Mechanics of Materials
(CASE STUDY)
Investigation & Analysis for the
Collapse of the Kansas City Hyatt Regency Walkways (1981)
APPENDIX
Group Members (ME-05 B)
Ali Faizan Wattoo
Farhan Ellahi
Muhammad Umair Qazi
Gohar Shoukat
Usama Zaid Malik
NUST201305057BSMME
NUST201304475BSMME
NUST201305329BSMME
NUST201305490BSMME
NUST201304802BSMME
Submitted to
Dr. Irfan-Ul-Haq
Dr. Amir Mubashir
Page # 1
8-APPENDIX
8.1 FINITE ELEMENT ANALYSIS USING SOLIDWORKS
In order to validate our theoretical results we simulated the fabricated design on SOLIDWORKS
using Finite Element Analysis in order to get von mises stresses and factor of safety plot. The
fabricated design was constructed and necessary conditions were applied with following
assumptions
8.1.1 Walkway Model
Page # 2
8.1.2 Study Properties
Study name
Static 1
Analysis type
Static
Mesh type
Solid Mesh
Thermal Effect:
On
Thermal option
Include temperature loads
Zero strain temperature
298 Kelvin
Include fluid pressure effects from SolidWorks
Flow Simulation
Solver type
Off
Inplane Effect:
Off
Soft Spring:
Off
Inertial Relief:
Off
Incompatible bonding options
Automatic
Large displacement
Off
Compute free body forces
Off
Friction
Off
Use Adaptive Method:
Off
Result folder
SolidWorks document (C:\Users\Gohar\Desktop)
Direct sparse solver
8.1.3 Units
Unit system:
SI (MKS)
Length/Displacement
mm
Temperature
Kelvin
Angular velocity
Rad/sec
Pressure/Stress
N/m^2
Page # 3
8.1.4 Material Properties
Model Reference
Properties
Name:
Model type:
Default failure
criterion:
Yield strength:
Tensile strength:
Elastic modulus:
Poisson's ratio:
Mass density:
Shear modulus:
Thermal expansion
coefficient:
Components
Alloy Steel
Linear Elastic
Isotropic
Max von Mises
Stress
6.20422e+008
N/m^2
7.23826e+008
N/m^2
2.1e+011 N/m^2
0.28
7700 kg/m^3
7.9e+010 N/m^2
1.3e-005 /Kelvin
SolidBody 1
(Boss-Extrude2)(Rods-1),
SolidBody 1
(Boss-Extrude2)(Rods-2)
ASTM A36 Steel
Linear Elastic
Isotropic
Max von Mises
Stress
2.5e+008 N/m^2
4e+008 N/m^2
2e+011 N/m^2
0.26
7850 kg/m^3
7.93e+010 N/m^2
SolidBody 1(Boss-Extrude1)
(bridge assembly1/rectangular beam-1),
SolidBody 1
(Boss-Extrude1)(bridge
assembly-1/rectangular
beam-2),
SolidBody 1(Boss-Extrude1)
(bridge assembly2/rectangular beam-1),
SolidBody 1(Boss-Extrude1)
(bridge assembly2/rectangular beam-2)
Curve Data:N/A
Name:
Model type:
Default failure
criterion:
Yield strength:
Tensile strength:
Elastic modulus:
Poisson's ratio:
Mass density:
Shear modulus:
Curve Data:N/A
Page # 4
8.1.5 Mesh Information
Mesh type
Solid Mesh
Mesher Used:
Curvature based mesh
Jacobian points
4 Points
Maximum element size
0 mm
Minimum element size
0 mm
Mesh Quality
High
Remesh failed parts with incompatible mesh
Off
Mesh Information - Details
Total Nodes
19657
Total Elements
8971
Maximum Aspect Ratio
49.337
% of elements with Aspect Ratio < 3
8.82
% of elements with Aspect Ratio > 10
37.6
% of distorted elements(Jacobian)
0
Time to complete mesh(hh;mm;ss):
00:00:10
Computer name:
GOHAR_SHOUKAT
Page # 5
Name
Type
Min
Max
Stress1
VON: von Mises Stress
1.30328 N/mm^2 (MPa)
Node: 5044
1157.26 N/mm^2 (MPa)
Node: 15516
Figure 1 Isometric View of Beam showing the von Mises Stresses
Page # 6
Name
Type
Min
Max
Displacement1
URES: Resultant Displacement
0 mm
Node: 1
5.41336 mm
Node: 19277
Main Assembly-Static 1-Displacement-Displacement1
Name
Type
Min
Max
Strain1
ESTRN: Equivalent Strain
3.23153e-006
Element: 2855
0.002067
Element: 8770
Main Assembly-Static 1-Strain-Strain1
Page # 7
Name
Type
Min
Max
Factor of Safety1
Automatic
0.216027
Node: 15516
313.295
Node: 132
FIGURE 4
Main Assembly-Static 1-Factor of Safety-Factor of Safety1
FIGURE 5
Region of Maximum Stress
Page # 8
Isometric Sectional View of the Region of
Failure
Stresses in the Bottom Floor of the Structure
Page # 9
Equivalent Strain Diagram showing the deformation caused by the loading
condition created in the bolt connectors
Zoomed in view of Figure 3 showing the removal of nut from the bolt
Page # 10
Isometric View of the Box Beam depicting the possible deformation
leading to failure
Front View of the undeformed beam showing the applicable stresses
Page # 11
FIGURE 12 STRESS DIAGRAM SHOWING FAILURE IN THE STRUCTURE
FIGURE 13 Stresses in Hanger Rods
Page # 12
THE END
Page # 13