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Counterfort Retaining wall

 
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Pranamya K
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Joined: 18 Jul 2018
Posts: 2

PostPosted: Wed Jul 18, 2018 8:23 am    Post subject: Counterfort Retaining wall Reply with quote

Dear Subramanian Sir,

In “Design of Reinforced Concrete Structures” authored byyou, for the design of heel and stem of Counterfort Retaining Wall, the shearis checked at a distance “d” from the support (i.e., counterfort) (Example16.4, Step 6&7).

As per IS 456 Clause22.6.2 and Fig, 2, the shear can be taken at the distance “d” from the supportif the reaction causes a compression in the support. In case of Counterfortretaining wall, the soil load on the heel and stem induces tension in thecounterfort.

Hence, we feel that the shear is to be checked at the faceof the counterfort as it is an opening joint and crack propagation will be intothe support.

Kindly clarify.
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Dr. N. Subramanian
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Joined: 21 Feb 2008
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Location: Gaithersburg, MD, U.S.A.

PostPosted: Thu Jul 19, 2018 4:35 am    Post subject: Re: Counterfort Retaining wall Reply with quote

Dear Er. Pranamya


At present I am very busy and hence I request you to check Pillai and Menon book, pp. 734.

Best wishes
NS


Pranamya K wrote:
Dear Subramanian Sir,

In “Design of Reinforced Concrete Structures” authored byyou, for the design of heel and stem of Counterfort Retaining Wall, the shearis checked at a distance “d” from the support (i.e., counterfort) (Example16.4, Step 6&7).

As per IS 456 Clause22.6.2 and Fig, 2, the shear can be taken at the distance “d” from the supportif the reaction causes a compression in the support. In case of Counterfortretaining wall, the soil load on the heel and stem induces tension in thecounterfort.

Hence, we feel that the shear is to be checked at the faceof the counterfort as it is an opening joint and crack propagation will be intothe support.

Kindly clarify.
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Pranamya K
SEFI Member
SEFI Member


Joined: 18 Jul 2018
Posts: 2

PostPosted: Sat Jul 21, 2018 11:15 am    Post subject: Reply with quote

Dear Subramanian sir,

I had already referred the same in Pillai and Menon. Even there the shear is checked at the distance "d" from the support.Hence kindly reply whenever you are free.
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