pavement surface of the highway. Overpass Sta 23+00 BVC El 259.4' 14' G1=-2% PVI L Sta 25+00 El. 234' G2 =-3.5% EVC a) Determine the elevation on curve at Sta 23+00. b) Determine the length of the vertical curve. b) Determine the design speed used to design the vertical curve. The length of the vertical curve is longer than the stopping sight distance.

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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Question

An equal-tangent sag vertical curve on a section of a highway connects an initial grade of
-2% and a final grade of +3.5% at station 25+00 and elevation 234 ft. The curve crosses
an overpass at station 23+00. The base of the overpass structure is at elevation
259.4 ft and is 14 ft above the pavement surface of the highway.
L
Overpass
Sta 23+00
El 259.4'
EVC
BVC
14'
G1 =-2%
G2 =-3.5%
PVI
Sta 25+00
El. 234'
a) Determine the elevation on curve at Sta 23+00.
b) Determine the length of the vertical curve.
b) Determine the design speed used to design the vertical curve. The length of the vertical curve is
longer than the stopping sight distance.

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Step 2: Calculate stationing of BVC

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