Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 13, Problem 1P
To determine
The main objective of conducting a transportation project evaluation.
Expert Solution & Answer
Explanation of Solution
The main objective of a transportation project evaluation is to furnish the appropriate information about the outcome of each alternative so that a selection can be made. The decision making by the person or group is based on the information relevant to the selection made. An essential input in the process is to know what information will be important in making a project selection. Different methods and approaches are used and applied for preparing a transportation project evaluation.
It also aims to report all the outcomes separately in a matrix format that provides decision maker with complete information about the project outcome. This information can be used in public forums for citizen input, and the decision process can be extended to include public participation.
Conclusion:
The main objective of a transportation project evaluation is to furnish the appropriate information about the outcome of each alternative so that a selection can be made.
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A:
Wel
Question 2
(a) A simple circular hollow section (CHS) tubular K-joint in a steel structure, subjected to balanced
axial loading, is illustrated in Figure 2a. Determine the maximum hot spot stress at the joint
intersection of the chord and the loaded brace B.
(b) The steel structure is installed in the seawater with cathodic protection. Determine the number of
stress cycles to failure based on the maximum hot stress range obtained in part (a). Use the
NORSOK standard. (Refer to S-N curves for tubular joints in air environment and seawater with
cathodic protection).
(c) Estimate the number of load repetitions required to induce fatigue failure in the tubular joint, based
on the load history provided in Figure 2b. The nominal yield and ultimate tensile strength are 355
N/mm² and 510 N/mm², respectively. Assume a damage limit of 1.0. Use the Modified Goodman
formulation to determine the equivalent completely reversed stress.
(d) Describe briefly the procedure to determine the hot…
The steel member is a fillet welded built-up section that comprises two flange plates (100mm x 20mm) and a
web plate (250mm x 10mm) as depicted in Section A-A. The leg size of the weld is 8 mm. Use an
appropriate consequence class. Based on the damage tolerant method and the modified Goodman equation.
Determine an equivalent completely reversed stress. Ignore the vibration and dynamic amplification. Use
Euro-code 1993-1-9.
(a) Calculate the maximum and minimum stresses at steel member section A-A.
(b) Check the fatigue resistance of the steel member at Section A-A using the fatigue limit.
(c) Discuss the possible failure mode of the steel member due to fatigue loading.
State your design assumptions, if any.
Steel plate (Flange)
100mm x 20mm
10.0 m
Fillet weld (manual)
(Typical)
Steel plate (Web)
250mm x 10 mm
Steel plate (Flange)
100mm x 20mm
Section A-A
Fixed end
Welded built-up
steel section
5.0 m
A
2.5m
3.0 m
Fatigue load range 5 kN
A
Total weight of steel section
Total weight of…
30
20
10
Stress
N/mm² 0
-10
-20
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Time
Question 1
A Grade S355 steel member, which forms part of the structural framework supporting a storage tank in a
warehouse, is subjected to various loads, as shown in Figure 1. The yield and tensile strength of the steel
member are 355 N/mm² and 510 N/mm², respectively. The steel member is subjected to axial tension due to
its self-weight and appurtenances of 40.0kN. The 10.0kN storage tank is positioned 1.0 m from the
centreline of the steel member, and it experiences a fatigue load range of 5.0kN.
The steel member is a fillet welded built-up section that comprises two flange plates (100mm x 20mm) and a
web plate (250mm x 10mm) as depicted in Section A-A. The leg size of the weld is 8 mm. Use an
appropriate consequence class. Based on the damage tolerant method and the modified Goodman equation.
Determine an equivalent completely reversed stress. Ignore the vibration and dynamic amplification. Use
Euro-code 1993-1-9.
(a) Calculate the maximum…
Chapter 13 Solutions
Traffic and Highway Engineering
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