Allowable stresses for prestressed concrete
Allowable stresses for prestressed concrete
(OP)
I have a question regarding AASHTO Standard Specifications, Section 9.15.2.2 - "Stress at Service load after losses have occured". I'm looking for some clarification relating to the final 3 condition.
Based on ACI318-99, I've concluded that final 1 is a crack control criteria and both compression and tensile stresses are checked in the beam. Final 2 limits compressive stresses to control long term creep & deflection issues and tensile stress is not checked.
However, I've been unable to find anything explaining what Final 3 represents. I'm fairly certain that only compressive stresses are checked for this condition. Is this correct.
Any help would be appreciated.
Based on ACI318-99, I've concluded that final 1 is a crack control criteria and both compression and tensile stresses are checked in the beam. Final 2 limits compressive stresses to control long term creep & deflection issues and tensile stress is not checked.
However, I've been unable to find anything explaining what Final 3 represents. I'm fairly certain that only compressive stresses are checked for this condition. Is this correct.
Any help would be appreciated.





RE: Allowable stresses for prestressed concrete
As a general comment - is sometimes difficult to apply general building codes to the bridges, as the design approach and theories used could be different.