Ahmad Zamanifar

11 Questions 9 Answers 0 Followers

Questions related from Ahmad Zamanifar

What shal be the over strength factor for these type of concrete shear walls?

Hello all I have a question about increasing the shear force of concrete shear walls due to dynamic effects. How can we determine the small omega or the over strength factor for shear design of...

last month 8,402 0 View

Is it useful ??

Hello, Professor. Is it useful to place a thick steel plate -well anchored by bolts in a column at the face of an external concrete beam-column joint- and expect this configuration to behave as an...

12 March 2025 3,593 1 View

Are there any differences between shear requirements in slab+footing ??

Hello Are there any differences between shear requirements in slab+footing and beams in other codes such as CSA ....AS .... NZS EC .... ? I attached a sample mentioned in ACI-318. Ahmd.

05 June 2022 5,090 0 View

WHERE is it necessary to use minimum shear reinforcement in shallow concrete ?

Hello all WHERE is it necessary to use #minimum #shear #reinforcement in shallow concrete #foundations? I am wondering between these two criteria: #ACI -18-2019 (phi*Vc) or...

20 April 2021 915 4 View

Can this beam be behave like a ductile beam?

These beams have the same deep as the waffle has, and they have been detailed just like a beam for seismic requirements. Can these beams and columns act as a ductile frame?

21 January 2021 9,622 2 View

ASCE 7-2010 Why only upward?

As you know better ,ASCE -7 SEC. 12.4.4 says:“In Seismic Design Categories D, E, and F, horizontal cantilevers are designed for an upward force that results from an effective vertical...

02 May 2016 690 2 View

Is torsional irregularity of building plans important while displacements are too small ??

Hi all - is there any reference similar to ASCE 7 or UBC+IBC that let us ignoring plan irregularity ,when displacements at floors are very small ?? I mean when displacements are very small but...

01 May 2016 1,284 2 View

What is the rule of the additional diagonal member ??

Hi everybody Can anyone tell us what is the rule of the additional diagonal member in open web steel joist?

29 May 2015 4,596 1 View

Why is shear lag only important for tension members and not in compressions?

Hi all Can anyone tell us why { in AISC-360 } shear lag is considered only for tension members and not in compressions ?? thanks

27 May 2015 2,909 4 View

Restrictions for low dutilty

We should pay a penalty for the construction of low ductile structures in high seismic zones and it is using a low reduction factor (Ru= ASCE-7 q = EUROCODE-8). Now the question is : Why it is...

01 January 1970 7,938 0 View

Why shear walls are excluded ?

ACI 318-19 Has excluded shear walls for those elements that are not intended to work in seismic but it (ACI-318) has some requirements for beams+columns+joints. WHY? Ahmad.

01 January 1970 324 7 View