SRB

• Mechanics – applied science which describes and predicts condition of rest or motion
• Space – notion of the position
• Mass – resistance to change in position
• Weight – amount of force acting on a mass due to acceleration due to gravity
• Force – action of one body / acceleration
• Characteristics of Force

  • Push
  • Pull
  • Magnetism
  • Gravity
  • Friction
• Principle of Transmissibilty - point of application of a force can be moved anywhere along its line of action
• Moment of a Force – perpendicular / bend
• Concurrent Force – contains forces whose lines of action meet at some point
• Static Equilibrium - system is either at rest or its center of mass moves at constant velocity. equilibrant force is a force that brings a body into mechanical balance
• Concentrated Load – idealized loads applies on a very small area with known magnitude
• Uniformly Distributed Load - spread across the axes beams.it can be converted into equivalent forces to make the solution process easy.
• Combined Point Load, UDL & UVL - area can be calculated using the formulas for rectangle & square
• Roller - allows free expansion, lateral movement, & rotation. takes vertical loads normal to roller plane
• Pin / Hinge – supports & takes horizontal & vertical loads as they determine the total reaction and its line of action
• Fixed Support – most rigid type of support or connection as it constrains member in all transitions and rotations
• Cable and Links Support – cables are high- tension members that can only support “tension” while links may hold both tensile and compressive force
• Frictional Resistance – surface to maintain equilibrium
• Truss – assembly of no. of members connected together by means of welding, used to support roofs, buildings, etc.
• Stable Truss – statically determinate (can be used without any problem)
• Unstable Truss – truss with redundant member
• Indeterminate Truss – truss with redundant support and the equilibrium equation cannot be used
• Tension –away from joint / positive
• Compressive – towards joint / negative
• Pin-Connected Frames – it can be disconnect (three force members)
• Internal Pins/Hinge (0 bending moment) - have the same magnitude on both side (R&L). used to remove redundant moments