Fy = 235Mpa
Fu = 400Mpa
stress in old concrete
1400Kgf/cm2
A factor of safety against yield is applied to design stress Yield Stress/ Design Stress = Factor of safety The factor of safety varies for different industries; 1.5 is used in structural steel design for buildings; 1.25 or even 1.1 for aircraft/space systems
Permissible stress design (in USA construction more commonly called allowable stress design) is a design philosophy used by civil engineers. The designer ensures that the stresses developed in a structure due to service loads do not exceed the elastic limit.
Allowable stress would normally refer to design using Allowable Strength Design, also known as working strength design. In this the allowable stress is usually a fraction of the yield strength and can be different for uniform tension and bending. Typically mild steel has a yield strength of about fy=250MPa with allowable stresses in Tension, 0.6fy=150MPa Bending, 0.66fy=165MPa
ultimate stress=Factor of safety*Allowable stress
allowable bending stress for en8
allowable bending stress for en8
allowable stress design-2/3rd of yield working stress design is process yield
Depends on temperature.
stress in old concrete
70.4 megapascle
1400Kgf/cm2
1,642 lbs
800n/mm2
A factor of safety against yield is applied to design stress Yield Stress/ Design Stress = Factor of safety The factor of safety varies for different industries; 1.5 is used in structural steel design for buildings; 1.25 or even 1.1 for aircraft/space systems
1400 kgf/cm2 anindya