Hi, I'm trying to find out is there has been done any test or research that demonstrate the pure tensile bond capacity between the topping and the hollow core plank.
I've got the situation where the topping is fixed to the precast walls via reinforcement bars fully lapped with the mesh in the...
Hi,
I'm building an ETABS model which will have PT slabs. The PT slabs will be design in SAFE. I've done the preliminary design of the slabs and i know that 200mm works. My maximum long term deflection will be no more than 25mm. If i don't have the PT the deflection can be up to 60-70mm long...
Hi all,
We are currently modelling a car park conventional 225 RC slab in SAFE. the slab is flat (no drop panel or band beams). It is supported by precast panels along the boundaries, central core and concrete columns between the core and the external walls.
We have checked the deflection with...
Hi All
I'm designing a rammed concrete house. I've got a 10m long wall suspended in the air. It is supported at the two ends by the boundary walls and in the middle by a return wall which span full height, therefore the wall is vertically supported at the two edges and in the middle. It's...
Hi
I'm working on a multi level concrete structure modeled on etabs. Two columns supporting level 2 slab are transferred on level 1 slab.
We have exported level 1 slab in Safe but the transfer point loads from the columns are not there. I'm sure that this is a mistake from our end but we can't...
Hi all,
For the design of pad footings or rafts I use the equivalent beam approach for bending and shear design (and I check punching shear separately).
Using the beam approach i follow chapter 8 from AS3600.
Clause 8.2.5 (a) which require minimum shear reinforcement for sections deeper or...
Hi all,
To estimate the natural frequency of a tall structure, literature suggest to use the formula 46/H.
This is a general formula derived from tests on real structures. This formula is valid for structure which have been designed to perform under service and ultimate loads.
When I'm...
Hi all,
To estimate the natural frequency of a tall structure, literature suggest to use the formula 46/H.
This is a general formula derived from tests on real structures. This formula is valid for structure which have been designed to perform under service and ultimate loads.
When I'm...
Hi all
I'm analysing two tall structure, one is rectangular and one is circular. The drag coeffiecient for a rectangular structure is 2.2, for a circular structure is 1.2.
Does the 1170.2 allow you to reduce the wind loads based on the shape of the structure? Other international codes allow to...
Hi all
I'm performing the lateral analysis of a 40 storey building in Etabs. The structure is an office with central core and perimeter columns. The slab is 300 post tensioned.
the lift core is the only element resisting the lateral loads. I want to make sure that the connection between the...
Hi All
My company is currently using RAM Concept and RAM Structural System for the analysing of multi level buildings. We also use ETABS for the lateral analysis of tall structures.
For structures with a transfer slabs, structural system calculate the reactions on the transfer slab and then...
Hi All,
Has anyone came across with any programs or spreadsheet that calculate the lateral acceleration on high rise building during service wind load?
At the moment I'm creating my own spreadsheet based on ISO10137 and NS-EN 1991-1-4. It would be good to test it against any existing software...
Hi All
One of the governing criteria for the design of high rise structure is the Human Comfort Criteria for wind induced acceleration. ISO 10137 provide indications on the recommended lateral acceleration.
At the moment I'm calculating acceleration with a spreadsheet that i made which is...
