12.2 Let naandnB be the normal forces at the points of support. Choosing the origin at point A with F, = 0 andT = 0, we findnA + B - mB9-m-g = 0.Substituting, we havegivingnA + nB - 7.55Choosing the axis at point A, we have for the torque-m-dg-m₂(L/2g + ngL = 0,x 104 kg)g -(-(2.5+ng(0x 104 kg)XThe correct answer is not zero. m15= 02.55x 104 kg g = c0.✓m)g - (7.55 x 104 kg)(25mg A bridge of length 50.0 m and mass 7.55 x 104 kg is supported on a smooth pier at each end as shown in thefigure below. A truck of mass 2.55 x 104 kg is located 15.0 m from one end. What are the forces on the bridge atthe points of support?MA15.0 m-50.0 mB

Given: Mass of bridge mB=2.55×104 kgMass of truck mT=2.55×104 kgLocation of truck load from A=15…

A bridge of length 50.0 m and mass 7.55 x 104 kg is supported on a smooth pier at each end as shown in the figure below. A truck of mass 2.55 x 104 kg is located 15.0 m from one end. What are the forces on the bridge at the points of support?

A bridge of length 50.0 m and mass 7.55 x 104 kg is supported on a smooth pier at each end as shown in the figure below. A truck of mass 2.55 x 104 kg is located 15.0 m from one end. What are the forces on the bridge at the points of support?

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

12.2

Let na
and
nB be the normal forces at the points of support. Choosing the origin at point A with F, = 0 and
T = 0, we find
nA + B - mB9-m-g = 0.
Substituting, we have
giving
nA + nB - 7.55
Choosing the axis at point A, we have for the torque
-m-dg-m₂(L/2g + ngL = 0,
x 104 kg)g -(
-(2.5
+ng(0
x 104 kg)
X
The correct answer is not zero. m
15
= 0
2.55
x 104 kg g = c
0.
✓m)g - (7.55 x 104 kg)(
25
mg

A bridge of length 50.0 m and mass 7.55 x 104 kg is supported on a smooth pier at each end as shown in the
figure below. A truck of mass 2.55 x 104 kg is located 15.0 m from one end. What are the forces on the bridge at
the points of support?
M
A
15.0 m
-50.0 m
B

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