Structural Analysis (MindTap Course List)
5th Edition
ISBN: 9781133943891
Author: Aslam Kassimali
Publisher: Cengage Learning
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Question
Chapter 9, Problem 14P
To determine
Find maximum positive shear and bending moment at point B due to the series of four moving concentrated loads.
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5.6 A section of highway has the following flow-
density relationship q = 50k - 0.156k2 [with q in veh/h
and k in veh/mi]. What is the capacity of the highway
section, the speed at capacity, and the density when
the highway is at one-quarter of its capacity?
8.20 Two routes connect a suburban area and a city,
with route travel times (in minutes) given by the
expressions t₁ = 6 + 8(x₁/c₁) and t₂ = 10 + 3(x2/c2),
where the x's are expressed in thousands of vehicles
per hour and the c's are the route capacities in
thousands of vehicles per hour. Initially, the
capacities of routes 1 and 2 are 4000 and 2000 veh/h,
respectively. A reconstruction project on route 1
reduces the capacity to 3000 veh/h, but total traffic
demand is unaffected. Observational studies note a
35.28-second increase in average travel time on route
1 and a 68.5% increase in flow on route 2 after
reconstruction begins. User-equilibrium conditions
exist before and during reconstruction. If both routes
are always used, determine equilibrium flows and
travel times before and after reconstruction begins.
8.19 Three routes connect an origin and a destination
with performance functions t₁ = 8+ 0.5x1, t2 = 1 +
2x2, and t3 = 3 + 0.75x3, with the x's expressed in
thousands of vehicles per hour and the 's expressed
in minutes. If the peak-hour traffic demand is 3400
vehicles, determine user-equilibrium traffic flows.
Chapter 9 Solutions
Structural Analysis (MindTap Course List)
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