ποΈ Technical Insight: The Critical Difference Between Fixed and Pinned Supports
For every aspiring Civil Engineer, truly understanding the supports that hold our world together is non-negotiable. Itβs a concept that directly impacts design decisions.
Here is the fundamental difference between Fixed and Pinned supports in real-world structures π
π Pinned Supports (The Hinge)
What it does:Allows the structural member to rotate (like a door on a hinge) butprevents it from moving laterally (translation).
Resists: Two forces ( Horizontal Rβ and Vertical Rᡧ).
Allows: Rotation (Moment = 0).
Why we use it: Often used in truss bridges or simply supported beams where we need to accommodate slight expansion or contraction without building up high bending stress.
Technical Term: Statically Determinate β simple, efficient, and predictable in behavior.
𧱠Fixed Supports (The Solid Connection)
What it does: Prevents all movement β stops both translation and rotation.
Resists: Three reactions (Horizontal Rβ, Vertical Rᡧ, and Moment M_z).
Allows: Nothing (provides maximum rigidity).
Why we use it: Used in cantilever beams or moment-resisting frames where the connection must transfer bending moments for maximum stability.
Technical Term: Statically Indeterminate β more complex, but stronger and stiffer.
π Engineer Aspirants Nepal (EAN) β helping engineering students master concepts and practical understanding.
Engineer Aspirants Nepal(EAN)
ποΈ Technical Insight: The Critical Difference Between Fixed and Pinned Supports
For every aspiring Civil Engineer, truly understanding the supports that hold our world together is non-negotiable. Itβs a concept that directly impacts design decisions.
Here is the fundamental difference between Fixed and Pinned supports in real-world structures π
π Pinned Supports (The Hinge)
What it does:Allows the structural member to rotate (like a door on a hinge) butprevents it from moving laterally (translation).
Resists: Two forces ( Horizontal Rβ and Vertical Rᡧ).
Allows: Rotation (Moment = 0).
Why we use it: Often used in truss bridges or simply supported beams where we need to accommodate slight expansion or contraction without building up high bending stress.
Technical Term: Statically Determinate β simple, efficient, and predictable in behavior.
𧱠Fixed Supports (The Solid Connection)
What it does: Prevents all movement β stops both translation and rotation.
Resists: Three reactions (Horizontal Rβ, Vertical Rᡧ, and Moment M_z).
Allows: Nothing (provides maximum rigidity).
Why we use it: Used in cantilever beams or moment-resisting frames where the connection must transfer bending moments for maximum stability.
Technical Term: Statically Indeterminate β more complex, but stronger and stiffer.
π Engineer Aspirants Nepal (EAN) β helping engineering students master concepts and practical understanding.
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6 days ago | [YT] | 4