- Roller support: prevents the translation in the vertical direction but not in the horizontal direction, and does not prevent the rotation. 2.1.[r]
(1)(2)2
CHAPTER
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(3)2.1 Introduction
2.2 Internal Stress Resultants
2.3 Example
2.4 Relationships between loads,
shear forces, and bending moments
2.5 Graphical Method for Constructing Shear
and Moment Diagrams
2.6 Normal, Shear force and
(4)2.1 Introduction
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- Structural members are usually classified according to the types of loads that they support
- Planar structures: if they lie in a single plane and all loads act in that same plane
2.1.1 Support connections.
(5)- Types of supports
2.1 Introduction
Idealized
A
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- Roller support: prevents the translation in the vertical direction but not in the horizontal direction, and does not prevent the rotation
2.1 Introduction
A
(7)2.1 Introduction
- Fixed (clamped) support: the bar can neither translate nor rotate
A
A V
A
H A
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(9)2.1.2 Types of beams
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2.2 Internal Stress Resultants
y z x Mx My Mz Qx NZ Qy
In general, internal stress resultants (internal forces) consist of components
• N
z–
Normal force
• Q
x, Q
y–
Shear forces
• M
x, M
y–
Bending moments
• M
z–
Torsional moment
Planar structures: if they lie in a single plane and all loads act in that same plane => Only internal stress resultants exert on this plane (zoy)
y z x Mx NZ Qy
• Nz – axial force (N); • Qy – shear force (Q);