Treatise on the Theory of the Construction of Bridges and Roads

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1893 - Bridges - 249 pages
 

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Contents

Definition of the Panel System
115
Discussion of Equation 128
117
A CounterBrace 120 1
120
Values of No 121 1
121
General Value of the Second Differences
123
Stress on any Diagonal
124
Uniformly Distributed Load 125 1
125
Stress on the Verticals
127
Stress upon the Chords
129
Examples
130
Load concentrated at one Point
131
Stress on the Chords for an unequallydistributed Load
132
Multiple Systems
133
A Second Problem of Minimum Material
136
Minimum Material in a Post and Tie combined
140
Longs Truss
143
Howes Truss
145
Main Braces in Howes Truss
146
CounterBraces
147
Keying the CounterBraces
149
The Vertical TieRods in Howes Truss
150
Whipples Truss
151
Analysis of the DoublePanel System as shown in Fig 92
155
Posts Truss
162
Extra Strains considered
170
Halls Lattice
171
KneeBraces
172
Continuous LoadingVertical Shearing Stress
173
General Problems Unsolved
176
Law of Strains upon the Chords
177
Law of Relation between the vertical Shearing Stress and Moments of Applied Forces
178
CHAPTER IV
179
PARABOLIC ARCHED TRUSSDefinition and Notation
180
Case of Uniform Load
182
Case of a Partial Uniform Loadwhen the Diagonals are Ties
183
Case of a Partial Uniform Loadwhen the Diagonals are Braces
184
Triangular TrussingParabolic Arched Truss
185
Strains on the upper Chordfound by Moments
186
A General Problem
187
Both Chords Curved
188
CHAPTER V
190
Burr Truss
191
A Third Example of Compound Structures
192
PART III
193
General Data
194
Load on the Flat Part of the University Roof
197
Weight of Snow
199
Weight of the Dome on the University Roof
201
Analysis of the University Roof Truss
202
Cambre of Trusses
209
Case of Secondary Trussing in which the Bays in the Lower Chord are equal to each other
211
Another Form of Roof Trussing
218
The preceding Form modified
223
GENERAL EQUATIONS
224
APPENDIX I
243

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