Collapse load of a structure.
Collapse load is found for a structure by investigating various possible collapse mechanisms of a structure under conceivable load systems. For any given mechanism, possible plastic hinge locations are determined by noting the types of loads and support conditions remembering that under increasing loads, the plastic hinges would form in a sequence defined by corresponding elastic moments at the possible plastic hinge locations.
Plastic Hinge Occours
The plastic hinge occours at following
• At the point of maximum moment.
• At the connection involving change in geometry.
• Under the concentrated load.
• At the point of zero shear in span, loaded by uniformly distribute load.
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