Relative Deflection
Definition of the term relative deflection is evident from the figure. The program searches regions on buildings with the maximum relative deflection both upwards and downwards. Clearly, from the damage of the building point of view the most critical is the relative deflection upwards leading to the "tensile opening" of building.
Relative deflection
Verification of the maximum relative deflection is left to the user - the following tables list the ultimate values recommended by literature.
Type of structure | Type of damage | Ultimate relative deflection Δ/l | |||
Burland and Wroth | Meyerhof | Polshin a Tokar | ÈSN 73 1001 | ||
Unreinforced bearing walls | Cracks in walls | For L/H = 1 - 0.0004 For L/H = 5 - 0.0008 | 0.0004 | 0.0004 | 0.0015 |
Cracks in bearing structures | For L/H = 1 - 0.0002 For L/H = 5 - 0.0004 | - | - | - | |