2 posts in this topic
By waqar saleem
I have observed that some senior engineers have not been using stiffness modifiers in their designs. What is the concept behind i am not clear . As we design RC for strength, section is cracked and to cater for this cracked section, property modifiers are used as per
ACI 318-11 10.10.4 (stiffness requirement)
ACI 318-11 8.7 (stiffness requirement)
UBC97 1630.1.2 (modelling requirement)
so why whole section is considered in design. is there any other logic which i couldn't understand.
By Engr Waqas
Assalam o alaikum,
I was reading ETABS concrete frame design manual ACI 318-08. In beam design section, it gives two formulae which I am unable to find in books. One formula for stress block depth and one formula for negative steel calculation. I have highlighted the formulae in below images. The manual design using these formulae and conventional formulae gives the same result. But kindly guide me from where I can get derivation of these formulae or theory behind this.
By Meesum Zaidi
I m currently analysing multi story building on Etabs, I need to apply 4 and 6 inch wall load and would like to know how that can be done.
in this building maine no load bearing 4 inches and 6 inches ki walls use kari hain load assign kaise hoga walls pe ye samajh nhi arha line load apply karun ya area type load please help