MIK

Walikom Salam.

What will be the problem if you stack excavated material (filled in bags) on the raft as a dead load after constructing the lower Basement floor to balance the load from the uplift during construction???

Thanks for the paper link

On 1/2/2021 at 11:07 AM, Ayesha said:

Another alternate would be to provide epoxy grout to join the two surfaces on either side of the crack.

ok. it will be good if it can satisfy shear transfer requirements.

Please share the relevant paper which you have referred in your last reply.

35 minutes ago, Ayesha said:

 Also, I have difference of opinion for your case. I checked the topic at Eng-Tips as the question is explained in much More detail than here (I would suggest you edit your question above and include additional details). 

The topic at Eng-Tips refers to the same issue which is posted by one of my friend, working on the same issue.

Actually the contractor have provided the construction joint at the wrong location with no shear key arrangement.

So, we are going to investigate the shear transfer through the construction joint.

we are applying shear friction concept for transferring shear forces through the construction joint. But there is no clear explanation available about the use of flexural reinforcement in sher friction equation.

My question was can we use Avf equal to flexural reinforcement in the below equation (6) ?

Thanks @Ayesha for your prompt reply.

According to ACI-318-19 section 22.9 

This section is also applicable to construction joints, as highlighted in the above snaps from ACI-318-19. I was asking about Avf in the above equation 22.9.4.2 which is the area of reinforcement crossing the assumed shear plan (in our case interface between old and new concrete). Provided flexural reinforcement is raft is also perpendicular to the assumed shear plane (interface between two concrete pours)

The same problem is discussed in the link below

https://www.eng-tips.com/viewthread.cfm?qid=477681

Assalamu Alaikum

I have some confusion about shear transfer through construction joints in rafts

1) Can we use flexural reinforcement at the top and bottom of the raft for transferring shear through the construction joint?

2) If yes than how will be the mechanism?

3) How can we use flexure reinforcement for both flexure and shear action in the context of shear transfer through construction joints? 

Thanks

A.O.A...

While satisfying B/C capacity ratios according to codal limits, is it the right way to use provided steel in the colum section and set the section to "section to be checked"???

As some times the ETABS provides minimum reinforcement in the columns and whil calculating B/C ratios it uses moment against that minimum reinforcement and as the reinforcement is minimum it shows O/S ( over stress).

Dear All 

Please explain how ETABS V 9 create Load Combinations, the load combinations for Seismic Zone 2B and Soil Profile SD is not matching with the load combinations made by ETABS v9 I  am attaching the Load combination of UBC-97 calculated manually... 

Dear All ...

I am using ETABS V 9 from about 2 years but recently i came to know that Version 9 consider beam as a rectangular beam while it is T-beam in reality (I am talking about RCC Structure) it is a deficiency in some case when we have Torsion and Shear Problem....so i shifted to ETABS V 16 to tackle the mention problem and also many more problems. Now the issue is that i have problem in defining T-Beams/L-Beams and the connectivity of the slab..Please any one can Explain how to tackle the problem ....Thanks

well explain by Baz but i want add to it

1.) Load Patterns refer to the types of load which will be used like Dead, Super Dead ,Live , Earth Quack etc.

2.) Load Cases refer to the Analysis 

3.) Load Combinations refers to Design 

Thanks Dear Umar Makhzumi for your suggestion. i am using ETABS V 9 but now i want to shift to advanced versions so i need help from the experienced persons already using the advanced version that which one should i use. i have left with two option version 15 and version 16..which one should i use?

Deal All 

Please suggest according to your experience that which Etabs Version is the Best one in the latest Version starting from Version 9 to version 16

Thanks

 A.O.A..

Dear All, i am shifting form Etabs Version 9 to Etabs Version 15 can any one explain that what are the advantages in the Advanced version of Etabs (Version 15) and also the disadvantages ..

Pleas give me your precious opinions about the topic ...

Best Regards  

Thanks for the help

i have searched a lot but could not find any satisfactory document. if you can share the relevant document with me... thanks 

Dear all, can any one explain how Etabs calculate joint shear capacity of the RCC structure